Family name หอย (Hoi 
, หอย 
, Clamar 
) , around the world, is a common surname. The family name หอย is characteristic of Macao, where it is a widespread surname, Malaysia, where it is quite a common surname, and Hong Kong (explore the name in all countries). Not in comparison with a country's population, it most frequently occurs in Malaysia, Japan, and Macao. Likewise, หอย is the forename as well as the last name.