Family name Sitthikhunkaew (Sitthikhunkaew 
) , in the entire world, is a very rare last name. The cognomen Sitthikhunkaew is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Sitthikhunkaew | Thailand |
Pan, Sarttra, Nattierawat, Fongchan, and Pornphilai