Always use the full brand name followed by the location name. Examples can be found below. 

Correct:

Hamburger Containerboard Division
Hamburger Containerboard
Hamburger Containerboard Pitten
Hamburger Containerboard Dunaújváros
Hamburger Containerboard Spremberg
Hamburger Containerboard Trostberg
Hamburger Containerboard Gelsenkirchen
Hamburger Containerboard Corlu
Hamburger Containerboard Denizli

Prinzhorn Group

Not allowed:

Hamburger
Hamburger Rieger
Hamburger Hungaria
Hamburger Austria