Sophie, Princess of Prussia
Sophie Johanna Maria, Princess of Prussia( née" Princess of Isenburg", born 7 March 1978) is the wife of Georg Friedrich, Prince of Prussia, head of the House of Hohenzollern, members of which reigned as kings of Prussia and as German emperors until deposed in 1918.
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 Albert of Prussia (1809–1872)
Prince Frederick Henry Albert of Prussia (4 October 1809 – 14 October 1872) was the fifth son and youngest child of King Frederick William III of Prussia and Louise of Mecklenburg-Strelitz.
His parents had fled to East Prussia after the occupation of Berlin by Napoleon, and Albert was born in Königsberg.
Two of Albert's elder brothers were Frederick William IV, King of Prussia from 1840 till 1861, and William I, King of Prussia from 1861 to 1888 and German Emperor from 1871 until 1888.
Sophia of Minsk
Sophia of Minsk or Sophia of Polotsk( c. 1140 – 5 May 1198) was a Danish queen consort by marriage to King Valdemar I of Denmark, and a landgravine of Thuringia by marriage to Louis III, Landgrave of Thuringia.
Sophia Olelkovich Radziwill
Sophia Olelkovich Radziwill (Saint Sophia of Slutsk, Princess Sophia of Slutsk; May 1, 1585 – March 19, 1612) was a Lithuanian Orthodox Christian saint.
She was the last descendant of the family Olelkovich-Slutsk (princes of Slutsk and Kopyl) who were descended from Prince Algirdas.
She was canonized by the Orthodox Church in 1983.
The church of St. Sophia of Slutsk in Minsk is named after her.
Victoria, Princess Royal
Victoria, Princess Royal
(Victoria Adelaide Mary Louisa; 21 November 1840 – 5 August 1901) was German Empress and Queen of Prussia by marriage to German Emperor Frederick III.
She was the eldest child of Queen Victoria of the United Kingdom and Prince Albert of Saxe-Coburg and Gotha, and was created Princess Royal in 1841.
She was the mother of Wilhelm II, German Emperor.
Educated by her father in a politically liberal environment, Victoria was betrothed at the age of sixteen to Prince Frederick of Prussia and supported him in his views that Prussia and the later German Empire should become a constitutional monarchy on the British model.
Criticised for this attitude and for her English origins, Victoria suffered ostracism by the Hohenzollerns and the Berlin court.
This isolation increased after the rise to power of Otto von Bismarck (one of her most staunch political opponents) in 1862.
Victoria was empress for only a few months, during which she had opportunity to influence the policy of the German Empire.
Frederick III died in 1888 – just 99 days after his accession – from laryngeal cancer and was succeeded by their son William II, who had much more conservative views than his parents.
After her husband's death, she became widely known as Empress Frederick (German: "Kaiserin Friedrich").
The empress dowager then settled in Kronberg im Taunus, where she built Friedrichshof, a castle, named in honour of her late husband.
Increasingly isolated after the weddings of her younger daughters, Victoria died of breast cancer on 5 August 1901, not long after her mother's death on 22 January 1901.
The correspondence between Victoria and her parents has been preserved almost completely: 3,777 letters from Queen Victoria to her eldest daughter, and about 4,000 letters from the empress to her mother are preserved and catalogued.
These give a detailed insight into the life of the Prussian court between 1858 and 1900.
Anna Sophia of Prussia
Anna Sophia of Prussia (11 June 1527 – 6 February 1591) was Duchess of Mecklenburg by marriage to John Albert I, Duke of Mecklenburg.
Christian of Oliva
Christian of Oliva, also Christian of Prussia( died 4 December 1245) was the first missionary bishop of Prussia.
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.
Sophia of Prussia
Sophia of Prussia ("Sophia Dorothea Ulrike Alice"; 14 June 1870 – 13 January 1932) was Queen consort of Greece during 1913–1917 and 1920–1922.
A member of the House of Hohenzollern and daughter of Frederick III, German Emperor, Sophia received a liberal and anglophile education, under the supervision of her mother, Victoria, Princess Royal.
In 1889, less than a year after the death of her father, she married her third cousin Constantine, heir apparent to the Greek throne.
After a difficult period of adaptation in her new country, Sophia gave birth to six children and became involved in the assistance to the poor, following in the footsteps of her mother-in-law, Queen Olga.
However, it was during the wars which Greece faced during the end of the 19th and the beginning of the 20th century that Sophia showed the most social activity: she founded field hospitals, oversaw the training of Greek nurses, and healed wounded soldiers.
However, Sophia was hardly rewarded for her actions, even after her grandmother Queen Victoria decorated her with the Royal Red Cross after the Thirty Days' War: the Greeks criticized her links with Germany.
Her brother Emperor William II was indeed an ally of the Ottoman Empire and openly opposed the construction of the "Megali Idea", which could establish a Greek state that would encompass all ethnic Greek-inhabited areas.
During World War I, the blood ties between Sophia and the German Emperor also aroused the suspicion of the Triple Entente, which criticized Constantine I for his neutrality in the conflict.
After imposing a blockade of Greece and supporting the rebel government of Eleftherios Venizelos, causing the National Schism, France and its allies deposed Constantine I in June 1917.
Sophia and her family then went into exile in Switzerland, while the second son of the royal couple replaced his father on the throne under the name of Alexander I.
At the same time, Greece entered the war alongside the Triple Entente, which allowed it to grow considerably.
After the outbreak of the Greco-Turkish War in 1919 and the untimely death of Alexander I the following year, the Venizelists abandoned power, allowing the royal family's return to Athens.
The defeat of the Greek army against the Turkish troops of Mustafa Kemal, however, forced Constantine I to abdicate in favor of his eldest son George II in 1922.
Sophia and her family then were forced to a new exile, and settled in Italy, where Constantine died one year later (1923).
With the proclamation of the Republic in Athens (1924)
Sophia spent her last years alongside her family and died of cancer in Germany in 1932.

Question: Why did Sophia Of Prussia's mother die?
Answer: breast cancer