Prince Christian-Sigismund of Prussia
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 reigned 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.
Princess Elisabeth of Prussia
Princess Elisabeth of Prussia( 18 June 1815 – 21 March 1885) was the second daughter of Prince Wilhelm of Prussia and Landgravine Marie Anna of Hesse- Homburg and a granddaughter of Frederick William II of Prussia.
Prince Philip, Duke of Edinburgh is her great- great- grandson.
Prince Henry of Prussia (1862–1929)
Prince Albert William Henry of Prussia (14 August 1862 – 20 April 1929) was a younger brother of German Emperor William II and a Prince of Prussia.
He was also a grandson of Queen Victoria.
A career naval officer, he held various commands in the Imperial German Navy, eventually rose to the rank of Grand Admiral and Generalinspekteur der Marine.
Mihail Movilă
Mihail Movilă(? – 1608) is prince of Moldavia for a short time in 1607.
Princess Charlotte of Prussia (1831–1855)
Princess Charlotte of Prussia( 21 June 1831 – 30 March 1855), was by birth a Princess of Prussia and member of the House of Hohenzollern and by marriage Hereditary Princess of Saxe- Meiningen.
She was the eldest child and daughter of Prince Albert of Prussia( younger son of Frederick William III of Prussia and Louise of Mecklenburg- Strelitz) and his first wife Princess Marianne of the Netherlands( daughter of William I of the Netherlands and Wilhelmine of Prussia).
Prince Sigismund of Prussia (1864–1866)
Prince Francis Frederick Sigismund of Prussia( 15 September 1864 – 18 June 1866) was the fourth child and third son of Crown Prince Frederick William of Prussia( later King of Prussia and German Emperor as Frederick III), and Victoria, Princess Royal, eldest daughter of the British Queen Victoria.
He was born at the New Palace in Potsdam, Germany, in 1864 and known as" Sigi" to his family.
His mother found him much more intelligent than his three elder siblings and believed he would have great potential when he grew up.
However, he died from meningitis at the New Palace on 18 June 1866, aged twenty- one months.
He was buried in the royal mausoleum of the Friedenskirche at Potsdam.
His mother's grief and despair were intense as his father, leading the Prussian army into battle against Austria, had taken all available doctors thus making it impossible for her to alleviate the suffering of her child or prevent his death, the memory of which would haunt her for the rest of her life.
Prince Sigismund was the first grandchild of Queen Victoria to die, almost 115 years before his last cousin Princess Alice, Countess of Athlone, who died in 1981.
Prince Friedrich Sigismund of Prussia (1891–1927)
Prince Joachim Viktor Wilhelm Leopold Friedrich Sigismund of Prussia( 17 December 1891 – 6 July 1927) was a German World
War I fighter pilot and member of the House of Hohenzollern.
He was the son of Prince Friedrich Leopold of Prussia and Princess Louise Sophie of Schleswig- Holstein- Sonderburg- Augustenburg, married in 1916.
Prince Sigismund of Prussia (1896–1978)
Prince William Victor Charles Augustus Henry Sigismund of Prussia (27 November 1896 at Kiel – 14 November 1978 at Esparza, Costa Rica), was the second son of Prince Henry of Prussia and his wife, Princess Irene of Hesse and by Rhine.
He was a nephew of Kaiser Wilhelm II and Tsarina Alexandra of Russia.
A great-grandson of Queen Victoria through both his parents
, he was the only one of three brothers who did not have the hemophilia common among her descendants.
Christian of Oliva
Christian of Oliva, also Christian of Prussia( died 4 December 1245) was the first missionary bishop of Prussia.
Princess Barbara of Prussia
Princess Barbara of Prussia (2 August 192031 May 1994) was the only daughter and elder child of Prince Sigismund of Prussia and Princess Charlotte of Saxe-Altenburg.
She was a great-granddaughter of Frederick III, German Emperor and a great-great-granddaughter of Queen Victoria.
On 17 September 1952 she was legally adopted by her paternal grandmother, Princess Irene of Prussia ("née" Princess Irene of Hesse and by Rhine), a granddaughter of Queen Victoria.

Question: Which country Prince Sigismund Of Prussia (1896–1978)'s father is from?
Answer: German