Etymology and distribution of 上内侍.

Kaminaiji 【上内侍】^{レベル2
About 30}  The Japanese surnames etymology dictionary.

Akita-ken . Originated from Kyouto-fu Kyouto-shi (old: Heiankyo). A place name with a record since the Heian period. In Akita-ken Senboku-gun told that Kyouto-fu Kyouto-shi came out of "Kyo" and "Waka" was used as a particle "of".