Around the world, Nicolaus (Nicolaus 
, Νικόλαος 
, Николаус 
, among others...) is a common boy's first name. The first name Nicolaus is habitual in Tanzania, where it is quite a common male name, Greece, and Sweden, where it is quite a rare boy's name. In absolute terms, it is the most numerous in Tanzania, Indonesia, and Germany. Likewise, Nicolaus is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Nicolaus | Germany, Sweden, Indonesia, United States, Tanzania |
| Νικόλαος | Greece |
| Николаус | Kyrgyzstan, Kazakhstan, Russia, Ukraine |
| ניקולאוס | Israel |
Fjompenisse, Klaus, Laakkonen, Mikołaj, Mikuláš, Nicholaus, Nicoară, Nicola, Nicolae, Nicolai, Nicolau, Nicolás, Nicolò, Niels, Nigul, Nigulas, Niilo, Niko, Nikola, Nikolai, Nikolaj, Nikolaos, Nikolaus, Nikołaj, Nikólaos, Nils, Nings, Микола, Миколай, Мікалай, Никколо, Нико, Никола, Николай, Николаос, Николас, Ницолаус, Ніколас, Нільс, ניקולאי, ניקולאס, ניקולס, كلاوس, نيكولا, نيكولاس, نيكولاي, ნიკოლოზ, ニコ, 尼古拉斯, 尼柯, and
Nicolaus is also a prevalent name for the fictitious and mythical characters: Nick Wilde , the Zootopia character; Nick Fury , the fictional character from the Marvel Cinematic Universe, Avengers: Infinity War; Michael Darling , the fictional character from Peter Pan; Nearly Headless Nick , character in Harry Potter and Nicholas Brody , the fictional character on the American television/drama thriller Homeland, and in many other works.
| nicolaus sophista TR (b. 400) |
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| nicolaus furiosus Italian jurist (12th century) (b. 1101) |
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| künstler nicolaus (b. 1110) |
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| nicolaus praepostius (b. 1140) |
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nicolaus pp. iii Pope from 1277 to 1280, IT (b. 1215) |
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nicolaus pp. iv pope of the Catholic Church from 1288 to 1292, IT (b. 1227) |
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| nicolaus magister author (13th century) (b. 1201) |
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| nicolaus rufulus author (13th century) (b. 1201) |
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| nicolaus de mediolano (b. 1200) |
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| nicolaus de rocca (b. 1225) |
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| nicolaus sigvasti SE (b. 1250) |
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| nicolaus fransoyser (b. 1285) |
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| nicolaus gallicus medieval engraver and goldsmith of Siena, IT (b. 1300) |
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| nicolaus schoneke German politician, DE (b. 1300) |
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| nicolaus de calvia author (1301-1500) (b. 1301) |
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