All over the world, Nicolaidis (Гулан 
, Nicolaidis 
) is a rare gender-neutral forename. The first name Nicolaidis is habitual in Kyrgyzstan, where it is quite a rare predominantly female, but very infrequently boy's name, Azerbaijan, where it is quite a rare female name, and Uzbekistan, where it is a rare male name. Also, Nicolaidis is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Гулан | Azerbaijan, Uzbekistan, Kazakhstan, Russia, Ukraine |
| Nicolaidis | Germany, Australia, United States, France, Brazil |