Welsh byddar

← Breton bouzar (cognate)

← Proto-Brythonic *boðar (inherited)

← Proto-Celtic *bodaros (inherited)

← Irish bodhar (cognate)

← Scottish Gaelic bodhar (cognate)

← Manx bouyr (cognate)

← Proto-Indo-European *bʰodʰHrós (inherited)

← Cornish bodhar (cognate)

→ Welsh -ar (mention)

→ Welsh byddaru (affix)

→ Welsh byddarol (affix)