Dude, let me introduce you to a phenomenon called Pareidolia
Just because you think you might have seen that, it doesn't mean it really was there.
As for the "Eva" identification, let me tell you about the concept of "reporting names". During the cold war, NATO had predetermined codenames for every piece of military equipment the Warsaw Pact fielded. If Intelligence reported a new piece of equipment, they would assign names from a predetermined list. Same thing is going on here (which is how, for example, Astaroths got their name. The computer just assigned the next name from the list automatically).