The predecessor the Emperor Anko ordered Imperial Prince Okusaka (a son of the Emperor Nintoku) to offer his younger sister, Kusaka no Hatabi no Himemiko to the Emperor Yuryaku (before enthronement; younger maternal half-brother of the Emperor Anko) (Imperial Prince Okusaka and Kusaka no Hatabi no Himemiko are Yuryaku's paternal uncle and aunt, respectively).
先代の安康天皇が、仁徳天皇の子である大草香皇子に、妹の草香幡梭皇女を、同母弟である即位前の雄略天皇の妃に差し出すよう命令した（大草香皇子と草香幡梭皇女は父系の叔父と叔母）。