Aenesidemus of Knossos

100 BCE – 50 BCE

Knossos (Crete)

Greek (Crete) philosopher from Knossos (Crete) who revived Pyrrhonian skepticism through the Ten Modes, suspension of judgment, and anti-dogmatic critique.

Aeschines of Sphettus

425 BCE – 350 BCE

Sphettus (Attica)

Athenian Socratic philosopher whose fragmentary dialogues preserve early non-Platonic Socratic arguments about self-knowledge, virtue, education, wealth, and civic excellence.

Agastya

1500 BCE – 1200 BCE

Southern peninsular India (traditional)

Vedic and pan-Indian sage whose broad tradition links hymnic authority, ascetic discipline, grammar, natural knowledge, and religious philosophy.

Ajita Keśakambalin

550 BCE – 450 BCE

Magadha region

Magadhan sramana materialist who denied afterlife, karmic fruit, ritual efficacy, and a soul separable from the body.

Anaxagoras of Clazomenae

500 BCE – 428 BCE

Clazomenae (Ionia)

Ionian Greek natural philosopher from Clazomenae whose Nous cosmology, mixture theory, infinite divisibility, material astronomy, and Athenian reception shaped classical natural philosophy.

Anaximander of Miletus

610 BCE – 546 BCE

Miletus (Ionia)

Ionian Greek philosopher from Miletus whose apeiron, natural necessity, cosmology, map tradition, and early prose inquiry shaped Presocratic metaphysics and natural philosophy.

Anaximenes of Miletus

586 BCE – 526 BCE

Miletus (Ionia)

Ionian Greek philosopher from Miletus whose air-arche, rarefaction and condensation theory, soul-breath analogy, and natural explanations of change shaped Milesian and Presocratic philosophy.

Antiphon of Athens

480 BCE – 411 BCE

Rhamnus, Attica

Athenian logographer and sophistic thinker from Rhamnus whose homicide speeches, Tetralogies, and fragments on truth and concord explored law, nature, justice, rhetoric, equality, and political order.

Antisthenes of Athens

445 BCE – 365 BCE

Athens (Attica)

Athenian Socratic philosopher associated with Cynosarges whose ascetic ethics, virtue-sufficiency thesis, critique of luxury and convention, attacks on Platonic Forms, and paradoxes of definition and predication shaped Cynicism, Stoicism, ancient logic, and philosophy of language.

Arcesilaus of Pitane

315 BCE – 241 BCE

Pitane (Aeolis)

Greek Academic skeptic from Pitane who led Plato's Academy in Athens, attacked Stoic cognitive impressions, argued for suspension of assent, and framed practical action without dogmatic belief.

Aristippus of Cyrene

435 BCE – 356 BCE

Cyrene

Greek Socratic philosopher from Cyrene who founded the Cyrenaic school, made present pleasure central to ethics, emphasized immediate experience, and shaped ancient debates over hedonism and practical freedom.

Aristotle

384 BCE – 322 BCE

Stagira, Chalcidice

Greek philosopher from Stagira, student of Plato, tutor of Alexander, and founder of the Lyceum whose logic, metaphysics, psychology, ethics, politics, rhetoric, poetics, biology, and philosophy of science shaped later philosophy.

Aristoxenus of Tarentum

375 BCE – 300 BCE

Tarentum (Taras, Magna Graecia)

Greek Peripatetic philosopher and music theorist from Tarentum whose harmonics, rhythmics, perception theory, and Pythagorean ethical traditions shaped ancient aesthetics and philosophy of science.

Atri

1500 BCE – 1200 BCE

Indo-Gangetic region (Vedic heartland)

Vedic rishi and Atreya-lineage seer associated with Rigveda Mandala 5 whose hymns join ritual praise, cosmic order, truth, healing, restraint, compassion, natural observation, and Vedic theology.

Augustine of Hippo

354 CE – 430 CE

Tagaste, Numidia

North African Latin Christian philosopher and bishop from Tagaste and Hippo whose accounts of memory, time, will, grace, evil, signs, love, political order, and the Trinity reshaped late antique, medieval, Christian, and modern philosophy.

Bādarāyaṇa (Vyāsa)

500 BCE – 420 BCE

Indo-Gangetic region (traditional)

Indian sage-philosopher traditionally identified with Vyāsa and Bādarāyaṇa, linked to Vedānta, the Brahma Sūtras, epic philosophical teaching, Brahman, self, liberation, scripture, reason, and the metaphysical interpretation of Vedic revelation.

Basil the Great

330 CE – 379 CE

Caesarea, Cappadocia

Cappadocian Greek Christian bishop and theologian from Caesarea whose Trinitarian theology, account of the Holy Spirit, anti-Eunomian metaphysics, ascetic ethics, social teaching, biblical exegesis, and classical-learning pedagogy shaped Nicene Christianity, monastic practice, Byzantine thought, and philosophy of religion.

