During the Edo Period, four vassals, including the Rusu clan (the Mizusawa-Date clan), the Shiraishi clan (the Tome-Date clan), the Watari clan (the Wakudani-Date clan) and the Iwaki clan (the Iwayado-Date clan), were allowed to use the family name of DATE.
-江戸時代には留守氏（水沢伊達家）、白石氏（登米伊達家）、亘理氏（涌谷伊達家）、岩城氏（岩谷堂伊達家）が伊達姓を許されている。