Family name Vilmundarson (Vilmundarson 
) , globally, is a very rare surname. The cognomen Vilmundarson is characteristic of Iceland, where it is quite a common surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Vilmundarson | United States, Iceland |
| karl vilmundarson Icelandic athletics competitor (1909-1983), IS (b. 1909) |
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| vilhjálmur vilmundarson Icelandic athletics competitor, IS (b. 1929) |
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| ragnar o vilmundarson researcher |
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