Last name ไข้ (Khai 
, ไข้, Feever) , around the world, is a common family name. The cognomen ไข้ 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, the name is most common in South-eastern Asia, particularly Malaysia, Myanmar, and Vietnam. Likewise, ไข้ is the forename as well as the last name.