Throughout the world, Merlain (Merlain 
) is quite a rare male given name. The forename Merlain is habitual in Sub-Saharan Africa, particularly the Democratic Republic of the Congo, where it is quite a rare masculine name, and Cameroon. Very seldom, Merlain is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Merlain | Mexico, Switzerland, United States, Cameroon, Democratic Republic of the Congo |