Surname อู้ (U 
, Loo , Uul 
) , in the world, is a widespread last name. The last name อู้ is habitual in Mongolia, where it is a common surname, Macao, and Malaysia (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in India, Malaysia, and Indonesia. More frequently, อู้ is the forename as well as the last name.