Surname เกรก (Graig 
, Krek 
, Grag 
) , in the world, is quite a rare family name. The family name เกรก is habitual in Southern Europe, particularly Slovenia, where it is quite a common surname, Montenegro, and Bosnia and Herzegovina. Not in comparison with a country's population, this name is the most popular in Bosnia and Herzegovina, the United States, and Slovenia. Also, เกรก is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Graig | Kenya, South Africa, United States, Democratic Republic of the Congo, India |
| Krek | Australia, Bosnia and Herzegovina, United States, Slovenia, Montenegro |
| Grag | United Kingdom, South Africa, Canada, United States, India |
| เกรก | Thailand |