Etymology and distribution of 早丸.

Hayamaru 【早丸】^{レベル3
About 60}  The Japanese surnames etymology dictionary.

Niigata-ken Shibata-shi . A variant of the 三尾 . In Niigata - ken Shibata - shi telling that the shrine from Shiga - ken changed from Mikio surname. Estimated in the Edo period. 三尾 Mitsuo reference.