Last name クロイ (クロイ 
, Cloy 
, Croi 
) , globally, is a rare family name. The cognomen クロイ is characteristic of Belgium, where it is a rare surname, the United Kingdom, and Australia. Not in comparison with a country's population, it is the most numerous in the United States, the United Kingdom, and Australia. Also, クロイ is the forename as well as the last name.