The mother of MINAMOTO no Tomonaga, MINAMOTO no Yoritomo's older half brother, was also Yoshitsune's aunt, and Kageyoshi OBA was a senior vassal of Yoshitomo, Yoritomo's father, and a patriarch of the Kamakura Shogunate as well.
源頼朝の腹違いの兄・源朝長の母(坊門姫)は義常の叔母でもあり、大庭景義は頼朝の父義朝の重臣で、鎌倉幕府の長老であった。