Mod, I was trying to think of how to put it delicately. Of course, if my name were Tzvi he could call me “deerest”. I, in fact, knew someone named Tzvi who received a letter addressed “Dear Deer”.
Joseph,
1. I think he he has a problem. However, it is not even an aveira to do it.
2. Once he becomes an eved that is something else. However, he can even be freed to complete a minyan. So just find eight other men and decide to daven. Rav Moshe says (IM YD 1:162) that one may even buy him in order to free him and then do so.