Etymology and distribution of 円丸.

Enmaru 【円丸】^{レベル2
About 10}  The Japanese surnames etymology dictionary.

Fukuoka-ken , Kagoshima-ken , Shizuoka-ken .

① Topography . From the island of Okinawa. There are examples where Oki means "back". Fukuoka-ken Tagawa-shi Ita is based. Shizuoka-ken Numadzu-shi Toda is based. The land is facing Suruga Bay. Nagano-ken Matsumoto-shi Marunouchi was in the Edo period in the clan of Matsumoto of the Clan Office.

② Topography . "Island" was added to the offshore which is the surname of Amagi archipelago of Kagoshima-ken . Estimated at the time of returning to Japan in 1953. 沖 Oki reference.