Etymology and distribution of 牛口.

Ushiguchi 【牛口】^{レベル3
About 200}  The Japanese surnames etymology dictionary.

Akita-ken Kadzuno-shi , Kyouto-fu , Kumamoto-ken Amakusa-shi .

① Mie-ken Inabe-shi Birth of Umedo, Daan-cho. Place name with a record since the North / South morning era. Last name also called "Umezu." 梅津 Umedzu reference. In Kyouto-fu Kyouto-shi tells that it was renamed from Ishikawa surname in 1667 (Kanbun 7 years). 石川 Ishikawa reference.

② Kumamoto-ken Amakusa-shi Birthplace originated from Umedo in Kurakadocho Ura.