Etymology and distribution of 波岡.

Namioka 【波岡】^{レベル4
About 800}  The Japanese surnames etymology dictionary.

Yamagata-ken , Tochigi-ken , Niigata-ken .

① Nagano-ken Chikuma-shi Originated from the vicinity of Oboboyama (Kobuyayama) (Old: Funayama Township). A place name with a record since the Kamakura period.

※ Tochigi-ken Ootawara-shi Tomike (formerly Funayama) was a place name with a record since the Edo period.

② things . Hiroshima-ken Hiroshima-shi Tells that the descendant of Mr. Yamanaka, who was the castle owner of Funami Castle in Kameyama during the Warring States Period, used the castle name as surname. 山中 Yamanaka reference.