There is a Marrianne Scwab who was born a Rothschild who lived in Frankfurt at about the right time to be Klaus's mother. People are spreading that this is his mother. It's not. Klaus's family never lived in Frankfurt. There are many people called Schwab in Germany!

There is a bit of a mystery to Klaus's parentage, but this is not it. His actual mother appears to have abandoned the family after his birth. His dad remarried and that woman is called his mother. She's from a Swiss banking family. His biological mother is alleged to be Jewish and have emigrated to America. I'm not sure if the Jewish thing about his biological mother is true though. Giselle Scwab is her married name.