Where does “glaswyn” come from?

glaswyn (Cornish) comes from Cornish gwynn, from Old Cornish guyn, from Proto-Brythonic gwɨnn, from Proto-Celtic windos, from Proto-Indo-European windo-, from Proto-Indo-European weyd- — to see.

glaswyn (Cornish): light blue, sky blue

Definitions

  1. light blue, sky blue

Ancestry of “glaswyn”, step by step

glaswyn traces back through two separate lines of ancestry.

via Cornish gwynn

StepLanguageWordMeaning
1Cornishgwynnwhite; fair; blessed
2Old Cornishguyn
3Proto-Brythonicgwɨnnwhite
4Proto-Celticwindoswhite
5Proto-Indo-Europeanwindo-
6Proto-Indo-Europeanweyd-to see

via Cornish glas

StepLanguageWordMeaning
1Cornishglasblue; green; grey
2Proto-Brythonicglasgreen, blue
3Proto-Celticglastosgreen, blue
4Proto-Indo-Europeanǵʰl̥h₃stós
5Proto-Indo-Europeanǵʰelh₃-to flourish; green, yellow
Every word from Proto-Indo-European weyd-Every word from Proto-Indo-European windo-Every word from Proto-Celtic windos