Welsh cleddyf

← Breton klezeñv (cognate)

← Proto-Brythonic *klėðɨβ̃ (inherited)

← Proto-Celtic *kladiwos (inherited)

← Old Irish claideb (cognate)

← Middle Welsh cledyf (inherited)

→ Breton klezeñv (cognate)

→ Welsh cledd (mention)

→ Welsh cleddyfau (affix)

→ Old Irish claideb (cognate)