Publication: This is the family tree compiled by Yaakov Hamburger in the later part of his life. Compiled mainly from family source and records from Standesame and Stadt Alzenau i.Uff., Germany. Based upon "Juden-Matrikel Der Israelitischen Gemeinden Alzenau and Wasserlos"

Publication: SHIR HAMA’ALOS MY KATZ FAMILY MEMOIRS From Dire Peril to Safety and Abundance Bert Katz
  Text: My parents, Willy Katz and Martha Hamburger Katz, were married on November
14, 1928 ‎(Rosh Chodesh Kislev 5689)‎ at the Klein Restaurant in the city of Hanau
am Main, by the Provincial Rabbi Doltradenitz. Papa’s parents were the Master
Shoemaker Jakob Katz and his late wife Rosa Neuhaus Katz. Mama’s parents were
the merchant Bernhard Hamburger and his wife Sara Kaufmann Hamburger, who
lived in Alzenau, Unterfranken, which is Lower Franconia

Publication: SHIR HAMA’ALOS MY KATZ FAMILY MEMOIRS From Dire Peril to Safety and Abundance Bert Katz