Family name Kithsiri (Kithsiri 
) , in all the world, is quite a rare surname. The family name Kithsiri is habitual in Sri Lanka, where it is quite a common surname, Qatar, where it is quite a rare surname, and United Arab Emirates, where it is a rare surname. Also, Kithsiri is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kithsiri | Sri Lanka, Australia, United Arab Emirates, Qatar, Saudi Arabia |