Cognomen 瓦特 (Watt 
, Watts , 瓦特 
) , throughout the world, is a widespread family name. The surname 瓦特 is habitual in Isle of Man, where it is quite a common surname, Australia, and the United Kingdom (explore the name in all countries). In absolute terms, it is commonest in the United States, the United Kingdom, and Australia. Much less frequently, 瓦特 is the forename as well as the last name.