Family name Vanrossum (Vanrossum 
) , in all the world, is a rare cognomen. The cognomen Vanrossum is habitual in Belgium, where it is a rare surname, the United States, where it is a very rare surname, and Netherlands. Measured by absolute frequency, it is commonest in the United States, Indonesia, and Canada.
| VARIANT | COUNTRY |
|---|---|
| Vanrossum | Indonesia, Belgium, Netherlands, Canada, United States |