Prince Christian-Sigismund of Prussia (born March 14 1946) is one of the three paternal uncles of Georg Friedrich, Prince of Prussia, head of the House of Hohenzollern since 1994, which resigned over Germany until 1918.
He is the youngest of four sons born to Louis Ferdinand, Prince of Prussia (1907-1994) and Grand Duchess Kira Kirillovna of Russia (1909-1967). He was the heir presumptive to the headship of the deposed House of Hohenzollern from the death of his father to 20 January 2013, when Georg Friedrich fathered twin sons, relegating Christian-Sigismund to a more remote place in the Line of succession to the former German throne.
Biography-Dynastic Status
His two eldest brothers, Prince Friedrich Wilhelm (born 1939) and Prince Michael (born 1940) married commers in the mid-1960s and renounced their historical rights as Prussian princes. In 1975 his brother Prince Louis, Ferdinand Jr. 1944-1977), dynastically wed a mediatized Countess Donata of Castell-Rudenhausen (born 1950), but died accidentally during German military maneuvers two years later, leaving an only son, Georg Friedrich, as heir to the Hohenzollern legacy. Aware that his father strongly desired that he marry dynastically after his eldest brothers' morganatic marriages, Christian Sigismund nonetheless maintained that he did not feel unduly pressed: his eventual marriage to a countess, although non-mediatized, was also accepted as "equal" by his father.
Prior to his death, Louis Ferdinand Sr. made Georg Friedrich his principal heir, designing Christian Sigismund as guardian responsible for his education and management of his financial share in the Hohenzollern trust during his minority.
However, by the time of his nephew's marriage, alienation among the male dynasts in the family had become entrenched. After their father's death, Friedrich Wilhelm and Michael, whose marriages to commoners had ended in divorced, retracted their renunciations during their second marriages. Christian Sigismund's marriage having been recognized, he and his son remained Hohenzollern dynasts; nonetheless he joined his two surviving brothers in filing a lawsuit against Georg Friedrich to dissolve the Hohenzollern trust and obtain larger appanages. None of three brothers attended their nephew's wedding in 2011, although Christian Sigismund's son and younger daughter were in attendance.
Marriage and Issue
Prince Christian-Sigismund has three children. His first child was born from a relationship with Christiane Grandmontagne (later daughter-in-law of Count Lennart Bernadotte of Wisborg), whom he had legitimized:
-Isabelle-Alexandra Angelique Anne-Kathrine Grandmontagne, Princess of Prussia (born 18 September 1969)
He also has two children with his wife Countess Nina Helene Lydia Alexandra Reventlow (born 13 March 1954) whom he married on September 29 1984 at Gut Damp Ostsee in Holstein, daughter of Count Carl Ludwig Reventlow, and his second wife Nina Pryadkin.
-Prince Christian Ludwig Michael Friedrich Ferdinand of Prussia (born 16 May 1986), Princess Irina Maria Kira of Prussia (born 4 July 1988)
Title
14 March 1946 His Royal Highness Prince Christian-Sigismund of Prussia
House: Hohenzollern