Evidence page · sky vocabulary not derived from Sanskrit
A complete sky vocabulary, a landscape-based time system, a hereditary non-Brahmin astronomer caste, and one undeciphered script that may or may not name the Pleiades. Sorted by what the evidence actually carries.
Not derived from Sanskrit
| Tamil | Sense | Note |
|---|---|---|
| mīn | fish · star | One form, both senses. Shared with Malayalam and Telugu. The hinge of everything below. |
| aṟu-mīn | six stars | the Pleiades |
| ēḻu-mīn | seven stars | Ursa Major / Saptarṣi |
| vaṭa-mīn | north star | Polaris |
| ñāyiṟu | sun | also Sunday |
| tiṅkaḷ | moon · month | also Monday. The Tamil word for month is the word for moon. |
| veḷḷi | Venus · silver · white | also Friday. Named for its colour. |
| kōḷ | planet | “the seizer” — semantically identical to Sanskrit graha, also “seizer”. Direction of influence open. |
| nāḷ | day · asterism | Like mīn, one word for two things: a day, and the lunar mansion governing it. |
| nāḻikai | time unit, c. 24 min | from nāḻi, a measure — time reckoned by volume, as in a water clock |
| vāṉam · poḻutu | sky · a period of time |
Four Tamil weekday names are native descriptions; three are Sanskrit imports. The split is exactly where you would predict it.
| Day | Tamil | Source |
|---|---|---|
| Sunday | ñāyiṟu | Tamil — the sun |
| Monday | tiṅkaḷ | Tamil — the moon |
| Tuesday | cevvāy | Tamil — “red mouth”, for Mars |
| Wednesday | putaṉ | Sanskrit Budha |
| Thursday | viyāḻaṉ | Sanskrit |
| Friday | veḷḷi | Tamil — “the white/silver one”, for Venus |
| Saturday | caṉi | Sanskrit Śani |
The bodies visible and nameable by eye — sun, moon, Mars, Venus — have Tamil names. Mercury, Jupiter and Saturn, which require sustained tracking to identify as planets, carry Sanskrit ones. And the seven-day planetary week itself is a Hellenistic structure absent from Vedic literature — so the Tamil names were fitted into an imported frame, using words that already existed.
Sangam poetics · c. 100 BCE – 300 CE
Classical Tamil poetry organises the world into five tiṇai — landscape types — and each carries its own season and its own hour, alongside a mood. Time is not an abstract grid here; it is a property of place.
| Tiṇai | Landscape | Season | Hour |
|---|---|---|---|
| kuṟiñci | mountains | cold / dewy | midnight |
| mullai | forest, pasture | rains | evening |
| marutam | farmland | all | just before dawn |
| neytal | coast | all | sunset |
| pālai | parched land | summer | midday |
This has no parallel in Sanskrit poetics of the period. It is an independent system for coordinating place, season and time of day — and it is astronomical in the practical sense that matters to farmers and sailors, without being predictive astrology at all.
Tamil kaṇi means to reckon or compute; kaṇiyaṉ is one who reckons — the word for astronomer and astrologer.
The author of Puṟanāṉūṟu 192 — among the most quoted lines in Tamil, beginning with the declaration that every town is one's own and everyone one's kin — is Kaṇiyan Pūṅkuṉṟaṉār. His name identifies him as an astronomer.
And the profession stayed a caste. In Kerala the hereditary astrologers are the Kaṇiyan / Kaṇisan community, and in Tamil country the Kaṇiyaṉ — non-Brahmin, hereditary, and holding the calendrical and horoscopic function in village life. The reckoning of time was not a priestly monopoly in the south.
Unproven · and specific enough to be testable
The fish sign is among the most frequent in the Indus script, and appears with modifiers — strokes, a roof, a crossing mark.
Parpola's rebus: if the script encodes Dravidian, the fish reads mīn, which also means star. Modified fish signs would then be star names — six-fish for the Pleiades, seven-fish for Ursa Major — matching aṟumīn and ēḻumīn in later Tamil. Mahadevan argued on parallel lines. Parpola further connects the seal iconography showing seven figures in a row to the seven-star and seven-mother traditions.