Bharadvāja

1280 BCE – 1200 BCE

Indo-Gangetic region (traditional)

Vedic rishi and Bharadvāja-family seer associated with Rigveda Mandala 6 whose hymns to Agni, Indra, Sarasvatī, Pūṣan, the Aśvins, dawn, cosmic order, and ritual power shaped Vedic theology, sacred speech, sacrificial ethics, poetic knowledge, and early Indian philosophy of religion.

Bhartṛhari

450 CE – 510 CE

Ujjayinī region (Malwa)

Indian grammarian-philosopher from the Ujjayinī/Malwa tradition whose Vākyapadīya, sphoṭa theory, śabda-brahman metaphysics, sentence-meaning analysis, linguistic cognition, and discipline of speech shaped Sanskrit philosophy of language, ontology, epistemology, logic, and religious thought.

Boethius

480 CE – 524 CE

Rome

late antique Roman philosopher, statesman, translator, and Christian theologian from Rome whose logical translations and commentaries, theory of universals, account of providence, eternity, free will, participation, and philosophical consolation transmitted Greek philosophy to the medieval Latin West.

Carneades of Cyrene

214 BCE – 129 BCE

Cyrene (Cyrenaica)

Cyrenaic Greek Academic skeptic who led the New Academy, challenged Stoic certainty, developed the pithanon as practical guidance, argued on both sides of disputed questions, and made suspension of assent central to Hellenistic epistemology.

Chrysippus of Soli

279 BCE – 206 BCE

Soli, Cilicia

Stoic philosopher from Soli whose lost system of logic, physics, ethics, fate, providence, language, and knowledge made him the main architect of early Stoicism after Zeno and Cleanthes.

Cicero (Marcus Tullius Cicero)

106 BCE – 43 BCE

Arpinum, Roman Republic

Roman statesman, orator, lawyer, and philosopher who turned Greek ethics, skepticism, theology, rhetoric, and republican political thought into enduring Latin civic philosophy.

Cleanthes of Assos

331 BCE – 232 BCE

Assos in the Troad

Early Stoic head from Assos whose Hymn to Zeus, lost title catalogue, and teaching on providence, duty, impulse, logic, beauty, and living according to nature carried Zeno school into Chrysippus generation.

Clement of Alexandria

150 CE – 215 CE

probably Athens

Greek Christian philosopher and Alexandrian teacher who joined Platonist learning, biblical interpretation, moral formation, and Christian gnosis into an early account of faith perfected by reason.

Confucius

551 BCE – 479 BCE

Zou, Lu (near Qufu, Shandong)

Ancient Chinese teacher from the state of Lu whose account of learning, ritual, humane conduct, music, names, family reverence, and virtuous government became the center of the Confucian tradition.

Crantor of Soli

335 BCE – 275 BCE

Soli, Cilicia

Old Academic philosopher from Soli in Cilicia whose lost On Grief and early commentary on Plato's Timaeus made consolation, soul theory, and Platonic interpretation central to later Academic reception.

Crates of Athens

c. 335 BCE – 268/7 BCE

Thria, Attica

Old Academy scholarch from Thria in Attica, remembered as Polemo's close Academic associate and predecessor to Arcesilaus in the Athenian school.

Crito of Alopece

469 BCE – 399 BCE

Alopece, Attica

Athenian friend of Socrates from Alopece, remembered as the prison interlocutor who urged escape and became a reception figure for justice, civic duty, and political obligation.

Damascius

462 CE – 538 CE

Damascus

Last head of the Athenian Neoplatonic school, born in Damascus, whose aporetic first-principles metaphysics tests what language, thought, and theology can say about the ineffable.

Dao'an

312 CE – 385 CE

Changshan Commandery / Fuliu, Hebei

Chinese Buddhist organizer, exegete, and translation leader who shaped Prajnaparamita interpretation, monastic discipline, scripture cataloging, and the language of early Chinese Buddhism.

Democritus of Abdera

460 BCE – 370 BCE

Abdera, Thrace

Presocratic atomist from Abdera whose philosophy explained nature, mind, perception, ethics, language, mathematics, and religion through atoms, void, causal necessity, and measured cheerfulness.

Dharmaraksa

233 CE – 310 CE

Dunhuang

Yuezhi-descended Buddhist translator from Dunhuang whose Western Jin translation communities carried Lotus, Prajnaparamita, Pure Land, Manjusri, and Buddha-land traditions into Chinese Buddhist thought.

Diogenes of Apollonia

460 BCE – 400 BCE

Apollonia Pontica, Thrace

Presocratic natural philosopher from Apollonia Pontica whose surviving fragments explain cosmos, soul, perception, physiology, and divine intelligence through air.

