Etymology and distribution of 宇住.

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

Saga-ken , Fukuoka-ken , Nagasaki-ken . Terrain . A variant of 江添 . There is a transmission from Saga-ken Saga-shi (formerly Saga-gun) from Esakaso and from Kawazoe. Hitei land is Saga-Ken Saga-Shi Kawazoe town. Place name with a record in Heian era "Kawadori" notation. Saga-ken Saga-shi The inside of the castle was in the Edo period in the Saga Samurai of the Clan office. 川副 Kawazoe reference.