Family name Rocko (Rocko 
, Roquette 
, Rocken 
) , all around the world, is quite a rare last name. The cognomen Rocko is habitual in Portugal, where it is quite a common surname, Puerto Rico, where it is quite a rare surname, and Uruguay. In absolute terms, the name is most common in Portugal, France, and Brazil. Much less frequently, Rocko is the forename as well as the last name.