The daughter is Merkel.
He didn't die in the Bunker
Also , there is some connection / belief that Adolf was a royal offspring , bastard?
Or as I see it Crown Prince Rudolf was a bastard, not the legitimate son of Emperor Franz Joseph; His mother Elizabeth spent most of her time away from her husband and had a lover in Bulgaria.
So that's why they staged the suicide pact with him and his fiance / love Baroness Mary Vetsara. It's she Vetsara who researchers believe from photo evidence is the grandmother of Merkel [staged death] Mother of Hitler. Hitler was put into another families household. So the supposed biological parents, Schicklgruber and Polzi are his foster parents.
Merkel is the daughter not the grand-daughter of Hitler, and likely granddaughter of Mary Vetsara and Rudolf the heir apparent to his father Emperor Franz Joseph, brought up by foster parents.
As far as a Rothschild connection; that may have been how the royals found the couple that would raise him, Since his presumed adopted grandmother, had worked in their house.
The rumor that Alois Schicklgruber was son of Meyer Rothschild was likely a cover. If you look at the photo you see there is zero resemblance.
People have remarked on the resemblance of Merkel to Vetsara