It is described in Ryonoshuge (Commentaries on the Civil Statutes) that he was the child of Emperor Suinin, but since there was a member of the Imperial family who had the same name that lived during the period of Emperor Yuraku, whether if they were the same person, or the name had been succeeded for a number of generations, or if the name of the Emperor was a mistake, is unknown.
令集解では垂仁天皇の子とされるが、雄略天皇の時代にも同名の皇族がおり、同一人物か、名が数代継がれていたのか、天皇の名前が間違いなのか、不明。