Etymology and distribution of 岩雲.

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

Fukuoka-ken , Ehime-ken , Ooita-ken .

Originated from Ooita-ken Usa-shi . A place name with a record since the Nara period.

② Korean type . Creation . From the Japanese sound of Yu. There is a record of naturalization on Toukyou-to Machida-shi on 1 February 1964. The real name is Yu. 禹 U reference.