Compounds of 殿下

• 殿下
  (ok) (n) your Highness
  his (or her) Highness
• 殿下
  (n) your Highness
  his (or her) Highness
  (P)
• 妃殿下
  (n) (hon) princess
  Her Royal Highness
  (P)
• 皇太子殿下
  (n) the Crown Prince