Welsh coel

← Proto-Brythonic *koïl (inherited)

← Proto-Celtic *kailo- (inherited)

← Proto-Germanic *hailaz (cognate)

← Proto-Indo-European *kóylos (derived)

← Old Welsh coil(i)ou (inherited)

← Middle Welsh coel (inherited)

→ English whole (cognate)

→ Old English hal (cognate)

→ Welsh ofergoel (compound)

→ Welsh coelio (affix)

→ Welsh argoel (affix)