The family was named 'Nakamikado' because Toshiie's heir, FUJIWARA no Munetoshi (who held the position of Dainagon, a chief councilor of state), had a mansion in Nakamikado.
俊家の嫡男大納言藤原宗俊が中御門に邸宅を持っていたことから「中御門」と号した。