Family name สุโขทัย (สุโขทัย 
, Sukhothai 
, Sruk 
) , across the world, is quite a rare cognomen. The last name สุโขทัย is characteristic of Croatia, where it is quite a common surname, Philippines, where it is a rare surname, and Thailand. Much less frequently, สุโขทัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สุโขทัย | Thailand |
| Sukhothai | Malaysia, United States, Thailand, Myanmar |
| Sruk | Germany, United States, Croatia, India |
| Suhot | Philippines, Malaysia, Singapore, Thailand |
Soukeuangsy, Souphophanh, Sruka, Sucaothi, Sukanothai, Sukauthai, Sukautta, Sukhai, Sukhamhai, Sukhathai, Sukhohai, Sukholthong, Sukhongj, Sukhotai, Sukhothara, Sukhoti, Sukhotr, Sukhow, Sukhuntho, Sukkhothai, Sukkothai, Suklothong, Sukoatta, Sukoktoud, Sukomud, Sukotdat, Sukthongthai, Sukthonthan, Sukurthai, Suphothai, Supkongyou, Suthowa, and ศุก
| สมเกียรติ สุโขทัย TH (b. 1956) |
|