Cornish ewyn

← Breton ewon (link)

← Proto-Brythonic *owin (link)

← Proto-Celtic *fowino- (link)

← Proto-Celtic *fowsino- (link)

← Welsh ewyn (link)

← Irish uan (link)

← Old Irish auen (link)

← Old Irish uan (link)

→ Breton ivin (cognate)

→ Welsh ewin (cognate)

→ Welsh ewyn (cognate)

→ Irish uan (cognate)