Diogenes of Oenoanda

70 CE – 140 CE

Oenoanda, Lycia

Second-century Epicurean from Oenoanda in Lycia whose monumental inscription turned philosophy into public therapy against fear, superstition, pain, death, and false beliefs about the gods.

Dīrghatamas Āucathya

1135 BCE – 1065 BCE

Eastern Indo-Gangetic region (Anga tradition)

Rigvedic seer associated with hymns 1.140-1.164, especially the riddle-cosmology of 1.164, where speech, mind, number, divine multiplicity, and hidden order become philosophical poetry.

Dong Zhongshu

179 BCE – 104 BCE

Guangchuan / Wencheng, Hebei

Western Han Confucian thinker from Guangchuan, remembered for joining Gongyang classicism, Heaven-human resonance, yin-yang and Five Phases cosmology, moral rulership, and imperial Confucian policy.

Empedocles of Acragas

494 BCE – 434 BCE

Acragas (Agrigentum, Sicily)

Siceliote Greek poet-philosopher from Acragas who explained nature through four roots and the cosmic powers of Love and Strife while joining cosmology, medicine, ethics, and purification religion.

Epictetus

50 CE – 135 CE

Hierapolis, Phrygia

Formerly enslaved Stoic teacher from Hierapolis and Nicopolis whose recorded classroom teaching made prohairesis, disciplined assent, providence, and inner freedom central to Roman Stoicism.

Epicurus of Samos

341 BCE – 270 BCE

Samos

Greek philosopher from Samos whose Garden school joined atomist physics, a canon of sensation and feeling, and an ethics of pleasure understood as freedom from bodily pain and mental disturbance.

Euclid of Megara

435 BCE – 365 BCE

Megara

Socratic philosopher from Megara who joined Socratic concern for the good to Eleatic unity and founded the Megarian school of dialectical argument.

Eudemus of Rhodes

370 BCE – 300 BCE

Rhodes (island)

Peripatetic philosopher from Rhodes, pupil of Aristotle and companion of Theophrastus, remembered for systematizing Aristotelian logic and physics and for pioneering histories of Greek geometry, arithmetic, and astronomy.

Eudoxus of Cnidus

390 BCE – 340 BCE

Cnidus, Caria

Mathematician, astronomer, geographer, and philosopher from Cnidus, remembered for proportion theory, homocentric-sphere astronomy, geography, calendrical work, and the ancient testimony about pleasure as the natural good.

Gārgī Vācaknavī

700 BCE – 600 BCE

Videha / Mithilā region

Early Upanishadic woman philosopher from the Videha-Mithilā setting whose public questions to Yājñavalkya press inquiry toward the imperishable ground of world, speech, and knowledge.

Gautama (Akṣapāda)

200 BCE – 100 BCE

Indo-Gangetic region / early Nyāya milieu

Early Nyāya philosopher traditionally credited with the Nyāya Sūtra, whose analytic program systematized inference, debate, valid knowledge, realist categories, self, error, and liberation.

Gautama (Rāhūgaṇa)

1500 BCE – 1200 BCE

Indo-Gangetic / early Vedic region

Rigvedic seer associated with the Gotama Rāhūgaṇa hymn block, whose transmitted hymns join praise, sacrifice, speech, divine agency, kingship, auspicious life, and cosmic order.

Gongsun Long

325 BCE – 250 BCE

Zhao state region

Warring States School of Names philosopher of language, logic, names and actualities, white-horse paradox, hard-white distinction, reference, designation, and disputation.

Gorgias of Leontini

483 BCE – 375 BCE

Leontini (Sicily)

Siceliote Greek sophist and rhetorician from Leontini whose paradoxes about being, knowledge, and communication, and whose display speeches on Helen and Palamedes, made logos, persuasion, belief, and civic speech central problems for philosophy.

Gregory of Nazianzus

329 CE – 390 CE

Nazianzus (Cappadocia)

Cappadocian Greek theologian, orator, poet, and philosopher whose Theological Orations, Trinitarian distinctions, apophatic restraint, Christological letters, and rhetorical art shaped Nicene metaphysics, philosophy of religion, theological language, ethics, and aesthetics.

Gregory of Nyssa

335 CE – 395 CE

Nyssa (Cappadocia)

Cappadocian Greek bishop and philosopher-theologian whose accounts of divine infinity, epektasis, apophatic knowledge, soul-body anthropology, creation, and theological language shaped Christian Platonism, philosophy of religion, metaphysics, mind, science, and aesthetics.

Gṛtsamada

1280 BCE – 1200 BCE

Indo-Gangetic region (Vedic tradition)

Rigvedic seer associated chiefly with the Mandala 2 hymn family, where sacred speech, rta, ritual knowledge, poetic form, and Vedic cosmology meet inside early Indian religious-philosophical reflection.

