Compare Dr. Sivana vs John Constantine real name and family and other exciting information. We are also providing you with the comparison of alias, alter ego, family tree and love Interest of both the characters along with Dr. Sivana Real Name vs John Constantine Real Name. You can also check out the comparison list of artists who played Dr. Sivana and John Constantine in movies, animated films and TV series. Also compare the identity of these popular fictional characters in Dr. Sivana vs John Constantine real name.