Cognomen Nikolaidis (Nikolaidis 
, ニコライディス, Николаидис 
) , in the world, is a common last name. The cognomen Nikolaidis is habitual in Cyprus, where it is a common surname, Greece, where it is quite a common surname, and Bulgaria, where it is quite a rare surname. In absolute terms, the name is most common in Greece, Cyprus, and Germany.
| VARIANT | COUNTRY |
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| Nikolaidis | Germany, Bulgaria, Greece, Cyprus, United States |
| Николаидис | Russia |
| Νικολαΐδης | Greece |
Nikolaídis, Nikolaïdis, Νικολαιδης, Николайдис, Ніколаідіс, and ניקולאידיס
| georgios nikolaidis Greek classical philologist and archaeologist (b. 1820) |
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ninos nikolaidis Greek rower, GR (b. 1998) |
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| jovan nikolaidis ME (b. 1950) |
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| konstantinos nikolaidis chess player (b. 1964) |
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| theofilaktos nikolaidis Greek footballer, GR (b. 1973) |
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| andrej nikolaidis Montenegrin-Bosnian writer, BA (b. 1974) |
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| georgios nikolaidis Ph.D. University College London 2016 |
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| stefanos nikolaidis researcher (ORCID 0000-0001-8237-4492) |
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| george n nikolaidis researcher |
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| nikolaos p. nikolaidis researcher |
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| pantelis theodoros nikolaidis researcher |
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| nikolaos m nikolaidis researcher |
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| nikolas nikolaidis researcher |
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| george nikolaidis researcher |
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| alexandros k nikolaidis researcher (ORCID 0000-0002-9191-0573) |
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