Cognomen Thku (ขอบคุณ 
, Thku 
) , in the entire world, is a rare last name. The surname Thku is habitual in Thailand, where it is a rare surname, and India, where it is an extremely rare surname. Very seldom, Thku is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ขอบคุณ | Thailand |
| Thku | India |