Where does “tiṇṇaṃ” come from?

tiṇṇaṃ (Pali) comes from Sanskrit त्रि, from Proto-Indo-Aryan tráyas, from Proto-Indo-Iranian tráyas, from Proto-Indo-European *tréyes.

Ancestry of “tiṇṇaṃ”, step by step

StepLanguageWordMeaning
1Sanskritत्रिthree
2Proto-Indo-Aryantráyasthree
3Proto-Indo-Iraniantráyasthree
4Proto-Indo-European*tréyes—
Every word from Proto-Indo-European *tréyes →Every word from Proto-Indo-Iranian tráyas →Every word from Proto-Indo-Aryan tráyas →