Etymology and distribution of 岩音.

Iwaoto 【岩音】^{レベル2
About 20}  The Japanese surnames etymology dictionary.

Ehime-ken Iyo-shi . There was a name of Mr. Imagawa in the military commander of the Northern and Morning era and Muromachi era. Ehime-ken Iyo-shi Hakokura is based. It was in the Edo period in the same place. 氏兼 Ujikane reference.