Cognomen กล่าย (Klai 
, กล่าย) , in the world, is quite a common family name. The surname กล่าย is habitual in Tunisia, where it is quite a common surname, Algeria, where it is quite a rare surname, and Oman, where it is a rare surname. Not in comparison with a country's population, the name is most common in Tunisia, Algeria, and France. Much less frequently, กล่าย is the forename as well as the last name.