Cognomen Chhoy (ชอย 
, Chhoy 
) , in the entire world, is a rare surname. The family name Chhoy is characteristic of Cambodia, where it is a rare surname, Thailand, and Australia, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in Thailand, the United States, and Cambodia. More frequently, Chhoy is the forename as well as the last name.