However, it is mentioned in some cases that the Kishu Marquis family in reality became extinct, and also there exists a view that the 19th family head has not been recognized as a member of the Tokugawa and Matsudaira family association, which was formed by descendents of the Matsudaira clan.
しかし、旧侯爵家としては事実上の断絶状態にあるとする記述も見受けられ、またいわゆる松平氏の子孫で構成される徳川・松平一門の会にも、現19代当主は会員と認められていないとの説もある。