According to "Mononobe Bunsho," one of the so-called 'Koshi Koden' (Ancient History and Legends), the Dewa-Mononobe clan called itself a descendant of MONONOBE no Moriya, and Fuso Ryakki (A Brief History of Japan) and Mutsu Waki (A Tale of Mutsu) say that MONONOBE no Nagayori was appointed to Mutsu no Daisakan (the fourth rank officer).
所謂「古史古伝」のひとつである物部文書に拠ると出羽物部氏は物部守屋の子孫と称し、扶桑略記、陸奥話記などには物部長頼が陸奥大目となったことが記載されている。