Most likely they would be killed like the Goebbels children. Hitler was afraid of what would happen to him upon and after capture, he would certainly have that for his kids. His wife did commit suicide with him too and knowing his ideology there wasn't life after defeat, so death was the only option for him and his family, much as it was for so much of Hitler's inner circle.
Joseph Goebbels, was a weak man, if you take into consideration other Prominet Nazi Children:
- Gudrun Burwitz, born Gudrun Himmler in 8 August 1929, the daughter of
Heinrich Himmler, was arrested and made to testify at the Nuremberg trials, after her fathers suicide. Having never renounced Nazi ideology, she has consistently fought to defend her father’s reputation, and has become closely involved in Neo-Nazi groups that give support to ex-members of the SS. She married Wulf Dieter Burwitz, an official of the far-right NPD.
- Edda Göring, born 2 June 1938, was the only child of
Hermann Göring. In the final stages of the war, she and her mother moved to their mountain home at Obersalzberg near Berchtesgaden. After the war, she went to a girls-only school, earned a degree from Ludwig Maximilian University of Munich and became a law clerk.
- Albert Speer, Jr., born 29 July 1934, the son of
Albert Speer, who was Adolf Hitler's chief architect, is himself an architect and urban planner.
- Martin Adolf Bormann, the eldest of the ten children of
Martin Bormann and
a godson of Adolf Hitler, became an ordained Roman Catholic priest and worked in Africa as a missionary.
- Rudolf von Ribbentrop born 11 May 1921, a former Waffen-SS Captain who served in World War II was the son of the Foreign Minister,
Joachim von Ribbentrop.
In the 1950s, Rudolf was involved in a legal battle with his cousin Otto Henkell over the control of the family firm, the wine producer Henkell & Co., and eventually became a partner in the firm. His brother Adolf Henkell-von Ribbentrop also joined the firm's partnership, and is the stepfather of former defence minister Karl-Theodor zu Guttenberg. In 2008, Rudolf published a biography of his father.
- Wolf Rüdiger Hess, 18 November 1937, the son of
Deputy Führer, Rudolf Hess. He went on to have three children.
- Niklas Frank, born 9 March 1939,
Hans Frank, the Nazi lawyer who became Governor-General of occupied Poland, is an author and journalist.
- Ernest Kaltenbrunner, Chief of the Reich Main Security Office and President of the ICPC, had three children, with wife and fellow party member, Elisabeth Eder
In addition to the children from his marriage, Kaltenbrunner had twins, Ursula and Wolfgang, (b. 1945) with his long-time mistress Gisela Gräfin von Westarp. All the children survived the war but the rest of their lives are unknown.
-
Alfred Rosenberg, the head of the German Working Party, before Hitler joined had a son who died in infancy and a daughter, Irene, who was born in 1930, she has refused contact with anyone seeking information about her father.
- SS-Obergruppenführer
Reinhard Heydrich, had four children, Klaus Heydrich (June 17, 1933-1943) Heider Heydrich (born December 23, 1934) Silke Heydrich (born April 9, 1939) Marte Heydrich (born July 23, 1942) Apart from Klaus who died on October 24, 1943; bike-traffic accident, the rest of their lives are unknown