Cognomen กล้าย (Klai 
, กล้าย) , in the entire world, is quite a common last name. The surname กล้าย 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. In absolute terms, this name is the most popular in Tunisia, Algeria, and France. Much less frequently, กล้าย is the forename as well as the last name.