I think he means that someone who's name sounds like a name. Something without random lettters, full of number, or a D at the end. Like SmellySocks isn't exactly a hero's type of name. Nor would be D U X, Brunokiller, baller_playa. You know what I mean? Quite the contrary. Dux, or dux bellorum, describes the legend of King Arthur in his earlier forms. I think that's a hero. Dux bellorum also means war leader, which could be a hero. ;)