Cognomen 沃沙 (Washer 
, 沃沙) , throughout the world, is quite a rare last name. The cognomen 沃沙 is characteristic of New Zealand, where it is quite a rare surname, Australia, where it is a rare surname, and the United Kingdom. Not in comparison with a country's population, this name is the most popular in the United States, the United Kingdom, and Australia. Very seldom, 沃沙 is the forename as well as the last name.