Where does “gwyð” come from?

gwyð (Middle Welsh) comes from Proto-Brythonic *gwuɨð, from Proto-Celtic *weidus, from Proto-Indo-European h₁weydʰh₁-, from Proto-Indo-European dwi-, from Proto-Indo-European dwóh₁ — two.

Ancestry of “gwyð”, step by step

gwyð traces back through two separate lines of ancestry.

via Proto-Brythonic *gwuɨð

StepLanguageWordMeaning
1Proto-Brythonic*gwuɨðappearance, presence, face, sight, image
2Proto-Celtic*weiduswild
3Proto-Indo-Europeanh₁weydʰh₁-to separate, divide
4Proto-Indo-Europeandwi-two; apart, asunder
5Proto-Indo-Europeandwóh₁two

via Middle Welsh gwyt

StepLanguageWordMeaning
1Middle Welshgwyt
2Latinvitiumflaw, defect, blemish, error, fault; vice; crime
3Proto-Indo-Europeanwi-tio-
4Proto-Indo-Europeanweiguilt, vice, fault

Words derived from “gwyð

Every word from Proto-Indo-European dwóh₁Every word from Proto-Indo-European dwi-Every word from Proto-Indo-European h₁weydʰh₁-