Guo Xiang

252 CE – 312 CE

Henan region (Western Jin)

Western Jin Daoist philosopher and Zhuangzi commentator whose reading of spontaneous self-transformation, natural social roles, non-interference, and immanent order shaped the received Zhuangzi tradition.

Han Fei

280 BCE – 233 BCE

Han state (Xinzheng region)

Warring States Chinese Legalist philosopher and statesman whose Han Feizi synthesizes fa, shu, shi, xingming, rewards and punishments, human motivation, and impersonal standards into a classic theory of state power.

He Yan

190 CE – 249 CE

Nanyang Commandery, Henan region

Cao Wei scholar-official and xuanxue philosopher whose Lunyu jijie, Daolun, and Wuming lun connect Analects commentary, wu and namelessness, qingtan, governance by wuwei, and the emotionless-sage debate.

Heraclitus of Ephesus

535 BCE – 475 BCE

Ephesus, Ionia

Ionian Greek Presocratic philosopher from Ephesus whose fragments on logos, flux, fire, unity of opposites, measure, self-knowledge, law, soul, and hidden harmony helped shape metaphysics, epistemology, logic, language, natural philosophy, religion, and later process thought.

Hermarchus of Mytilene

325 BCE – 250 BCE

Mytilene, Lesbos

Epicurean scholarch from Mytilene, pupil and successor of Epicurus, whose lost works and fragments preserve early Garden arguments on nature, law, justice, mathematics, rival schools, and the critique of fear-based religion.

Hippias of Elis

460 BCE – 400 BCE

Elis, Peloponnese

Elean Greek sophist, polymath, diplomat, and mathematician associated with natural law, encyclopedic learning, memory, language, beauty, Olympic chronology, and the quadratrix.

Hui Shi

380 BCE – 305 BCE

State of Song, probably the Shangqiu/Henan region

Warring States Chinese School of Names philosopher, disputer, and statesman whose lost Huizi tradition, Ten Theses, law-code story, and Zhuangzi dialogues shaped later debates about names, actualities, identity, difference, space, time, perspective, and public standards.

Huiyuan

334 CE – 416 CE

Loufan, Yanmen Commandery, Bingzhou, near modern Ningwu County, Shanxi

Eastern Jin Chinese Buddhist scholastic monk associated with Mount Lu, Donglin Temple, early Chinese Pure Land devotion, Prajnaparamita interpretation, karmic retribution, monastic autonomy from royal ritual, and the correspondence with Kumārajīva.

Iamblichus of Chalcis

245 CE – 325 CE

Chalcis ad Belum, Coele-Syria, probably near modern Qinnasrin

Syrian Greek Neoplatonist of Chalcis whose theurgy, Pythagorean curriculum, Platonic commentary, mathematics, soul theory, metaphysics, and philosophy of religion shaped later Syrian and Athenian Neoplatonism.

Īśvarakṛṣṇa

350 CE – 425 CE

probably northern India; exact birthplace unknown

Classical Indian Sāṃkhya philosopher credited with the Sāṃkhyakārikā, a compact verse synthesis of prakṛti, puruṣa, guṇas, pramāṇas, causation, mind, bondage, suffering, and liberation through discriminative knowledge.

Jaimini

350 BCE – 300 BCE

Indo-Gangetic region, exact birthplace unknown

Early Indian Mīmāṃsā philosopher credited with the Mīmāṃsā Sūtra, a foundational sūtra text on dharma, Vedic injunction, authorless scripture, ritual action, pramāṇa, śabda, and the interpretation of sacred language.

Kaṇāda (Ulūka)

100 CE – 200 CE

probably northern India or the Indo-Gangetic region; exact birthplace unknown

Early Vaiśeṣika philosopher traditionally credited with the Vaiśeṣika Sūtra, where atomism, substances, qualities, motion, universals, inherence, dharma, and liberation are organized into a realist category system.

Kaṇva

1200 BCE – 1100 BCE

probably northern India or the Ganges-Yamuna/Mālinī river tradition; exact birthplace unknown

Vedic rishi and Kaṇva lineage figure associated with Rigvedic hymnody, sacred speech, ritual praise, Kāṇva transmission, and the Śakuntalā āśrama tradition.

Kapila

700 BCE – 600 BCE

probably northern India or the Indo-Gangetic region; exact birthplace unknown

Legendary early Sāṃkhya founder associated with puruṣa, prakṛti, guṇas, discriminative knowledge, liberation, and later Sāṃkhya-pravacana transmission.

