The founder of the Date clan and Hitachi-nyudo Nensai are identified as Tamemune (although it might be a writing error as the eldest son of Nensai is also identified as Tanemune), and both Tokitsuna and Yoshihiro are described as sons of Nensai.
伊達初代も常陸入道念西も為宗（念西の長子も為宗となってるので誤記か?）とし、時綱・義広の兄弟を念西の子とする。