It's a slight exaggeration, but the core appears to be true. Wikipedia has a page on the Hitler family and what happened to it, which sources a lot of its information from The Last of the Hitlers by David Gardner. In that book, he tracks down and interviews the surviving members of the family. First generation Hitler had a sister, a half-brother, and a half-sister who survived into adulthood and could have had children. None of them lived past 1960, although both half-siblings had children. He also had two sister-in-laws. One sister-in-law never married and never had any kids. The other had one daughter, who committed suicide in 1971 (for unrelated reasons). It's highly unlikely there was any sort of "pact" in this generation - all Hitler's siblings (of all sorts) had children or not based on their own lives, and wouldn't have that decision affected by his reputation. Second generation A