But it remained as customs to generally call the emperors' sons Miko, and then the naming became often used to refer to their relationship with the emperors such as the first Miko, the second Miko, or the first Himemiko.
但し、天皇の男子一般を皇子と呼ぶ習慣は残り、第一皇子、第二皇子、第一皇女というように、天皇との続柄を指す場合に多用されるようになった。