Surname Uiyamathiti (Uiyamathiti 
) , across the world, is a very rare family name. The cognomen Uiyamathiti is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Uiyamathiti | Thailand |
Knaz, Karn It, Kranith, Phatthamon, and Phattamon