Surname Siemieniak (Siemieniak 
) , around the globe, is a rare family name. The surname Siemieniak is habitual in Poland, where it is a rare surname, the United States, where it is a very rare surname, and Germany. Also, Siemieniak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Siemieniak | Germany, United States, Poland, Canada, France |