Last name ใง (Ngai 
, ใง) , across the world, is a common surname. The surname ใง is habitual in Hong Kong, where it is a common surname, Cayman Islands, and Macao, where it is quite a common surname (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in Hong Kong, Indonesia, and China. Likewise, ใง is the forename as well as the last name.