Globally, Willien (Willien 
) is a rare predominantly feminine, but very infrequently boy's first name. The forename Willien is habitual in South Africa, where it is a very rare feminine name, Brazil, and Philippines, where it is a very rare unisex name. Also, Willien is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Willien | Indonesia, South Africa, United States, France, Brazil |
| willien nedrebø Norwegian writer (b. 1866) |
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| willien van wieringen NL (b. 1964) |
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