Surname Нгиа (Ngia 
, Nguia 
, Ngya 
) , worldwide, is a common last name. The surname Нгиа is characteristic of Gabon, where it is quite a common surname, the Democratic Republic of the Congo, and Singapore, where it is a rare surname. In absolute terms, this name is the most popular in the Democratic Republic of the Congo, Gabon, and Malaysia. Much less frequently, Нгиа is the forename as well as the last name.