We had our name picked out literally years before we got our GSD. My gf and I are huge fans of Xena Warrior Princess so obviously we named our Golden Retriever Xena when we got her 9 years ago. What male name would go with Xena? Ares, God of War of course! I think you should pick out a name that means a lot to you, only you would know what that name is. It's kind of like a tattoo, lol - you can't let anyone else pick that for you.
Having said that.... I have back up names that I had in mind for Ares just in case... Semper Fi, Jax, Scooby Doo, Monster, Zeus, Commander Shepherd, Kratos... I even considered naming him like a horse - like "Run for the Money" or "I'll Raise You Twenty!" but that would be really hard to yell out at the dog park, haha!