Family name אוי (Ui 
, Hui-Lan 
, אוי 
) , in all the world, is quite a common surname. The cognomen אוי is characteristic of Macao, where it is quite a rare surname, Malaysia, and Oman, where it is a rare surname. In absolute terms, this name is the most popular in Indonesia, Malaysia, and China. Also, אוי is the forename as well as the last name.