Kumārajīva

344 CE – 413 CE

Kucha (Kuqa), Tarim Basin

Kuchean Buddhist translator whose Chang'an translation bureau carried Prajñāpāramitā, Madhyamaka, Lotus, Vimalakīrti, Pure Land, and meditation texts into durable Chinese Buddhist philosophical language.

Kutsa Āṅgirasa

1200 BCE – 1100 BCE

Indo-Gangetic region, exact birthplace unknown

Vedic rishi and Āṅgirasa lineage figure associated with Rigvedic Indra hymnody, sacred speech, ritual praise, śruti transmission, and early Hindu religious philosophy.

Laozi

600 BCE – 501 BCE

traditionally Ku County, state of Chu, near modern Luyi, Henan; historicity uncertain

Legendary early Daoist figure associated with the Daodejing, Dao, de, wuwei, ziran, simplicity, anti-coercive rule, and later religious Daoist veneration as Taishang Laojun.

Leucippus of Abdera

500 BCE – 430 BCE

Abdera, Thrace; birthplace uncertain in ancient sources

Presocratic atomist associated with Abdera whose lost works and ancient testimonia explain nature through atoms, void, motion, and necessity.

Li Si

280 BCE – 208 BCE

Shangcai, State of Chu, now Henan

Qin Legalist statesman whose memorials, centralized statecraft, and script-standardization work helped form the administrative language of the first Chinese empire.

Lucretius (Titus Lucretius Carus)

99 BCE – 55 BCE

Rome or Roman Italy, probably Rome; exact birthplace uncertain

Roman Epicurean poet-philosopher whose De rerum natura carries atomism, naturalistic explanation, mortal mind, and the critique of superstition into Latin didactic poetry.

Mahāvīra (Vardhamāna)

599 BCE – 527 BCE

Kuṇḍagrāma near Vaiśālī, Vajji; traditional birthplace

Jain śramaṇa teacher and final tīrthaṅkara associated with ahiṃsā, anekāntavāda, aparigraha, ascetic liberation, kevala-jñāna, and the Jain Āgama teaching tradition.

Maitreyī

800 BCE – 700 BCE

Videha / Mithilā region; Upanishadic setting, exact birthplace unknown

Early Upanishadic woman philosopher whose dialogues with Yājñavalkya ask whether wealth can secure immortality and redirect inquiry toward ātman, self-knowledge, and renunciation.

Makkhali Gośāla

520 BCE – 460 BCE

Śrāvastī region; traditional setting and exact birthplace uncertain

Ancient Indian Ājīvika teacher remembered for niyati, a radical doctrine of fate and fixed transmigration reconstructed from Buddhist and Jain hostile-source evidence.

Marcus Aurelius

121 CE – 180 CE

Rome

Roman emperor and Stoic philosopher whose Meditations turns imperial duty, mortality, providence, reason, self-command, and social obligation into private exercises in ethical attention.

Melissus of Samos

500 BCE – 430 BCE

Samos

Samian Presocratic and Eleatic philosopher whose lost treatise argues for one unlimited, changeless being and denies void, motion, generation, and destruction.

Mencius (Mengzi)

372 BCE – 289 BCE

Zou, State of Lu

Classical Confucian philosopher whose account of xingshan, the four sprouts, ren, yi, moral cultivation, benevolent government, and people-centered legitimacy shaped East Asian ethics and political thought.

Metrodorus of Lampsacus

331 BCE – 278 BCE

Lampsacus, Hellespont

Epicurean philosopher of the Garden whose lost works joined ethics, sensation, atomism, anti-dialectic polemic, friendship, bodily goods, and loyalty to Epicurus.

Mozi (Mo Di)

470 BCE – 391 BCE

State of Lu or State of Song, Warring States China

Warring States philosopher of Mohism, jian ai, impartial care, anti-aggression, meritocracy, frugality, Heaven, ghosts, standards, logic, optics, and siege defense.

Nagarjuna

150 CE – 250 CE

South India, often associated with Andhra

Madhyamaka Buddhist philosopher of emptiness, dependent origination, two truths, svabhava critique, catuskoti, Middle Way reasoning, and Prajnaparamita reception.

Origen of Alexandria

185 CE – 254 CE

Alexandria, Egypt

Alexandrian Christian Platonist of allegorical exegesis, Logos theology, free will, apokatastasis controversy, Scripture scholarship, Hexapla, and Contra Celsum.

Parmenides of Elea

515 BCE – 450 BCE

Elea, Magna Graecia

Eleatic philosopher of Being, the Way of Truth, the Way of Opinion, denial of not-being, monism, necessity, cosmology, and fragmentary poetic transmission.

Patanjali

350 CE – 450 CE

India

Classical Yoga philosopher of the Yoga Sutras, citta-vritti-nirodha, purusha, prakriti, kleshas, karma, samadhi, kaivalya, Ishvara, and eight-limbed practice.

