In all the world, Geirnaert (Geirnaert 
) is a very rare masculine given name. The given name Geirnaert is habitual in Western Europe, particularly Belgium, where it is a very rare masculine name. Much more frequently, Geirnaert is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Geirnaert | Belgium, Canada, Poland, France, South Africa |