Throughout the world, Nickolaos (Nickolaos 
) is a rare masculine first name. The forename Nickolaos is characteristic of Greece, where it is a rare boy's name, the United States, where it is a very rare boy's name, and South Africa. Much less frequently, Nickolaos is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Nickolaos | Greece, Australia, South Africa, Canada, United States |
| nickolaos kourkoulakos Greek Army Officer during the Axis Occupation of Greece (b. 1894) |
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| nickolaos stagias director and filmmaker |
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| nickolaos farmakidis researcher |
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| nickolaos tzeremes economist (University of Thessaly) |
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Lagen, Bardanis, Bourbous, Derziotis, Laskaris, Tzovolos, Economou, Stamatiou, Karvounis, Kontoleon, Kontolios, Kotsianas, Pournaras, Louloudis, Papalaskaris, Portaritis, Dimopoulos, Georgoulis, Neofitidis, Kostopoulos, Kotsiopoulos, Gasparinatos, Antoniou, Halkias, Gatseos, Polemis, Makris, Mellos, Siozos, Kallis, Kapsis, Pappas, Petris, Drizos, Ginnis, Tzefos, Andronikidis, Haskakis, Vergos, Wehlau, Malamos, Sakalis, Simpson, Sifnaios, Skouras, Sfirakis, Argyris, Bocolos, Vamvlas, and Protonotarios