Cognomen Уи (Ui 
, Уи 
) , all over the world, is quite a common surname. The family name Уи is habitual in Macao, where it is quite a rare surname, Malaysia, and Oman, where it is a rare surname. In absolute terms, it is the most numerous in Indonesia, Malaysia, and China. Also, Уи is the forename as well as the last name.