Prince Christian Oscar of Hanover
Prince Christian Oscar of Hanover (1 September 1919 – 10 December 1981) was the fourth child of Ernest Augustus, Duke of Brunswick and his wife Princess Victoria Louise of Prussia, the only daughter of Wilhelm II, German Emperor and Augusta Viktoria of Schleswig-Holstein.
Princess Olga of Hanover
Princess Olga of Hanover and Cumberland( 11 July
1884 – 21 September 1958) was the youngest daughter of Ernest Augustus, Crown Prince of Hanover( 1845 – 1923) and Princess Thyra of Denmark( 1853 – 1933), the youngest daughter of Christian IX of Denmark( 1818–1906) and Louise of Hesse- Kassel( 1817–1898).
Olga was a great- great- granddaughter of George III of the United Kingdom and Charlotte of Mecklenburg- Strelitz.
Princess Olga resided with her family at Gmunden and remained unmarried throughout her life.
In 1958, shortly before Olga's death, her nephew Ernest Augustus, Prince of Hanover, and his wife Princess Ortrud of Schleswig- Holstein- Sonderburg- Glücksburg named their daughter, born in 1958, Olga in her honour.
Olga died of natural causes at her home, Hubertihaus, near Gmunden on 21 September 1958.
Alexandra, Princess of Leiningen
Princess Alexandra of Hanover, Duchess of Brunswick- Lüneburg, Princess of Leiningen( born 18 February 1959), is the wife of Andreas, 8th Prince of Leiningen.
Born in Hanover, Lower Saxony, Germany, Alexandra is the youngest daughter of Ernest Augustus, Prince of Hanover( 1914 – 1987), and his wife, Princess Ortrud of Schleswig- Holstein- Sonderburg- Glücksburg( 1925–1980).
Her eldest brother is Ernst August, Prince of Hanover, current head of the House of Hanover and her sister- in- law is Princess Caroline of Monaco.
Frederica of Mecklenburg-Strelitz
Frederica of Mecklenburg-Strelitz ("Friederike Louise Caroline Sophie Charlotte Alexandrine") (3 March 1778 – 29 June 1841) was a German princess who became, by marriage, princess of Prussia, princess of Solms-Braunfels, Duchess of Cumberland in Britain and Queen of Hanover (in Germany) as the consort of Ernest Augustus, King of Hanover (the fifth son and eighth child of King George III).
She was born in the "Altes Palais" of Hanover as the fifth daughter of Charles II, Duke of Mecklenburg-Strelitz, and his first wife, Frederica, daughter of Prince George William of Hesse-Darmstadt.
Her father assumed the title of Grand Duke of Mecklenburg on 18 June 1815.
Duchess Frederica was the niece of her future mother-in-law, Queen Charlotte, through her father.
Ernest Augustus, King of Hanover
Ernest Augustus (5 June 177118 November 1851) was King of Hanover from 20 June 1837 until his death.
As the fifth son of King George III of the United Kingdom and Hanover, initially he seemed unlikely to become a monarch, but none of his elder brothers had a legitimate son.
Ernest succeeded in Hanover under Salic law, which debarred women from the succession, ending the personal union between Britain and Hanover that had begun in 1714.
Ernest was born in London but was sent to Hanover in his adolescence for his education and military training.
While serving with Hanoverian forces near Tournai against Revolutionary France, he received a disfiguring facial wound.
He was created Duke of Cumberland and Teviotdale in 1799.
Although his mother Queen Charlotte disapproved of his marriage in 1815 to her twice-widowed niece, Frederica of Mecklenburg-Strelitz, it proved happy.
The King's eldest son, George, Prince of Wales (later George IV), had one child, Charlotte, who was expected to become the British queen, but she died in 1817, giving Ernest some prospect of succeeding to the British throne as well as the Hanoverian one.
However, his older brother Edward Augustus, Duke of Kent, fathered the eventual British heir, Victoria, in 1819 shortly before the birth of Ernest's only child, George.
