Old Irish tar

← Breton treuz (cognate)

← Welsh tra (cognate)

← Proto-Indo-European *terh₂- (root)

← Proto-Indo-European *terh₂- (derived)

← Latin trāns (cognate)

→ Welsh traws (cognate)

→ Irish thar (inherited)

→ Irish tar- (inherited)

→ Scottish Gaelic tar- (inherited)

→ Manx harrish (inherited)