The names keep repeating. That's how she got name Angela. Usually the first born daughter had her mother's name, same for father-son duo… Or the name was recycled from aunts…
How she got from Hitler to Kasner? Josef Mengele escaped to Argentina. He was the one doing the experiments.
http:// www.spiegel.de/international/world/interview-with-mossad-agent-we-could-have-killed-mengele-a-576973.html