Where does “Fiona” come from?

Fiona is an English feminine given name derived from Irish Fionn, from Old Irish finn, ultimately from Proto-Indo-European weyd- meaning "to see," via Proto-Celtic windos.

Ancestry of “Fiona”, step by step

Step	Language	Word	Meaning
1	Irish	Fionn	—
2	Old Irish	find	—
3	Proto-Celtic	Kʷennowindos	—
4	Proto-Celtic	windos	white
5	Proto-Indo-European	windo-	—
6	Proto-Indo-European	weyd-	to see

Every word from Proto-Indo-European weyd- →

Fiona — Etymology, Origin & Word History | Etymology Explorer