Cognomen Û (Û 
) , in the world, is a rare family name. The family name Û is characteristic of Myanmar, where it is a rare surname, Iran, where it is a very rare surname, and South Africa, where it is an extremely rare surname. Not in comparison with a country's population, it most frequently occurs in Myanmar, Iran, and China. Much more prevalently, Û is the forename as well as the last name.