Breton roue

← Gaulish [[-rix]], [[-rēx]] (mention)

← Proto-Celtic *rīxs (mention)

← Middle French roi (derived)

← Irish rí (mention)

← Scottish Gaelic rìgh (mention)

← Proto-Indo-European *h₃rḗǵs (mention)

← Cornish ruy (mention)

← Latin rēx (cognate)

← Old Breton ri (mention)

← Sanskrit राज् (cognate)

← Sanskrit राजन् (mention)

← Middle Welsh rhi (mention)

← Middle Breton roe (inherited)