Cognomen كوكير (Coker 
, Koker 
, كوكير) , in the world, is a common family name. The cognomen كوكير is characteristic of Sierra Leone, where it is quite a common surname, Gambia, and Trinidad and Tobago. Not in comparison with a country's population, the name is most common in the United States, Nigeria, and Sierra Leone. Much less frequently, كوكير is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Coker | Nigeria, Sierra Leone, Indonesia, United States, United Kingdom |
| Koker | Australia, Nigeria, Sierra Leone, United States, United Kingdom |