Surname Siepko (Siepko 
) , in the world, is a rare family name. The cognomen Siepko is characteristic of Brazil, where it is a very rare surname, and the United States, where it is an extremely rare surname. Also, Siepko is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Siepko | Netherlands, Canada, Brazil, Poland, United States |