Throughout the world, Willum (Willum 
) is a very rare male first name. The given name Willum is habitual in Southern Asia, particularly Pakistan, where it is a very rare male name. Also, Willum is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Willum | Pakistan, India, Germany, Denmark, Netherlands |
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willum worm Danish judge (1633-1704), DK (b. 1633) |
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| willum mechlenburg DK (b. 1615) |
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| willum worm Danish judge (1698-1737) (b. 1698) |
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| willum murray (born 1861) (b. 1861) |
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willum þór þórsson Icelandic Football manager and politician, IS (b. 1963) |
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| willum steen Norwegian diplomat, NO (b. 1934) |
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| willum nielsen Danish cyclist |
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| willum geerts NL |
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| willum þór willumsson Icelandic footballer, IS (b. 1998) |
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