Where does “Tamil Nadu” come from?

Tamil Nadu (Portuguese) comes from English Tamil Nadu, from Tamil தமிழ்நாடு, from Tamil தமிழ், from Old Tamil 𑀢𑀫𑀺𑀵𑁰 — Tamil.

Ancestry of “Tamil Nadu”, step by step

StepLanguageWordMeaning
1EnglishTamil Nadu—
2Tamilதமிழ்நாடுthe Tamil speaking lands as a whole
3Tamilதமிழ்Tamil
4Old Tamil𑀢𑀫𑀺𑀵𑁰Tamil
Every word from Old Tamil 𑀢𑀫𑀺𑀵𑁰 →Every word from Tamil தமிழ் →Every word from Tamil தமிழ்நாடு →