Phaedo of Elis

417 BCE – 345 BCE

Elis (Peloponnese)

Socratic philosopher from Elis, witness to Socrates' death, founder of the Elean school, and author of lost Socratic dialogues on dialectic, ethics, character, and philosophical conversation.

Philip of Opus

380 BCE – 330 BCE

Opus (Locris)

Early Academic philosopher of Opus, Plato's Academy, mathematical astronomy, Epinomis, astral theology, Opuntian Locris, and the reported arrangement of Plato's Laws.

Philodemus of Gadara

110 BCE – 35 BCE

Gadara (Decapolis)

Epicurean philosopher and poet from Gadara whose Herculaneum papyri preserve work on rhetoric, poetry, music, sign inference, piety, death, frank criticism, passions, vices, and Epicurean book culture.

Plato

427 BCE – 347 BCE

Athens

Athenian philosopher of Forms, dialectic, recollection, the Good, tripartite soul, philosopher-rule, eros, rhetoric, language, cosmology, theology, the Academy, and the Platonic corpus.

Plotinus

204 CE – 270 CE

Lycopolis (Upper Egypt)

Neoplatonic philosopher of the One, Intellect, Soul, emanation, return, henosis, beauty, evil as privation, contemplative ethics, anti-Gnostic polemic, and the Porphyrian Enneads.

Plutarch of Chaeronea

46 CE – 120 CE

Chaeronea (Boeotia)

Middle Platonist moralist, biographer, and priest of Apollo at Delphi whose Parallel Lives and Moralia join virtue ethics, political counsel, religious Platonism, moral psychology, and literary biography.

Porphyry

234 CE – 305 CE

Tyre (Phoenicia)

Neoplatonic philosopher of Tyre, logic, the Isagoge, predicables, universals, Porphyrian Tree, soul purification, vegetarian ethics, Homeric allegory, Aristotle commentary, and anti-Christian polemic.

Posidonius of Apamea

135 BCE – 51 BCE

Apamea (Orontes)

Middle Stoic philosopher of Apamea and Rhodes, cosmic sympathy, fate, divination, passions, Stoic physics, geography, tides, Canopus, earth measurement, meteorology, history, and Roman reception.

Prajapati

1200 BCE – 800 BCE

Indo-Gangetic Plain (Vedic tradition)

Vedic creator figure and lord of creatures whose profile joins Hiranyagarbha, Prajapati, tapas, Vac, yajna, sacrifice as creation, Brahmana ritual cosmology, Daksha, Brahma identification, and later Hindu reception.

Prasastapada

530 CE – 560 CE

Indo-Gangetic region (Vaisheshika scholasticism)

Vaisheshika scholastic philosopher of Padartha Dharma Sangraha, Prasastapada Bhashya, padartha taxonomy, substance, quality, motion, universal, particularity, inherence, pramana, atomism, and Nyaya-Vaisheshika realism.

Proclus of Lycia

412 CE – 485 CE

Xanthus (Lycia)

Late antique Neoplatonic scholarch of Athens whose work systematized the One, henads, procession, reversion, intellect, soul, theurgy, mathematics, astronomy, Plato commentary, and later Pseudo-Dionysian and Liber de Causis reception.

Prodicus of Ceos

465 BCE – 395 BCE

Ceos (Kea, island)

Cean sophist of language, semantic precision, synonym distinctions, moral choice, the Choice of Heracles, naturalistic theology, civic rhetoric, and Socrates' reported debt to Prodicus on names.

Protagoras of Abdera

490 BCE – 420 BCE

Abdera, Thrace

Abderite sophist of man-measure relativism, appearances, antilogy, weaker and stronger arguments, orthoepeia, civic virtue, democratic political teaching, On the Gods, and fragmentary testimonial transmission.

Purana Kassapa

560 BCE – 480 BCE

Magadha region

Early Indian sramana teacher remembered for akiriyavada, denial of the moral efficacy of action, Magadhan debate culture, the six teachers, and the Samannaphala Sutta report.

Pyrrho of Elis

360 BCE – 270 BCE

Elis, Peloponnese

Greek skeptic from Elis whose transmitted way of life joins epoche, aphasia, ataraxia, appearances, non-assertion, Anaxarchus, eastern travel traditions, Timon, Aenesidemus, Sextus Empiricus, and the Pyrrhonian challenge to dogmatic knowledge.

Pythagoras of Samos

570 BCE – 495 BCE

Samos

Samian founder of the Pythagorean way of life whose testimonial profile joins number metaphysics, harmony, tetractys, metempsychosis, purification, communal discipline, Croton, Samos, mathematics, harmonics, and later ancient reception.

