The Ishido clan was a branch family of the Ashikaga clan which was begun by MINAMOTO no Yoshikuni, a son of MINAMOTO no Yoshiie who was Chinju-fu shogun (Commander-in-Chief of the Defense of the North) and the head of Kawachi-Genji (Minamoto clan), one of the lineages of Seiwa Genji (Minamoto clan).
家系は清和源氏の一家系　河内源氏の棟梁　鎮守府将軍源義家の子　源義国を祖とする足利氏の支流　石堂氏。