dauphin

dolphin; dolphin; the animal used as a charge

Inherited from Old French dalphin, from Latin delphinus.

successor, dauphin; runner-up

From French dauphin (“dolphin”), originally a heraldic charge in the arms of the Counts of Albon. Because of this charge, they became known by the late 13th century as the Dauphins de Viennois, which later became their official title. The title was later inherited by the crown and assigned to the eldest son of the King.