Cognomen อ๋อย (Oi 
, Aoy 
, อ๋อย) , throughout the world, is a common family name. The family name อ๋อย is characteristic of Malaysia, where it is quite a common surname, Macao, where it is quite a rare surname, and Hong Kong. Not in comparison with a country's population, this name is the most popular in South-eastern Asia, particularly Indonesia, Malaysia, and Myanmar. Also, อ๋อย is the forename as well as the last name.