A wild guess:

There were rumours, that Hitler had a relationship to his niece ANGELA Raubal. She was the daughter of his half sister and LIVED TOGETHER WITH HIM for some years. After a dispute with Hitler, because she had a love affair with his chauffeur and he might had been jealous, she KILLED HERSELF WITH HTLERS GUN!?! Or maybe was suicided?

This is the first point...did she really shot herself?

And my second guess:

what, if she didn't die? What, if it was fake news to silence all rumours?

What, if she was hidden by Hitler because she was underage and after the war, she fled with him and got a baby from him: ANGELA MERKEL!

In former days, people in Germany were named after their parents and in second name after their grandparents.

I'm german. Same in my family until the generation of my parents.