Where does “Nappinnai” come from?

Nappinnai (English) comes from Tamil நப்பின்னை, from Tamil ந, from Old Tamil 𑀦𑀻, from Proto-Dravidian nīn — you.

Ancestry of “Nappinnai”, step by step

StepLanguageWordMeaning
1Tamilநப்பின்னைNappinnai, Niladevi
2TamilநA consonantal letter of the Tamil script
3Old Tamil𑀦𑀻you
4Proto-Dravidiannīnyou
Every word from Proto-Dravidian nīn →Every word from Old Tamil 𑀦𑀻 →Every word from Tamil ந →