Welsh gŵyl

← Proto-Celtic *wēlos (inherited)

← Welsh Dydd Gŵyl Dewi Sant (link)

← Welsh gwylio (link)

← Welsh gwylnos (link)

← Proto-Indo-European *weǵ- (derived)

← Latin vigilia (derived)

← Latin vigil (mention)

← Middle Welsh gŵyl (inherited)

→ Breton gouel (cognate)

→ Welsh hwyl (mention)

→ Welsh gwylio (mention)

→ Welsh annwyl (affix)

→ Irish fial (cognate)

→ Old Irish fíal (cognate)