Kyuutoku 【久徳】4 The Japanese surnames etymology dictionary.
① Topography . A variant of 倉本 . From the Kuramoto gate of the gate division system which was in the Edo period. An example of the location of the gate. Kagoshima-ken Isa-shi Ryugaku-ga , Kagoshima-ken Minamikyuushuu-shi Gorokamachi Ogun , Kagoshima-ken Aira-shi Kamoshima Kamiutoku, Kagoshima-ken Soo-shi Tibu-cho Kitamata. Miyagi-ken Tooda-gun Misato-machi It was in the Edo era in Fukke bag.
② Kagoshima-ken Minamikyuushuu-shi Birthplace originated from the brewery of a small character in Kawabe-cho Nozaki. In the same era there was a Kurumoto gate in the Edo era system of the gate division system.