Last name Уатт (Watt 
, Uatt 
, Уатт 
) , around the world, is a common surname. The last name Уатт is habitual in Jamaica, where it is quite a common surname, Australia, and New Zealand (explore the name in all countries). In absolute terms, it is the most numerous in the United States, the United Kingdom, and Australia. Very seldom, Уатт is the forename as well as the last name.