Where does “Arwen” come from?

Arwen (Welsh) comes from Welsh gwên, from Proto-Celtic windos, from Proto-Indo-European windo-, from Proto-Indo-European weyd- — to see.

Arwen (Welsh): {{cite-book

Definitions

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Ancestry of “Arwen”, step by step

StepLanguageWordMeaning
1Welshgwênsmile
2Proto-Celticwindoswhite
3Proto-Indo-Europeanwindo-—
4Proto-Indo-Europeanweyd-to see
Every word from Proto-Indo-European weyd- →Every word from Proto-Indo-European windo- →Every word from Proto-Celtic windos →