Raikva

750 BCE – 700 BCE

Indo-Gangetic region

Upanishadic sage of the Chandogya Upanishad whose Samvarga Vidya joins Janasruti, humility before knowledge, the cart-man motif, Vayu as cosmic absorber, Prana as bodily absorber, food and eater imagery, and Vedic transmission.

Śabara Svāmin

100 BCE – 1 BCE

Indian subcontinent, exact birthplace unknown

Early Mīmāṃsā commentator whose Śabara Bhāṣya shaped Indian philosophy of language and religion through its analysis of Vedic injunction, dharma, śabda, pramāṇa, ritual action, and scriptural authority.

Sanatkumāra

700 BCE – 600 BCE

Indo-Gangetic region (symbolic / cosmic teacher)

Upanishadic teacher of Nārada whose Chāndogya dialogue links language, knowledge, sorrow, and bhūman, the infinite fullness beyond finite disciplines.

Sañjaya Belaṭṭhiputta

520 BCE – 450 BCE

Magadha region

Early Indian skeptic associated with Ajñāna and the Sāmaññaphala Sutta, where his remembered replies model suspension of judgment and metaphysical non-commitment.

Satyakāma Jābāla

700 BCE – 600 BCE

Indo-Gangetic region (Pañcāla tradition)

Upanishadic figure whose Chandogya episode treats truthful self-disclosure as the sign of spiritual fitness and a gateway into instruction about Brahman.

Seneca the Younger

4 CE – 65 CE

Corduba (Cordoba, Hispania)

Roman Stoic philosopher from Corduba whose letters, essays, and natural questions made virtue, anger, time, clemency, and self-command enduring topics in Latin philosophy.

Sengzhao

384 CE – 414 CE

Jingzhao (Chang'an region)

Chinese Buddhist philosopher from Jingzhao whose Zhaolun essays shaped early Chinese Madhyamaka through emptiness, nonduality, non-knowing wisdom, language, and nameless nirvana.

Sextus Empiricus

160 CE – 210 CE

Alexandria (probable)

Greek Pyrrhonian skeptic from Alexandria (probable) whose works preserve ancient arguments about suspension, signs, proof, criteria, and life without dogmatic certainty.

Shang Yang

390 BCE – 338 BCE

Wei state region

Chinese Legalist reformer whose Qin reforms and attributed Book of Lord Shang shaped early theories of law, state power, rewards, punishments, agriculture, and war.

Siddhārtha Gautama

563 BCE – 483 BCE

Lumbinī

Founder of Buddhism whose transmitted early discourses frame suffering, liberation, dependent arising, not-self, mindfulness, ethics, and the Middle Way.

Sima Qian

145 BCE – 86 BCE

Longmen (near present-day Hancheng)

Western Han historian and thinker whose Shiji joined ethical judgment, political memory, narrative biography, source criticism, cosmology, and historical method.

Simon the Shoemaker

470 BCE – 399 BCE

Athens (Attica)

Athenian Socratic shoemaker remembered for workshop conversations, craft ethics, free speech, and a lost one-volume set of shoemaker dialogues.

Socrates

470 BCE – 399 BCE

Alopece, Athens

Ancient Athenian philosopher whose public examination, care of the soul, ethical courage, piety inquiry, and trial shaped the Socratic tradition and classical philosophy.

Speusippus of Athens

408 BCE – 339 BCE

Athens (Attica)

Old Academy philosopher, Plato's nephew, and successor as scholarch, whose lost titles and testimonia join first principles, classification, genera, species, number, soul, ethics, politics, definitions, and Academy succession.

Thales of Miletus

624 BCE – 546 BCE

Miletus, Ionia

Milesian natural philosopher and sage of water as arche, earth on water, natural explanation, astronomy, geometry, eclipse tradition, magnet/soul testimony, and Seven Sages reception.

Theophrastus of Eresus

371 BCE – 287 BCE

Eresos, Lesbos

Peripatetic philosopher from Eresos, Aristotle successor at the Lyceum, botanical classifier, natural scientist, logician, rhetorician, character writer, and major doxographical source for earlier Greek philosophy.

Timon of Phlius

320 BCE – 230 BCE

Phlius (Peloponnese)

Greek Pyrrhonist philosopher and satirical poet from Phlius whose Silloi, Indalmoi, and prose works preserved Pyrrho's skeptical ideal while attacking dogmatic philosophers.

Uddālaka Āruṇi

750 BCE – 700 BCE

Kuru-Panchala region

Early Upanishadic teacher of Shvetaketu whose Chandogya teaching joins sat, Atman, subtle essence, visible-to-invisible analogy, tat tvam asi, and later Vedanta reception.

