It's possible that it was her married name, but that doesn't solve the other problem.
Wow. You wasted a whole paragraph on a logical nonsense that anyone could spot in a nanosecond and all you can say is it’s “possible” that it’s her married name. It’s “possible” that this entire conversation is a complete waste of time. Forgive me if I don’t further credit you as an expert on Bavarian childhood nicknames of the 1930s more than somebody who was there when you can’t even spot that a woman’s married name is different than her maiden name. Completely by the way, Slavic names are very common in Austria and Bavaria. I have relatives who had Slavic names (Polish and Czech) throughout the Nazi period in Germany and Austria. Even the blind alleys you would lead us down are fact free zones.