Throughout the world, Wardenaar (Wardenaar 
) is an extremely rare unknown gender first name. Much more prevalently, Wardenaar is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Wardenaar | Australia, United States, Canada, France, Netherlands |
| siem wardenaar Dutch sculptor and painter, NL (b. 1934) |
|