Vasiṣṭha

1270 BCE – 1200 BCE

Rigvedic Bharata-Sudās priestly milieu; Sarasvatī-Paruṣṇī/Punjab horizon, exact birthplace unknown

Rigvedic rishi of the Bharata-Sudās priestly horizon whose Mandala 7 hymn blocks make mantra, sacred speech, Varuṇa theology, Sarasvatī, ṛta, yajña, and divine-human mediation central to early Vedic ritual philosophy.

Vasubandhu

316 CE – 396 CE

Puruṣapura, Gandhāra; modern Peshawar region

Gandhāran Buddhist philosopher whose Abhidharma analysis, Yogācāra consciousness-only arguments, Buddhist logic, karma theory, and Mahāyāna commentary shaped Indian, Tibetan, and East Asian scholastic philosophy.

Vātsyāyana

390 CE – 460 CE

Indo-Gangetic scholastic milieu; exact birthplace unknown

Classical Nyāya commentator identified with the Nyāyabhāṣya, whose analysis of pramāṇa, debate, inference, testimony, self, and liberation made Sanskrit logical inquiry central to Indian philosophy.

Viśvāmitra

1265 BCE – 1195 BCE

Rigvedic Bharata-Kuśika milieu; Vipāś-Śutudrī/Sarasvatī-Punjab horizon, exact birthplace unknown

Rigvedic rishi of the Bharata-Kuśika horizon whose Mandala 3 hymn blocks make mantra, sacred speech, ṛta, yajña, tapas, and divine-human mediation central to early Vedic ritual philosophy.

Wang Bi

226 CE – 249 CE

Shanyang Commandery, Cao Wei; exact site/source wording varies

Cao Wei philosopher of xuanxue whose Laozi and Zhouyi commentaries made nonbeing, Dao, principle, words, images, and meaning central to early medieval Chinese metaphysics and canonical interpretation.

Xenocrates of Chalcedon

396 BCE – 314 BCE

Chalcedon, Bithynia; now Kadikoy, Istanbul

Greek Academic philosopher who systematized Plato through formal numbers, the One and Indeterminate Dyad, demonology, and the tripartite division of philosophy.

Xenophanes of Colophon

570 BCE – 478 BCE

Colophon, Ionia; near modern Izmir Province, Turkey

Ionian Greek poet-philosopher whose fragments criticize anthropomorphic gods, defend rational theology, and pair naturalistic explanation with epistemic humility.

Xenophon of Athens

430 BCE – 354 BCE

Athens, Attica; Erchia deme tradition noted

Cistercian monk, abbot of Socratic, and medieval Christian philosopher-theologian whose theology of love, humility, grace, free choice, mystical ascent, monastic ethics, scriptural exegesis, and ecclesial counsel shaped scholastic, monastic, and political theology.

Xunzi

313 BCE – 238 BCE

State of Zhao, north-central China; exact birthplace uncertain

Late Warring States Confucian philosopher whose received Xunzi corpus argues that learning, ritual, music, names, cultivated artifice, and institutions transform unruly human tendencies into moral and political order.

Yājñavalkya

760 BCE – 685 BCE

Videha / Mithilā region; Upanishadic setting, exact birthplace unknown

Late Vedic and early Upanishadic philosopher remembered for Śukla Yajurveda transmission, Bṛhadāraṇyaka debates with Janaka, Gārgī, and Maitreyī, and teachings on ātman, Brahman, renunciation, and dharma.

Zeno of Citium

334 BCE – 262 BCE

Citium / Kition, Cyprus; Greek city with Phoenician colony context

Cistercian monk, abbot of Stoic, and medieval Christian philosopher-theologian whose theology of love, humility, grace, free choice, mystical ascent, monastic ethics, scriptural exegesis, and ecclesial counsel shaped scholastic, monastic, and political theology.

Zeno of Elea

490 BCE – 430 BCE

Elea (Velia), Lucania, Magna Graecia; now Campania, Italy

Cistercian monk, abbot of Eleatic, and medieval Christian philosopher-theologian whose theology of love, humility, grace, free choice, mystical ascent, monastic ethics, scriptural exegesis, and ecclesial counsel shaped scholastic, monastic, and political theology.

Zhi Qian

193 CE – 252 CE

Luoyang, Eastern Han China; later active at Jianye under Eastern Wu

Three Kingdoms Buddhist translator of Yuezhi ancestry whose Chinese renderings of Prajnaparamita, Vimalakirti, Pure Land, verse, and narrative scriptures shaped early Chinese Mahayana vocabulary and reception.

Zhuangzi

369 BCE – 286 BCE

Meng, state of Song, now near Shangqiu, Henan; exact site uncertain

Warring States Daoist philosopher whose received Zhuangzi tradition uses parable, skepticism, transformation, spontaneity, and perspectival reasoning to loosen fixed distinctions and reorient life toward wandering with dao.