Etymology and distribution of 八岡.

Yatsuoka 【八岡】^{レベル3
About 70}  The Japanese surnames etymology dictionary.

熊本県、和歌山県・東京都。ハチオカも含む分布。地形。八つの岡から。多いたとえとして「八」を使用する例あり。熊本県八代市東陽町河俣に分布あり。

Hachioka 【八岡】^{レベル3
About 70}  The Japanese surnames etymology dictionary.

Fukushima-ken , Niigata-ken , Oosaka-fu .

① things . From three stars. Ishikawa-ken Komatsu-shi Tell Ohno-cho that you called from Orion. Estimated in the Edo period. There are three stars in the family crest. Fukushima-ken Aidzuwakamatsu-shi Ochiai town was in the Edo period in the Aizu samurai of the clan office.

② things . Ishikawa-ken Hakui-shi The Meiji New surname by the monk of Zenjinji in Jodo Shin Buddhist in Yanagida-cho. From Samsay Mountain of the temple's mountain.