I really want to go the route of using a Roman or Greek Historical/Mythological Name or a distinct German Name. Some contenders are: Titus, Nero, Zeus, Atlas, Thor & Hans

Any other good ideas?

My male dobermans name is Zeus. He lives up to it, and it was also the name of magnum pi's dogs...zeus and apollo...

People will respect it. it's one syllable and easy to say with commands.

Also train him in German. That way only you have the commands...not everyone else and very few people will be able to make your dog do things...that makes YOU the boss. Dobermans are wonderful dogs but they are very strong willed.