Cognomen トゥ (Thu 
, Tu , トゥ 
) , all over the world, is a prevalent surname. The surname トゥ is characteristic of Myanmar, where it is a prevalent surname, Macao, where it is a common surname, and Marshall Islands (explore the name in all countries). In absolute terms, it is the most numerous in Myanmar, China, and Vietnam. Very seldom, トゥ is the forename as well as the last name.