His mother was Hachi NAITO (lawful wife), a daughter of Tadamasa NAITO, fudai daimyo (a daimyo in hereditary vassal to the Tokugawa family) (the lord of Toba domain of the Province of Shima).
母は譜代大名の内藤忠政（志摩国鳥羽藩主）の娘・内藤波知（正室）。