Yes, in Greek Mythology, Μορφέας was the God of dreams, and sometimes even appeared in people's dreams, instead of just creating them,
Also in Greek, spelling sounds like Morpheas, and thats how it is pronounced. So my nick is morpheas(768).
Banned because the strong painkiller drug you're talking about is Morphine, and you can guess where it got its name from 
That would be all.