Welsh afu

← Breton avu (cognate)

← Proto-Brythonic *aβʉ (inherited)

← Proto-Celtic *awV- (inherited)

← Cornish avi (cognate)

← Middle Irish áe (cognate)

← Middle Welsh auu (inherited)

→ Breton avu (cognate)

→ Welsh iau (mention)

→ Welsh afuau (affix)

→ Irish ae (cognate)

→ Scottish Gaelic adha (cognate)