Proto-Indo-European *pérkus

→ English firth (derived)

→ English frith (derived)

→ Old English fyrhþe (inherited)

→ Old English furh (derived)

→ Galician cerquiño (derived)

→ Galician carqueixa (derived)

→ Galician cerqueiro (derived)

→ Latin quercus (derived)

→ Latin Querquerni (derived)