In addition, Yoshinori NITTA (WAKIYA), reportedly a Yoshimune's child, is also said to have succeeded to the Serada clan on his maternal side, and his child, Sukeyoshi is said to have fled to Mafune Village.
また、義宗の子とも伝わる新田（脇屋）義則は、母方の世良田氏も継承したといい、その子・祐義は真船村に逃れたという。