The Shiba clan in which the Mogami clan had roots was supposed to succeed the Ashikaga clan, but was disinherited through the intermediation of the Hojo clan, and moved out and set up a new branch family of the Ashikaga family.
最上氏の起源である斯波氏は、本来足利氏となるはずだったものの北条氏の介入によって廃嫡され分家した足利家氏を祖とする。