yeah had this prolem
maybe you can try this list as a guide, its the naming policy though >> http://spacetimestudios.zendesk.com/...-naming-policy

Racial, ethnic, or national slurs.
Extreme sexuality.
Obscenities or vulgarities.
Harassing or defamatory names that insult other characters, players, employees or groups of players either in game or external.
Any Spacetime Studios employees.
References to human anatomy or bodily functions.
Connotations of major religions or religious figures.
References to trademarked or licensed property by a company or individual.
References to out of game advertising or solicitation.
References to illegal drugs or activities.