Where does “ynsoa” come from?

ynsoa (Galician) comes from Old Portuguese insua, from Latin insula, from Latin in, from Old Latin en, from Proto-Italic en, from Proto-Indo-European h₁én — in.

Ancestry of “ynsoa”, step by step

ynsoa traces back through two separate lines of ancestry.

via Old Portuguese insua

Step	Language	Word	Meaning
1	Old Portuguese	insua	Alternative form of inssoa
2	Latin	insula	island; insula, a residential or apartment block...
3	Latin	in	in, at, on, upon, from; within, while in; into,...
4	Old Latin	en	in
5	Proto-Italic	en	in
6	Proto-Indo-European	h₁én	in

via Old Portuguese inssoa

Step	Language	Word	Meaning
1	Old Portuguese	inssoa	island
2	Latin	Īnsula	—
3	Proto-Italic	enselā	—

Words derived from “ynsoa”

insua

Every word from Proto-Indo-European h₁én →Every word from Proto-Italic en →Every word from Old Latin en →