Probably friends or something. I don't think people would collude with such similar names..
I used to play a pc game, Diablo II, where I would multiaccount. It wasn't very hard to copy and open up miltiple copies of the same program, through a prog called sandbox, but you would have to have diff cd keys. They also had bots that you could use to MF or "magic find" for you, so you could get UBER LEET RUNES AND SOJS, or whatever lol.
But that was just a video game, an old one at that(still one of the best tho IMO).
To do this at a poker game
, would be dumb, and I'm sure you would get caught sooner or later. And if people do do it, I doubt they would be stoopid enough to use the same name.