Last name Виллумсен (Willumsen 
, Виллумсен 
) , in the world, is quite a rare cognomen. The last name Виллумсен is characteristic of Greenland, where it is a common surname, Denmark, where it is quite a common surname, and Norway. Not in comparison with a country's population, it most frequently occurs in Denmark, Norway, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Willumsen | Sweden, Norway, Australia, United States, Denmark |
| Виллумсен | Russia |