| Name | Meaning | Gender | Origin |
|---|
| Claus | Spelling variation of Nicholas | Male | Scandinavian |
| Cole | coal, victory of the people | Male | English |
| Colin | Strong and virile; victorious army; youth, child, victor | Male | English |
| Klaus | Scandinavian and German variation of Nicolas | Male | |
| Nick | Variation of Dominic, belonging to the Lord | Male | English |
| Nicky | Abbreviation of Nicholas. Mythological Nike was Greek goddess of victory and root origin of Nicholas.
| Female | |
| Niki | French feminine variation of Nicholas, Greek, people of victory | Female | Greek |
| Nikita | unconquered | Male | Russian |
| Nikki | Victorious People | Unisex | English |
| Nikolai | Greek, people of victory | Male | Russian |
| Nikolaus | Victorious People | Unisex | German |
| Nils | After Nils Master, brand of fishing lure | Male | Norwegian |