Family name Klessens (Klessens 
) , all over the world, is a rare surname. The surname Klessens is habitual in Netherlands, where it is quite a rare surname, Belgium, where it is a rare surname, and Canada, where it is a very rare surname. In absolute terms, it most frequently occurs in Netherlands, Belgium, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Klessens | Belgium, Australia, United States, Canada, Netherlands |