Welsh Gwyddel

← Old English wāþ (cognate)

← Breton Gouezel (cognate)

← Proto-Brythonic *guɨðel (inherited)

← Proto-Celtic *wēdus (derived)

← Proto-Indo-European *weydʰ- (derived)

← Old Irish Goídel (cognate)

← Middle Welsh Gwyðyl (inherited)

← Middle Welsh Guoiðel (mention)

→ Breton Gouezel (cognate)

→ Welsh Gwyddeleg (affix)

→ Irish Gael (cognate)

→ Old Irish Goídel (cognate)