Yeah, because a RO server that does not has RO in the name would not really be RO. It's like a tradition!
I remember back when all the private servers simply picked a letter from the alphabet. lro, tro, bro, there werent even enough official servers to take away such names, nor enough private servers to need more!
You could get cheesy with the name, too. ROck&ROll RO. Called ROx3 for short.