Worldwide, Nicholaas (Nicholaas 
) is a rare masculine first name. The given name Nicholaas is habitual in South Africa, where it is quite a rare masculine name, and the United States, where it is an extremely rare principally masculine, but very seldom girly name. Much less frequently, Nicholaas is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Nicholaas | South Africa, New Zealand, United Kingdom, United States, India |
| nicholaas ferdinand le grand Dutch composer, NL (b. 1660) |
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| nicholaas hendrik swellengrebel botanist (b. 1885) |
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| nicholaas theodorus carstens (b. 1886) |
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| nicholaas van eyck painter |
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| nicholaas verreyne Australian amateur wrestler, AU (b. 1992) |
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Nel, Perkins, Garrett, Grobler, Jordaan, Erasmus, Abrahams, Claassen, Prinsloo, Greyling, Opperman, Oosthuyzen, Willemse, Scheepers, Kleynhans, Pretorius, Engelhard, Vermeulen, Breytenbach, Du Plessis, Gillingham, Oosthuizen, Coetzee, Strydom, Moltion, Fourie, Els, Van, Vos, Smit, Cook, Dube, Meyer, Steyn, Smith, Swart, Van Der Merwe, Botha, Weber, Quist, Swartz, Andela, Cloete, Kasper, Diemel, Goosen, Visser, Venter, Kealy, and Van Der Westhuizen