Worldwide, Calvain (Calvain 
) is quite a rare male given name. The given name Calvain is characteristic of Sub-Saharan Africa, particularly Cameroon, where it is quite a rare male name, and the Democratic Republic of the Congo, where it is a rare masculine name. Very seldom, Calvain is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Calvain | United States, Cameroon, Democratic Republic of the Congo |