Cognomen Peterko (Peterko 
) , in the entire world, is a rare family name. The surname Peterko is characteristic of Croatia, where it is a rare surname, Czechia, and Poland. Not in comparison with a country's population, it most frequently occurs in Poland, Germany, and Czechia. Also, Peterko is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Peterko | Germany, Czechia, Poland, United States, Croatia |