Today, this feature has been removed on Xbox 360, and the Xbox One never had this feature even though many people wanted it.
Xbox 360 Players used to be able to choose between the following four following Gamer Zones ; Recreation, Pro, Family and Underground.
It had been said that Gamer Zones affected your matchmaking and would pair you with players that had the same or a similar Gamer Zone . Your choice of gamer zone determines which game sessions you are most likely to join.
Player matchmaking helps you find sessions with other players from the same gamer zone.
Here we have a list of hundreds of good clan names to ease your search, have fun.