Family name Vassen (Vassen 
) , around the globe, is a rare cognomen. The surname Vassen is characteristic of Mauritius, where it is quite a rare surname, South Africa, where it is a rare surname, and Belgium. Measured by absolute frequency, it is commonest in South Africa, Germany, and the United States. Very seldom, Vassen is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Vassen | Germany, Mauritius, United States, South Africa, Belgium |
| franz anton vassen (b. 1799) |
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| wim vassen researcher ORCID ID = 0000-0002-3785-4865 |
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| victoria vassen researcher ORCID ID = 0000-0002-0128-5947 |
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