Where does “fīlum” come from?

fīlum (Latin) comes from Proto-Italic fī(s)lom, from Proto-Indo-European gʷʰiH-(s-)lo-.

Ancestry of “fīlum”, step by step

Step	Language	Word	Meaning
1	Proto-Italic	fī(s)lom	—
2	Proto-Indo-European	gʷʰiH-(s-)lo-	—

fīlum — Etymology, Origin & Word History | Etymology Explorer