Etymology and distribution of 岩家.

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

Okayama-ken .

① Origin of Ibaraki-ken Mito-shi Joto -Dori (old: floating). A place name with a record in the notation of "Uki" from the Kamakura period to the Muromachi period. Tradition in Shimane-ken western part (formerly Iwami-kuni). There is 浮田 surname. 浮田 Ukita reference.

② Originated from Ehime-ken Kami Hole County (formerly Ukinaha County). A place name with a record since the Nara period. The old pronunciation in the estimation of the place name is Ukiana. In Kanagawa-ken tell me that Meiji New Last name used "floating" of floating hole.