Question: Prince Ludwig of Hesse and by Rhine is the eldest song of a princess born in which year ?
Context: Princess Cecilie of Greece and Denmark (Greek: Πριγκίπισσα Καικιλία της Ελλάδας και Δανίας ) (22 June 1911 – 16 November 1937) was the wife of Hereditary Grand Duke Georg Donatus of Hesse and third eldest sister to Prince Philip, Duke of Edinburgh. Princess Irene of Hesse and by Rhine ("Irene Luise Marie Anne, Princess of Hesse and by Rhine", 11 July 1866 – 11 November 1953) was the third child and third daughter of Princess Alice of the United Kingdom and Louis IV, Grand Duke of Hesse and by Rhine.  Her maternal grandparents were Queen Victoria and Prince Albert of Saxe-Coburg and Gotha.  Her paternal grandparents were Prince Charles of Hesse and by Rhine and Princess Elizabeth of Prussia.  She was the wife of Prince Henry of Prussia, a younger brother of Wilhelm II, German Emperor and her first cousin.  The SS "Prinzessin Irene", a liner of the North German Lloyd was named after her. "Chains" is the final episode of the BBC sitcom "Blackadder II", the second series of "Blackadder", which was set in Elizabethan England from 1558 to 1603.  Power-mad and self-professed "master of disguise", Prince Ludwig the Indestructible kidnaps Lord Blackadder and Lord Melchett.  They escape his clutches but Prince Ludwig infiltrates the palace during a fancy dress ball. Infanta Amalia of Spain (Spanish: "Amalia de Borbón y Borbón-Dos Sicilias" ; 12 October 1834 – 27 August 1905) was the youngest daughter of Infante Francisco de Paula of Spain.  Her eldest brother, Francisco de Asís married Queen Isabella II of Spain, who was Amalia's first cousin.  She was the only one of five sisters who made a royal marriage.  In 1865 she married Prince Adalbert of Bavaria, a son of King Ludwig I of Bavaria.  Upon her marriage she moved to Munich, where she spent the rest of her life.  However she remained attached to her native country and was instrumental in arranging the marriage of her eldest son Prince Ludwig Ferdinand of Bavaria with her niece Infanta Paz of Spain. The Electorate of Hesse was abolished in 1866 when it was annexed by the Kingdom of Prussia, while the Grand Duchy of Hesse and by Rhine came to an end in 1918.  Like most former German realms of the Holy Roman Empire the succession in Hessian lands was semi-Salic, with the nearest female kinswoman of the last male inheriting the crown upon extinction of the dynasty in the male line.  The current pretender to both Hessian thrones is Donatus, Landgrave of Hesse, from the electoral line of the family, which inherited its claim to the grand duchy following the death of Prince Louis of Hesse and by Rhine in 1968.  Donatus became head of the House of Hesse on the death of his father, Prince Moritz, in 2013.  Landgrave Donatus is the titular Grand Duke and Elector of Hesse. Princess Marie of Hesse and by Rhine (Prinzessin Marie Viktoria Feodore Leopoldine von Hessen und bei Rhein, 24 May 1874 – 16 November 1878), was the youngest child and fifth daughter of Ludwig IV, the Grand Duke of Hesse and his first wife Princess Alice of the United Kingdom.  Her mother was the second daughter of Queen Victoria and Prince Albert of Saxe-Coburg-Gotha.  She died of diphtheria at the age of four and was buried with her mother, who died a few weeks later of the same disease.  She and Queen Victoria shared the same birthday. The Battenberg family was formally a morganatic branch of the House of Hesse-Darmstadt, rulers of the Grand Duchy of Hesse in Germany.  The first member was Julia Hauke, whose brother-in-law Grand Duke Louis III of Hesse created her "Countess of Battenberg" with the style "Illustrious Highness" (H. Ill.H.) in 1851, at her morganatic marriage to Grand Duke Louis' brother Prince Alexander of Hesse and by Rhine, and elevated her title to "Princess of Battenberg" with the style "Serene Highness" (HSH) in 1858.  The name "Battenberg" was last used by her youngest son, Prince Francis Joseph of Battenberg, who died childless in 1924.  Most members of the family, residing in the United Kingdom, had renounced their German titles in 1917, due to rising anti-German sentiment among the British public during World War I, and changed their name to "Mountbatten", an anglicised version of Battenberg.  The name Battenberg refers to the town Battenberg, Hesse. Prince Ludwig of Hesse and by Rhine (Ludwig Ernst Andreas Prinz und Landgräf von Hessen), (25 October 1931 – 16 November 1937), was the eldest son of Georg Donatus, Hereditary Grand Duke of Hesse and Princess Cecilie of Greece and Denmark, an older sister of Prince Philip, Duke of Edinburgh.  He was the first great-great-great-grandchild of Queen Victoria. Princess Victoria of Hesse and by Rhine, later Victoria Mountbatten, Marchioness of Milford Haven (Victoria Alberta Elisabeth Mathilde Marie; 5 April 1863 – 24 September 1950) was the eldest daughter of Louis IV, Grand Duke of Hesse and by Rhine (1837–1892), and his first wife Princess Alice of the United Kingdom (1843–1878), daughter of Queen Victoria and Prince Albert of Saxe-Coburg and Gotha. Prince Friedrich of Hesse and by Rhine (Friedrich Wilhelm August Victor Leopold Ludwig; 7 October 1870 – 29 May 1873) was the haemophiliac second son of Louis IV, Grand Duke of Hesse, and Princess Alice of the United Kingdom, one of the daughters of Queen Victoria.  He was also a maternal great-uncle of Prince Philip, Duke of Edinburgh through his eldest sister Princess Victoria of Hesse and by Rhine.
Answer: 1911