They were a branch of the Nakanoin family of the Murakami-Genji (Minamoto clan), founded by Michiari ROKUJO, the fifth son of Dajodaijin (grand minister of the state) Michiteru KOGA.
村上源氏中院流の庶家で、太政大臣久我通光の5男・六条通有を始祖とする。