Where does “Angvilo” come from?

Angvilo (Esperanto) comes from English anguilla, from Latin anguilla, from Proto-Italic *anɣʷis, from Proto-Indo-European h₂éngʷʰis — snake.

Ancestry of “Angvilo”, step by step

Step	Language	Word	Meaning
1	English	anguilla	—
2	Latin	anguilla	eel; small snake; vocative singular of anguilla
3	Proto-Italic	*anɣʷis	—
4	Proto-Indo-European	h₂éngʷʰis	snake

Angvilo — Etymology, Origin & Word History | Etymology Explorer