His mother was a Joseimoninichijo (a wet nurse of Joseimonin) who was Taikenmonin's nyogo (court lady) and daughter of the Okura-kyo (Minister of the Treasury) MINAMOTO no Morotaka.
母は大蔵卿源師隆の娘で待賢門院の女房である上西門院一条（上西門院乳母）。