Old Irish búaid

← Proto-Celtic *boudi (inherited)

← Welsh budd (cognate)

← Proto-Indo-European *bʰówdʰi (inherited)

→ Welsh budd (cognate)

→ Spanish buscar (cognate)

→ Irish bua (inherited)

→ Scottish Gaelic buaidh (inherited)

→ Old Spanish buscar (cognate)

→ Portuguese buscar (cognate)

→ Old Irish Badb (cognate)