Where does “Guinevere” come from?

Guinevere derives from Welsh Gwenhwyfar, from Proto-Brythonic Gwɨnnohuɨβar containing gwɨnn from Proto-Celtic windos, ultimately from Proto-Indo-European windo-.

Ancestry of “Guinevere”, step by step

Step	Language	Word	Meaning
1	Middle English	Gwenyver	—
2	Middle Welsh	Gwenhwyfar	—
3	Old Welsh	Guinhuimar	—
4	Proto-Brythonic	Gwɨnnohuɨβar	—
5	Proto-Brythonic	gwɨnn	white
6	Proto-Celtic	windos	white
7	Proto-Indo-European	windo-	—
8	Proto-Indo-European	weyd-	to see

Every word from Proto-Indo-European weyd- →

Guinevere — Etymology, Origin & Word History | Etymology Explorer