It belonged to one of lineages of Seiwa Genji (Minamoto clan), the Shinano Genji (Minamoto clan) that falls into the branch family of Kawachi Genji (Minamoto clan), and it was a branch family of Ogasawara clan.
家系は清和源氏の一家系　河内源氏傍系にあたる信濃源氏　小笠原氏の庶家。