Worldwide, Ниелин (Nielin 
, Ниелин 
) is a very rare largely masculine, but uncommonly girly first name. The given name Ниелин is habitual in Eastern Europe, particularly Romania, where it is a rare masculine name. Likewise, Ниелин is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Nielin | Germany, Romania, South Africa, Philippines, United States |
| Ниелин | Kazakhstan, Russia |