Around the globe, Duplin (Duplin 
, Дуплин 
) is a very rare gender-neutral forename. The given name Duplin is characteristic of Southern Asia, particularly India, where it is an extremely rare feminine name. Much more frequently, Duplin is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Duplin | Philippines, Lithuania, India, Canada, United States |
| Дуплин | Russia, Kazakhstan, Ukraine |