Snaskrit nāga means 'snake' generically or 'cobra' specifically and nāgi is the feminine form. I have a colleague who is from Nāgapur 'snake town': pura 'fortress, castle, city, town' (as in Siṃhapura 'lion town', siṃha 'lion' > Malay singa) is cognate with Greek πολις (polis as in Neapolis 'Naples' i.e., New Town).

Ceci n'est pas un seing.