Across the world, Viljoen (Viljoen 
) is a very rare masculine given name. The given name Viljoen is habitual in South Africa, where it is a rare male name, and China, where it is an extremely rare boy's name. Predominantly, Viljoen is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Viljoen | Australia, Zambia, South Africa, United Kingdom, Namibia |
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constand viljoen South African military officer and politician (1933–2020), ZA (b. 1933) |
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| morris j. viljoen South African geologist, ZA (b. 1940) |
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| hein viljoen South African poet and professor, ZA (b. 1951) |
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| tian viljoen South African tennis player, ZA (b. 1961) |
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| lario viljoen researcher |
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