Robert Bradley (Rob Bradley) (aka Power Rob)
Robert Brylewski
Robert Buckley
Robert Calvert
Robert Cardenas
USA 
(East Los Angeles, California)
Entety, Engrave (USA), Masters Of Metal, Coffin Texts, Possessed, Diabolic, Agent Steel
(East Los Angeles, California) Entety, Engrave (USA), Masters Of Metal, Coffin Texts, Possessed, Diabolic, Agent Steel
Robert Carlson
USA (Minneapolis, Minnesota)
Mastiff (USA-1), Habitual Defilement, Glutton For Punishment, Krawg, Tempestuous
(Minneapolis, Minnesota) Mastiff (USA-1), Habitual Defilement, Glutton For Punishment, Krawg, Tempestuous
Robert Cepak
Robert Coronado (aka Abyssus, aka Stelok, aka Infernal Robert)
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Robert Czerwik
Robert Farrow
Robert Fudali (aka Rob Darken)
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Poland 
(Wrocław, Lower Silesian)
Graveland, Veles, Thoth, Infernum, Legion (PL-1), Darken (PL), Lord Wind, Lord Wind
(Wrocław, Lower Silesian) Graveland, Veles, Thoth, Infernum, Legion (PL-1), Darken (PL), Lord Wind, Lord Wind
Robert Gajewski
Robert Gene Johnson (aka Meaty Bob Johnson)
Robert Gregory Bourdon (aka Rob)
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Robert Hackl (aka Mournful Morales)
Robert Hampson
(London, Greater London) Robert Holt
Robert Jarman
Robert John 'Mutt' Lange
Robert Keller
Laden