Cornish per

← Breton per (cognate)

← Proto-Brythonic *per (inherited)

← Proto-Celtic *kʷaryos (inherited(kw/br))

← Middle Cornish per (inherited)

← Welsh pêr (cognate)

← Latin pira (derived)

← Latin pirum (mention)

→ Breton per (cognate)

→ Breton per (cognate)

→ Welsh pêr (cognate)