Family name Sarayangkul (Sarayangkul 
) , all over the world, is a very rare cognomen. The last name Sarayangkul is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Sarayangkul | Thailand |
Kittisak, Kitthisak, Ratthakit, Rachadaporn, and Ratchadaporn