Latin word nam comes from Proto-Indo-European *h₁énos (That, that over there, yon (distal).)

Detailed word origin of nam

Dictionary entry	Language	Definition
*h₁énos	Proto-Indo-European (ine-pro)	That, that over there, yon (distal).
nam	Latin (lat)	Actually. Because. For. Thus.
*h₁enos	Proto-Indo-European (ine-pro)	that

Words with the same origin as nam