Etymology and distribution of 岩芳.

Iwayoshi 【岩芳】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Toukyou-to , Oosaka-fu · Hyougo-ken .

① Heterogeneity of 宇田川 . Nagano-ken Suwa-shi Takashima was in the Edo period in the Suwa clan in the Clan Office.

② Abstract . Synthesis of Utah and Yogawa. Shimane-ken Izumo-shi In Ogi-machi town, Mr. Uta who resides from Nara-ken avoiding warfare married Mr. Ukawa and tells that the child called Utagawa surname. Estimated in the Warring States Period. 宇多 Uda reference. 余川 Yokawa reference.