According to Toronto Sun columnist Mark Bonokoski, Zündel's mother was Gertrude Mayer, daughter of Isadore and Nagal Mayer.[46] Isadore Mayer was a trade union organiser for the garment industry in the Bavarian city of Augsburg.[46]
According to Bonokoski, Ernst's ex-wife, Irene Zündel, claimed that the possibility of being at least part Jewish bothered Zündel so much that he returned to Germany in the 1960s in search of his family's Ariernachweis, a Third Reich certificate of pure Aryan blood, but was unable to find any such document for his family.[46]
In 1997, Zündel granted an interview to Tsadok Yecheskeli of the Israeli newspaper, Yedioth Ahronoth, that includes the following exchange:
Zundel: If you are fishing for any political information, my father was a Social Democrat, my mother a simple Christian woman. Her father had been a union organizer in Bavaria, and of the garment workers' union. His name got him into trouble because it was Isadore Mayer and, of course, he was called Izzy by his people and the people thought he …
Yecheskeli: Was Jewish?
Zundel: No, I don't ... don't think so.
Yecheskeli: Are you sure there's no Jewish blood in your family?
Zundel: No.[46]
https://en.wikipedia.org/wiki/Ernst_Z%C3%BCndel#Ancestry