It does not rest on resemblance. It rests on a homophony in a living language of the region.
The script is undeciphered. The average inscription runs about five signs. There is no bilingual, and a rebus reading cannot be confirmed without one. Farmer, Sproat and Witzel have argued the signs are not writing at all — a position itself contested.
Unproven, and considerably better than nothing. Claims that Tamil astronomy is demonstrably Indus-derived, or many thousands of years old, go beyond this evidence and should not be made. The argument's strength is that it predicts a pattern rather than being fitted to one.
What can be traced
Cave inscriptions across the Tamil country, and Tamil-Brahmi potsherds in Sri Lanka (including at Tissamahārāma) and on the Red Sea coast at Quseir al-Qadim and Berenike, and at Khor Rori in Oman. Tamil-speaking populations were mobile, literate and maritime in this period — the physical precondition for any transmission of sky knowledge.
The tiṇai system; star and eclipse references in the anthologies; the month names derived from lunar mansions that Tamil still uses — Cittirai from Citrā, Kārttikai from Kṛttikā, Mārkaḻi from Mṛgaśīrṣa. Ten of twelve months are named for nakṣatras, not for zodiac signs.
Through Sanskrit, into a region that already had a lunar calendar. It supplied the chart — signs, houses, aspects, ascendant. It did not replace the nakṣatra layer; it was laid on top of it.
Jaimini methods — sign-based aspects, kārakas, chara daśās — strongest in the Telugu country. Nāḍī astrology, palm-leaf and thumbprint-indexed, specifically Tamil and centred on Vaitheeswaran Koil, attributed to Agastya and the Siddhars. Praśna — horary — most developed in Kerala, whose principal text Praśna Mārga dates to 1649. The north meanwhile absorbed Perso-Arabic Tājika; the south largely did not.
Mādhava of Saṅgamagrāma and successors derive infinite series for π, sine and cosine — results Europe reached two to three centuries later. The Yuktibhāṣā is written in Malayalam, not Sanskrit. Whether any of it reached Europe is argued; that it was done first is not.
Sinhala nekat — auspicious timing — is nakṣatra, and governs the Aluth Avurudda new year: the sun's transit from Mīna into Meṣa, timed to the minute by astrologers. Sinhala and Tamil new year are the same astronomical event, computed the same way, on the same sidereal basis. Sri Lankan practice conventionally uses the South Indian square chart.
K. S. Krishnamurti's Tamil system subdivides each nakṣatra by the Vimśottarī proportions to produce sub-lords, and reads the chart primarily through them. A modern Tamil innovation that goes further into the older attested layer rather than the imported one.
An Dravidian sky vocabulary, including star-group names built on mīn. An independent landscape-time system in Sangam poetics. A hereditary non-Brahmin astronomer caste holding the calendrical function. A lunar-mansion calendar that still supplies the Tamil months and both Sri Lankan new years. Mathematics in Malayalam that led the world.
A Dravidian horoscopic system independent of the Hellenistic one. There isn't one: signs, houses, aspects and the ascendant came through Sanskrit from Greek, and Tamil practice uses them. A demonstrated Indus origin for any of it. And any dating of Tamil astronomy in the tens of thousands of years.
The honest shape is an older attested layer, not a rival system. The older attested layer supplies the words, the calendar, the practitioners and the timing. The imported layer supplies the chart. Both are still running, and the older one is the part most people actually use — a Tamil month, a birth star, a new year computed from a sidereal transit.
This platform avoids it as a claim about origin. Something can be present, local and long-established and still have arrived earlier from somewhere else — and for most of South Asia before writing, there is no way to distinguish the two.
Where a layer is demonstrably older or demonstrably not derived from Sanskrit, the page says that instead, because it is what the evidence supports. "Of undetermined origin" is the honest label for the rest.
It is used here only in its narrow technical sense — a language that supplies loanwords and features to another that displaces it in a region. It is not a description of a people or a culture, and nothing about it implies "beneath."
Dravidian is a language family with a documented history and a large literature. Where this platform says a word is a substrate loan into Sanskrit, that is a claim about one borrowing event, not a ranking of the two traditions.