Cognomen كلاي (Clay 
, Klay , كلاي 
) , around the globe, is a common last name. The cognomen كلاي is habitual in Isle of Man, where it is quite a common surname, the United States, and Switzerland (explore the name in all countries). In absolute terms, it most frequently occurs in the United States, the United Kingdom, and Myanmar. Also, كلاي is the forename as well as the last name.