Angels are very difficult to sex; you need to keep an eye out and see if you ever see it's breeding tube, which will be short and blunt if a female and longer and thinner if a male (having said that, spotting a breeding tube, especially if you have only the one isn't that likely!).
There's probably some fancy name someone somewhere has thought up, but nothing that springs to my mind. A normal, tank bred angel.
Don't get me wrong, I'm not trying to be rude about your fishie; he/she is very handsome!