Surname 由水 (Yoshimizu 
, 由水 ) , throughout the world, is a very rare cognomen. The surname 由水 is habitual in Canada, where it is an extremely rare surname, the United States, and Thailand. Not in comparison with a country's population, it is the most numerous in China, the United States, and Thailand. Much more prevalently, 由水 is the forename as well as the last name.