Old Irish bó

← Proto-Celtic *bāus (inherited)

← Proto-Indo-European *gʷṓws (inherited)

→ English booly (derived)

→ Welsh buwch (cognate)

→ Irish bó (inherited)

→ Irish buar (mention)

→ Scottish Gaelic bò (inherited)

→ Manx booa (inherited)

→ Latvian govs (cognate)

→ Old Irish búar (mention)