The Japanese surnames etymology dictionary.
① Originated from Isoda of Gunma-ken Fujioka-shi (formerly known as Midori-gun). Period, location unknown. Kanagawa-ken Odawara-shi The inside of the castle was in the Edo period in the clan Odawara of the clan government. The same clan says that Mie - ken Iga - shi · Nabari city (old: Iga ku) is out. Tottori-ken Saihaku-gun Nanbu-chou tell him that he was engaged in agriculture in the duck. Estimated in the Edo period. The land is inland.
② Miyagi-ken Oosaki-shi Iwadeyama Isoka Fujiya family birth. A place name with a record since the Warring States Period. Miyagi-ken Sendai-shi Aoba-ku Kawauchi was in the Edo era in the Sendai Samurai of the Clan office. The same clan says that Shizuoka-ken western part (formerly Ryo Nation) comes out.