Surname Siefen (Siefen 
) , in the world, is a rare family name. The surname Siefen is characteristic of Finland, where it is a rare surname, Germany, and France, where it is an extremely rare surname. In absolute terms, it most frequently occurs in Germany, Finland, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Siefen | Germany, Spain, United States, Finland, France |
| hans-peter siefen FI (b. 1983) |
|
Mr, Kostja, Rainer, Thomas, Tobias, Victor, Ulrich, Manfred, Michael, Andreas, Bastian, Jürgen, Florian, William, Sergebea, Jennifer, Wilfried, Wolfgang, Christian, Christina, Markus, Martin, Yassa, Horst, Ms, Kia, Jan, Isy, Udo, Kimi, Paul, Ralf, Dirk, Guillaume, John, Sarah, Sonja, Cheri, Peter, Doris, Laura, Tanja, Terri, Hanna, Nils, and Hans-Peter