Marie of Saxe-Altenburg
Princess Marie of Saxe-Altenburg (Alexandrina Mary Wilhelmina Catherine Charlotte Theresa Henrietta Louise Pauline Elizabeth Frederica Georgina; ; 14 April 1818 – 9 January 1907) was Queen of Hanover and the consort of George V, a grandson of George III of the United Kingdom and Queen Charlotte.
Princess Marie of Hanover
Princess Marie of Hanover (2 December 1849 – 4 June 1904) was the younger daughter of King George V of Hanover and of his wife, Princess Marie of Saxe-Altenburg.
Princess Alexandra of Hanover (born 1999)
Princess Alexandra of Hanover( Alexandra Charlotte Ulrike Maryam Virginia; born 20 July 1999) is the only child of Princess Caroline of Monaco and Prince Ernst August of the defunct Kingdom of Hanover.
Countess Marie von Hochberg
Princess Marie of Hanover( born 26 November 1952 in Pattensen, Lower Saxony, Germany), is the wife of Count Michael von Hochberg.
Prince Nikola of Yugoslavia (born 1958)
Prince Nikola of Yugoslavia( born 15 March 1958), also known as Nikola Karađorđević, is a member of the House of Karadordevic.
Currently fifth in the line of succession to the defunct Yugoslavian throne, he is also in the line of succession to the British throne as a great- grandson of Princess Marie of Edinburgh, herself a granddaughter of Victoria of the United Kingdom.
Princess Henriette of Belgium
Princess Henriette of Belgium, later Princess Henriette of Orléans, Duchess of Vendôme( 30 November 1870 – 28 March 1948), was the daughter of Prince Philippe, Count of Flanders, and Princess Marie of Hohenzollern- Sigmaringen.
She was the younger twin sister of Princess Joséphine Marie of Belgium, who died at the age of six weeks in 1871.
Princess Marie of Denmark
Princess Marie of Denmark, Countess of Monpezat,(" née" Marie Agathe Odile Cavallier, born 6 February 1976) is the second wife of Prince Joachim of Denmark.
Princess Marie of Liechtenstein (b. 1959)
Princess Marie of Liechtenstein(" née" Princess Marie Isabelle Marguerite Anne Geneviève of Orléans; born Boulogne- Billancourt, France on 3 January 1959) is the eldest daughter of Prince Henri, Count of Paris, Duke of France and his former wife Duchess Marie Thérèse of Württemberg.
She is the wife of Prince Gundakar of Liechtenstein, a great- grandson of Prince Alfred of Liechtenstein.
Prince Ernst August of Hanover (born 1954)
Ernst August, Prince of Hanover( born 26 February 1954), is head of the royal House of Hanover which held the thrones of the United Kingdom until 1901, of the former Kingdom of Hanover until 1866, and of the sovereign Duchy of Brunswick from 1913 to 1918.
As the husband of Princess Caroline of Monaco, he is the brother- in- law of Albert II, Prince of Monaco.
Princess Marie of Hohenzollern-Sigmaringen
Princess Marie of Hohenzollern-Sigmaringen, later Princess Marie of Belgium, Countess of Flanders (Marie Luise Alexandrine Karoline; 17 November 1845 – 26 November 1912) was a Princess of Hohenzollern-Sigmaringen, later simply of Hohenzollern, and mother of King Albert I of Belgium.

Question: When was Princess Marie Of Hanover's mother born?
Answer: 14 April 1818