Etymology and distribution of 岩浪.

Iwanami 【岩浪】^{レベル4
About 1,700}  The Japanese surnames etymology dictionary.

Okayama-ken . Creation . Okayama - ken Kume - gun Misaki - chou In Tohara he tells that he inverted it to "Shinpei" in order to disguise him. Estimated in the Kamakura period. Okayama-ken Kume-gun Misaki-chou Shiraishi of Oshima is a transit point. It is said that Mr. Shinra Mr. Mr. Mihira has come here from 1573 to 1592 (Tensho year). 平 Taira reference.