There are at least two bands with the name Grog. A Portuguese death metal one and Czech hard rock one. Origin: Portugal (Oeiras)
Formed in: 1991. They haven´t recorded a new record since 2001, but are still playing on festivals etc. Rolando Barros - Drums (Nephtys, Neoplasmah, Sacred Sin, The Firstborn, Filii Nigrantium Infernalium)
Ivo Martins - Guitar (ex-Painstruck, Putregod)
Pedro Pedra - Vocals
Hugo Andremon - Guitar (Simbiose, Filii Nigrantium Infernalium, The Sorcerer , Hellfuck)
Alexandre Ribeiro - Bass (Bleeding Display, Neoplasmah, Neurotic)

Read more about Grog on Last.fm.