According to the Edo bakufu, when a member from the eighteen Matsudaira families which were Ieyasu TOKUGAWA's patrilineal relatives became daimyo, he was not a 'shinpan' but 'fudai daimyo.'
江戸幕府では、徳川家康の男系親族である十八松平の内、大名になった者は「親藩」ではなく「譜代大名」とする。