Welsh cyfrwy

← Breton kevre (cognate)

← Proto-Brythonic *kuβ̃ruɨɣ (inherited)

← Proto-Celtic *komrigā (inherited)

← Proto-Celtic *rig- (mention)

← Proto-Indo-European *reyǵ- (inherited)

← Cornish kevren (cognate)

← Old Irish con·rig (cognate)

← Middle Welsh kyfreieu (inherited)

→ Welsh cyfrwyo (affix)