Should C ++ namespaces be merged into companies namespace?

Java packages usually use the company prefix (com.example.department.project ....), is this usually done in C ++?

If I am developing a library, should I wrap the namespace in the company name? Something like

namespace company {
    namespace project {
        ...
    }
}

      

        
        
        
      

    

Is this usually done in real C ++ practice? And even if this is not a common practice, when starting a new project of a new C ++ 11/14 project, is it a good idea to do it?