Cognomen 水守 (Mizumori 
, 水守 ) , in the world, is a very rare surname. The surname 水守 is characteristic of Hong Kong, where it is a rare surname, Brazil, where it is an extremely rare surname, and the United States. In absolute terms, the name is most common in China, Hong Kong, and the United States. More prevalently, 水守 is the forename as well as the last name.