Ernest was an active member of the House of Lords, where he maintained an extremely conservative record.
There were persistent allegations (reportedly spread by his political foes) that he had murdered his valet, had fathered a son by his sister Sophia, and intended to take the British throne by murdering Victoria.
Following the death of his brother King William IV, Ernest became Hanover's first resident ruler since George I.
He had a generally successful fourteen-year reign but excited controversy near its start when he dismissed the Göttingen Seven, including the two Brothers Grimm, from their professorial positions for agitating against his policies.
A revolution in 1848 was quickly put down in Hanover.
Hanover joined the German customs union in 1850 despite Ernest's reluctance.
He died the next year and was succeeded by his son George.
Countess Monika zu Solms-Laubach
Monika, Princess of Hanover, Duchess of Brunswick- Lüneburg( born Countess Monika zu Solms- Laubach; 8 August 1929 – 4 June 2015) was a German noblewoman and philanthropist.
She was the second wife of Ernest Augustus, Prince of Hanover.
A member of the House of Solms- Laubach by birth, she became the Princess Consort of Hanover and Duchess of Brunswick- Lüneburg through her marriage.
She was the founder of the Dollhouse Museum in Laubach.
Ernest Augustus, Duke of Brunswick
Ernest Augustus( Ernest Augustus Christian George;; 17 November 1887 – 30 January 1953) was the reigning Duke of Brunswick from 2 November 1913 to 8 November 1918.
He was a grandson of George V of Hanover, whom the Prussians had deposed from the Hanoverian throne in 1866, and Christian IX of Denmark.
Clara Elisabeth von Platen
Clara Elisabeth, Countess von Platen - Hallermund (14 January 1648 - 30 January 1700, Schloss Monplaisir, in what is now the Von-Alten-Garten in Hannover) was a German noblewoman, most notable as the mistress of Ernest Augustus (Elector of Hanover, father of George I of Great Britain) and for her involvement in the Königsmarck Affair.
Sophia Charlotte of Hanover
Sophia Charlotte of Hanover( 30 October 1668 – 1 February 1705) was the first Queen consort in Prussia as wife of King Frederick I.
She was the only daughter of Elector Ernest Augustus of Hanover and his wife Sophia of the Palatinate.
Her eldest brother George Louis succeeded to the British throne in 1714 as King George I.
Sophia of Hanover
Sophia of Hanover( born Sophia of the Palatinate; 14 October 1630 – 8 June 1714) was the Electress consort of Hanover from 1692 to 1698.
As a Protestant granddaughter of James I, she became heir presumptive to the crowns of the Kingdom of England and the Kingdom of Ireland under the Act of Settlement 1701.
After the Acts of Union 1707, she became heir presumptive to the unified throne of the Kingdom of Great Britain.
She died less than two months before she would have become queen succeeding her first cousin once removed, Queen Anne, and her claim to the throne passed on to her eldest son, George Louis, Elector of Hanover, who ascended as George I on 1 August 1714( Old Style).
Born to Frederick V of the Palatinate, a member of the House of Wittelsbach, and Elizabeth Stuart, in 1630, Sophia grew up in the Dutch Republic, where her family had sought refuge after the sequestration of their Electorate during the Thirty Years' War. Sophia's brother Charles Louis was restored to the Lower Palatinate as part of the Peace of Westphalia.
Sophia married Ernest Augustus of Brunswick- Lüneburg in 1658.
Despite his jealous temper and frequent absences, Sophia loved him, and bore him seven children who survived to adulthood.
Initially a landless cadet, Ernest Augustus succeeded in having the House of Hanover raised to electoral dignity in 1692.
Therefore, Sophia became Electress of Hanover, the title by which she is best remembered.
A patron of the arts, Sophia commissioned the palace and gardens of Herrenhausen and sponsored philosophers, such as Gottfried Leibniz and John Toland.

Question: When did Ernest Augustus, King Of Hanover's wife die?
Answer: 29 June 1841