Abu Nasr al-Farabi

872 CE – 950 CE

Farab (Otrar), Transoxiana

Persian (Farab) philosopher from Farab (Otrar) associated with metaphysics, epistemology, and logic.

Abu Rayhan al-Biruni

973 CE – 1048 CE

Kath (Khwarezm)

Khwarezmian Persian polymath whose mathematical astronomy, geodesy, chronology, comparative study of India, mineralogy, pharmacology, and scientific method shaped medieval Islamic and cross-cultural philosophy of science.

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.

Amartya Sen

1933 CE

Santiniketan (West Bengal)

Indian philosopher-economist from Santiniketan whose social-choice theory, capability approach, famine analysis, public reasoning, and theory of justice reshaped ethics, welfare economics, development, democracy, and global political philosophy.

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.

Avicenna

980 CE – 1037 CE

Afshana, near Bukhara

Persian philosopher-physician from Afshana near Bukhara whose system of metaphysics, essence/existence distinction, psychology, logic, medicine, natural philosophy, prophecy theory, and proof of the Necessary Existent shaped Islamic, Jewish, Latin scholastic, and early modern thought.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.