Old Irish béo

← Proto-Celtic *biwos (inherited)

← Welsh byw (cognate)

← Proto-Indo-European *gʷeyh₃- (root)

← Proto-Indo-European *gʷih₃wós (inherited)

← Proto-Indo-European *gʷeyh₃- (mention)

← Old Irish bethu (link)

← Old Irish (link)

→ Irish beo (inherited)

→ Irish bíchearb (mention)

→ Scottish Gaelic beò (inherited)

→ Manx bio (inherited)

→ Old Irish béoigidir (affix)