Yeah, second Jackson. I think the three letter names (or the names that shorten to good three letters) are good like Moe, Joe, Max, Fin, Jim, Leo, but I'd stay away from Bob and Tad (no offense meant Bob's and Tad's of the world). Brock is pretty manly sounding and if he turned to rap he could go by B-Rock. The Leo names are good, Leo, Leon, Leonard, Leonardo.
"I missed the memo on this tradition of male messing with each other long ago, women don't do that sort of thing.
I know now I've probably deep-sixed more than a few developing friendships because of misinterpreting that.