Globally, Nelko (Nelko 
) is a very rare unisex forename. The first name Nelko is habitual in Bulgaria, where it is a rare boy's name, and India, where it is an extremely rare gender-neutral name. More frequently, Nelko is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Nelko | Bulgaria, India, Albania, United States, North Macedonia |