Where does “Favonius” come from?

Favonius (Latin) comes from Latin faveō, from Proto-Indo-European gʰoweh₁ — to notice.

Ancestry of “Favonius”, step by step

Step	Language	Word	Meaning
1	Latin	faveō	—
2	Proto-Indo-European	gʰoweh₁	to notice

Favonius — Etymology, Origin & Word History | Etymology Explorer