Prince Karl Franz of Prussia
Prince Karl Franz of Prussia (15 December 1916 – 23 January 1975) was the only child of Prince Joachim of Prussia and his wife Princess Marie-Auguste of Anhalt. His father was the youngest son of Wilhelm II, German Emperor, himself a grandson of Queen Victoria, which made Prince Karl a great-great-grandson of the British queen.
Early life 
Prince Karl Franz was born on 15 December 1916 in Potsdam. He was the only child born to Prince Joachim of Prussia by his wife Princess Marie-Auguste of Anhalt. Karl Franz was the Emperor's fourth grandchild to be born since World War I began; he was consequently very young when Hohenzollern fortunes fell. His grandfather abdicated in 1918, and his father Prince Joachim committed suicide in 1920. At the time of his grandfather's abdication, Prince Karl Franz was twelfth in line of succession to the German and Prussian thrones.
After his father's suicide, Karl Franz was taken into custody by his paternal uncle Prince Eitel Friedrich of Prussia. As the legal head of the House of Hohenzollern, he claimed this right because Emperor Wilhelm had issued an edict placing Hohenzollern powers in Eitel's hands. This was later declared to have been illegal, and his mother was given full custody of him in 1921. She was given this right despite the fact that she had run away from her husband and that there had been numerous servants testifying against her. Eitel's defense had also stated that Marie-Auguste was not a fit person for Karl Franz's guardianship. Marie-Auguste went to court however and made a plea that she was heartbroken, which may have helped win the case for her.
In 1922, Marie-Auguste sued ex-Emperor Wilhelm for financial support that had been promised in her and Joachim's marriage contract. Wilhelm's attorney argued that the House of Hohenzollern laws were no longer valid, and therefore there was no obligation to support her.
In 1926, his mother remarried to Johannes-Michael Freiherr von Loën. They were divorced in 1935.
On 5 October 1940, Karl Franz married Princess Henriette Hermine Wanda Ida Luise of Schönaich-Carolath. She was a daughter of Princess Hermine Reuss of Greiz, who had been the second wife of Karl Franz's grandfather Emperor Wilhelm II since 1922 (Henriette was thus Kaiser Wilhelm's stepdaughter). Held at Wilhelm's private residence without much ceremony, he and Hermine attended the ceremony, as did a few other guests. The Mayor of Doorn performed the ceremony.
They had three children:
- Prince Franz Wilhelm Viktor Christoph Stephan of Prussia (born 3 September 1943), he married the pretender to the Russian throne Maria Vladimirovna of Russia. Their child is George Mikhailovich of Russia, Prince of Prussia, born 13 March 1981 in Spain.
- Prince Friedrich Christian Ludwig of Prussia (3 September 1943 – 26 September 1943)
- Prince Franz Friedrich Christian of Prussia (born 17 October 1944).
They divorced 5 September 1946.
Karl Franz married secondly, morganatically, on 9 November 1946, to Luise Dora Hartmann (5 September 1909 Hamburg, Germany – 23 April 1961 Hamburg, Germany). The couple were childless and divorced in 1959.
Prince Karl married lastly, on 20 July 1959 in Lima, Peru, to Doña Eva Maria Herrera y Valdeavellano (10 June 1922 Lima, Peru – 6 March 1987 Lima, Peru). They were married until Prince Karl's death and had two daughters;
- Alexandra Maria Augusta Juana Consuelo Prinzessin von Preussen (born 29 April 1960 Lima, Peru). She married Alberto Reboa on October 1995 in Lima, Peru. They have two children:
- Alberto Reboa von Preussen (b.1994)
- Alexandra Reboa von Preussen (b.1995)
- Désirée Anastasia Maria Benedicta Prinzessin von Preussen (born 13 July 1961 Lima, Peru). She married Juan Carlos Gamarra y Skeels on 25 May 1983 at Lima, Peru. They have two children:
- Juan Francisco Gamarra von Preussen (b.1987)
- Ines Gamarra von Preussen (b.1989).
- "Kaiser's Youngest Son, Joachim Shoots Himself", The New York Times (Berlin), 18 July 1920
- "New Grandson For Kaiser", The New York Times (Berlin), 16 December 1916
- "Get's Ex-Kaiser's Grandson", The New York Times (Berlin), 14 October 1921
- "Hohenzollern Laws Ruled Out of Court", The New York Times (Berlin), 28 July 1921
- "Widow of Young Prince Sues Kaiser For Support", The New York Times (Berlin), 6 January 1922
- "Princess Joachim Weds", The New York Times (Berlin), 29 September 1926
- "Kaiser's Grandson is Killed in Action", The New York Times (Berlin), 17 September 1939
- "German Prince Married", The New York Times (Doorn, Netherlands), 2 October 1940
- "Ex-Kaiser's Stepdaughter To Marry His Grandson", The New York Times (Amsterdam), 7 August 1940