Irish tarbh

← Breton tarv (cognate)

← Gaulish taruos (cognate)

← Proto-Celtic *tarwos (inherited)

← Welsh tarw (cognate)

← Proto-Indo-European *táwros (inherited)

← Cornish tarow (cognate)

← Latin taurus (cognate)

← Old Irish tarb (inherited)

→ Irish tarbhchomhrac (affix)

→ Old Norse tarfr (cognate)