Where does “Arwyn” come from?

Arwyn (Welsh) comes from Welsh gwyn, from Proto-Brythonic gwɨnn, from Proto-Celtic windos, from Proto-Indo-European windo-, from Proto-Indo-European weyd- — to see.

Arwyn (Welsh): {{cite-book

Definitions

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Ancestry of “Arwyn”, step by step

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