Surname クサイ (Xi 
, Qusay 
, クサイ 
) , around the world, is a widespread cognomen. The cognomen クサイ is characteristic of Malaysia, where it is quite a common surname, Bermuda, and China (explore the name in all countries). In absolute terms, it is commonest in China, Malaysia, and Iraq. Likewise, クサイ is the forename as well as the last name.