Cognomen ウ (U 
, Oo , ウ 
) , in the entire world, is a prevalent family name. The family name ウ is characteristic of Myanmar, where it is a prevalent surname, Mongolia, where it is a common surname, and Macao (explore the name in all countries). In absolute terms, this name is the most popular in Myanmar, India, and China. Also, ウ is the forename as well as the last name.