Last name Dgai (Gai 
, Dgai 
) , throughout the world, is a common cognomen. The surname Dgai is characteristic of Monaco, where it is quite a common surname, Gambia, and Macao, where it is quite a rare surname. In absolute terms, this name is the most popular in China, India, and Italy. Much less frequently, Dgai is the forename as well as the last name.