Where does “Gwynn” come from?

Gwynn comes from Welsh gwyn, from Proto-Brythonic gwɨnn, from Proto-Celtic windos, ultimately from Proto-Indo-European weyd-, meaning to see or perceive.

Ancestry of “Gwynn”, step by step

StepLanguageWordMeaning
1EnglishGwyn—
2Welshgwynwhite; blessed
3Proto-Brythonicgwɨnnwhite
4Proto-Celticwindoswhite
5Proto-Indo-Europeanwindo-—
6Proto-Indo-Europeanweyd-to see
Every word from Proto-Indo-European weyd- →Every word from Proto-Indo-European windo- →Every word from Proto-Celtic windos →