The name of Ietsugu was referred much less than his brother Tokiie, and it is considered because the content of "Azuma Kagami" centered on Togoku (the eastern part of Japan, particularly Kanto region) and Ietsugu who had been active in western Japan had not frequently been recognized.
弟である時家に対し、余りにも登場していないが、これは『吾妻鏡』が東国主体の内容である為と考えられ、西日本で活動していた家次は余り確認されていなかったものとみられる。