FromOld Cornisheuuin, fromProto-Brythonic*ėɣwin, fromProto-Celtic*angʷīnā. Cognate withBretonivin,Irish andScottish Gaelicionga,Manxingin, andWelshewin.

FromOld Cornishhiuin, fromProto-Brythonic*ɨwī,*ɨwɨnā, fromProto-Celtic*iwos. Cognate withBretonivin,Irisheo, andWelshyw.
FromMiddle Welshewin, fromOld Welsheguin, fromProto-Brythonic*ėɣwin, fromProto-Celtic*angʷīnā, fromProto-Indo-European*h₃nogʰ-(“nail”).
CompareCornishewin,Bretonivin,Irishionga; alsoLatinunguis,Englishnail,Ancient Greekὄνυξ(ónux),Russianноготь(nogotʹ).
| radical | soft | nasal | h-prothesis |
|---|---|---|---|
| ewin | unchanged | unchanged | hewin |
Note: Certain mutated forms of some words can never occur in standard Welsh.
All possible mutated forms are displayed for convenience.