All around the world, Nikollaj (Nikollaj 
) is an extremely rare boy's first name. Much more frequently, Nikollaj is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Nikollaj | Austria, Kosovo, United States, Greece, Albania |
Mr, Leon, Lila, Lisa, Liza, Lize, Lynn, John, Joni, Tony, Toni, Tush, Niko, Nita, Hana, Vera, Fran, Maria, Marin, Mario, Mrike, Mhill, Gjon, Gina, Dile, Prek, Ms, Mus, Kol, Pal, Dea, Liz, Tom, Nik, Nua, Edi, Simon, Eva, Mark, Maki, Meri, Mira, Musa, Aldo, Agim, Kevi, Paul, Pren, Zef, and Sonja