The emblem underneath the cockpit repreents an 'R' for Richthofen, and is the unit emblem of
Jagdgeschwader 2 "Richthofen".
Here is a page about this fighter unit:
http://www.lexikon-der-wehrmacht.de/...ader/JG2-R.htm
The name 'Romana' has nothing to do with Rumania. Most probably it was indeed the name of the pilot's girlfriend.
Finally, the photo appears to me to be a reproduction.