Cognomen نيكوي (Nkoy 
, نيكوي 
) , throughout the world, is quite a rare family name. The surname نيكوي is characteristic of the Democratic Republic of the Congo, where it is quite a rare surname, the Republic of the Congo, and Belgium, where it is a rare surname. Measured by absolute frequency, this name is the most popular in the Democratic Republic of the Congo, Iran, and the Republic of the Congo. Very seldom, نيكوي is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Nkoy | Belgium, Democratic Republic of the Congo, France, Republic of the Congo, Nigeria |
| نيكوي | Iran |