Cognomen Gansum (Gansum 
) , in all the world, is a very rare surname. The surname Gansum is habitual in Northern Europe, particularly Norway, where it is a rare surname. Much less frequently, Gansum is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gansum | India, Norway |
| terje gansum Norwegian archaeologist (b. 1967) |
|