Last name Иенг (Ieng 
, Иенг) , worldwide, is quite a common surname. The last name Иенг is characteristic of Macao, where it is quite a common surname, Taiwan, and Qatar, where it is quite a rare surname. Not in comparison with a country's population, it is commonest in Taiwan, the United Kingdom, and Macao. Very seldom, Иенг is the forename as well as the last name.