Katrin Himmler (born 1967) is a German author. She is the granddaughter of Ernst Himmler (1905-1945), who was the younger brother of Heinrich Himmler, one of the leading figures of Nazi Germany. Therefore, she is the great-niece of Heinrich Himmler. She is the author of Die Brüder Himmler: Eine deutsche Familiengeschichte, published in English as The Himmler Brothers: A German Family History.
Katrin Himmler's book Die Brüder Himmler: Eine deutsche Familiengeschichte was published in 2005 in Germany by S. Fischer Verlag and in 2007 in English by Macmillan as The Himmler Brothers: A German Family History.
Her book traces the lives of the three Himmler brothers (the eldest was Gebhard Himmler), the sons of a respected secondary school headmaster in Munich. Gebhard served in the German Army in World War I, but Heinrich, who at 18 was still an officer cadet when the war ended, was too young to see frontline service. Katrin Himmler speculates that it was frustration at this and envy of his brother that led Heinrich to join the extreme right-wing Freikorps in 1919. In the Freikorps he served under Ernst Röhm and was thus led into the Nazi Party.
Despite her family being told her grandfather Ernst had had no interest in politics, Katrin discovered that he was an enthusiastic Nazi who had joined the party in 1931, and was also an officer in the Schutzstaffel (SS). Ernst was killed in the fighting in Berlin in April 1945.
"Many times during my research it was quite difficult for me to go on," Himmler told an interviewer in August 2007. "As things were revealed it became more and more shocking. We descendents were left in no doubt about what Heinrich had done. But his actions cast a large shadow that the rest of the family were standing in, many of them hiding in there."