Cognomen Роцько (Rocko 
, Роцько 
) , throughout the world, is a rare family name. The surname Роцько is habitual in Latvia, where it is a rare surname, Lithuania, and Poland. Not in comparison with a country's population, it is the most numerous in Bangladesh, the United States, and Poland. Likewise, Роцько is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rocko | Bolivia, Mexico, United States, Poland, Bangladesh |
| Роцько | Russia, Ukraine |