Where is the Court of Owls? Or Ra's al Ghul and his family? Or Azrael and the Order of St Dumas?
Well, the point of the thread is not to make a list of Batman villains. Those already exist. The point is to test if you can match the alias of the villain to their name. As far as we know, Ra's al Ghul has no other name other than Ra's al Ghul. Talia, as far as we know, is also her actual name. So there's nothing to match there. For the same reason Bane isn't on the list either.
The Court of Owls and the Order of St Dumas are organisations, and thus outside the scope of this thread.
Azrael IS within the scope of this thread. But I regard Azrael not as well known for people on this forum to know his true name. I tried to stick with characters that are either really well known (such as Cat Woman), or who have a gimmicky real name that makes it easier to remember (Calendar Man).