Surname ไคย (Khai 
, ไคย 
) , around the globe, is a common last name. The last name ไคย is characteristic of South-eastern Asia, particularly Malaysia, where it is quite a common surname, Myanmar, and Brunei (explore the name in all countries). Measured by absolute frequency, it is commonest in South-eastern Asia, particularly Malaysia, Myanmar, and Vietnam. Also, ไคย is the forename as well as the last name.