Family name Willien (Willien 
) , globally, is a rare cognomen. The cognomen Willien is habitual in France, where it is a rare surname, Italy, where it is a very rare surname, and Venezuela. Not in comparison with a country's population, it is commonest in France, the United States, and Italy. Also, Willien is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Willien | Indonesia, South Africa, Brazil, France, United States |
|
renato willien Italian writer, photographer and mountaineer, IT (b. 1916) |
|
| pierre willien |
|