My thought is, is that anyone who would get a big and relatively rare breed traditionally used for fighting and hunting, and name him "Gladiator Maximus", is probably not the ideal dog owner.
"Gladiator Maximus" is not exactly a family pet name. It soulds remarkably like something you'd see on one of those "bloodline" charts the dogfighters love so much.
If I had to guess, I'd imagine this dog's owner is somebody with an ego problem, who needs to use a "tough"-looking dog to feel better about themselves. Unlike the Dogo Argentino, such is a common breed of human.
slops, gloops, and gruels.