Cognomen ใข่ (Khai 
, ใข่) , all around the world, is a common surname. The cognomen ใข่ 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, this name is the most popular in South-eastern Asia, particularly Malaysia, Myanmar, and Vietnam. Likewise, ใข่ is the forename as well as the last name.