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.
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.
Obata Toramori
He was the father of Obata Masamori.
Countess Donata of Castell-Rüdenhausen
Countess Donata of Castell- Rüdenhausen( German:" Donata Gräfin zu Castell- Rüdenhausen"; 20 June 1950 – 5 September 2015) was a German noblewoman.
She was the daughter of( 1916–2007), head of the Rüdenhausen branch of the House of Castell, and his wife, Countess Irene of Solms- Laubach( 1925–2006).
She was the mother of Prince Georg Friedrich of Prussia( born 1976) the current head of the House of Hohenzollern, the ruling dynasty of the German Empire and of the Kingdom of Prussia until 1918.
Christian of Oliva
Christian of Oliva, also Christian of Prussia( died 4 December 1245) was the first missionary bishop of Prussia.
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.
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.
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).
Cleomenes II
Cleomenes II( died 309 BC) was Agiad King of Sparta from 369 to 309 BC.
The son of Cleombrotus I, he succeeded his brother Agesipolis II.
He was the father of Acrotatus I, the father of Areus I, and of Cleonymus, the father of Leonidas II.
Georg Friedrich, Prince of Prussia
Georg Friedrich Ferdinand, Prince of Prussia( born 10 June 1976) is a German businessman who is the current head of the Prussian branch of the House of Hohenzollern, the former ruling dynasty of the German Empire and of the Kingdom of Prussia.
He is the great- great- grandson and historic heir of Wilhelm II, the last German Emperor and King of Prussia, who abdicated and went into exile upon Germany's defeat in World War I in 1918.

Question: Where was the father of Princess Barbara Of Prussia born?
Answer: Kiel