Cognomen كوج (Koj 
, كوج 
) , across the world, is quite a common family name. The last name كوج is characteristic of Poland, where it is quite a rare surname, Sudan, where it is a rare surname, and Germany. Not in comparison with a country's population, this name is the most popular in India, Poland, and Germany. Also, كوج is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Koj | Germany, Angola, Poland, India, Democratic Republic of the Congo |
| كوج | Sudan |