Surname クレイ (Clay 
, Klay , Cray , among others...) , in all the world, is a common last name. The last name クレイ is characteristic of Isle of Man, where it is quite a common surname, the United States, and Switzerland (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in the United States, the United Kingdom, and Myanmar. Likewise, クレイ is the forename as well as the last name.