Cognomen Williamsen (Williamsen 
) , all over the world, is a rare family name. The cognomen Williamsen is characteristic of Norway, where it is quite a rare surname, Denmark, where it is a rare surname, and the United States. Measured by absolute frequency, it is commonest in the United States, Norway, and Canada.
| VARIANT | COUNTRY |
|---|---|
| Williamsen | Norway, Sweden, United States, Canada, Denmark |
Williamson, Williamsson, Вільямсон, ויליאמסון, ウィリアムソン, and 威廉姆森
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jacob elias williamsen husband of Anna Olesdatter (b. 1853) |
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| anthony williamsen cyclist, US (b. 1880) |
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| vern g. williamsen American translator (1926-2014), US (b. 1926) |
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| odd w. williamsen (b. 1958) |
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| joe williamsen illustrator |
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| mark s. williamsen Ph.D. University of Wisconsin-Milwaukee 2010 |
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| max normann williamsen Norwegian footballer |
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