Around the world, Marcilin (Marcilin 
) is a rare epicene first name. The forename Marcilin is habitual in Philippines, where it is a very rare mostly girly, but seldom masculine name, and India, where it is a very rare unisex name. Much less frequently, Marcilin is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Marcilin | South Africa, Canada, Philippines, United States, India |