Cognomen កាស៊ូ (កាស៊ូ 
) , around the globe, is an extremely rare surname. The cognomen កាស៊ូ is habitual in South-eastern Asia, particularly Cambodia, where it is a very rare surname. More prevalently, កាស៊ូ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| កាស៊ូ | Cambodia |