Question: Princess Sophie of Bavaria's eldest son died in which year ?

Context articles: Prince Georg of Hanover
Prince Welf Ernst of Hanover
Duchess Amalie in Bavaria
Antrobus baronets
Princess Sophie of Bavaria
Emperor Huizong of Song
Franz Joseph I of Austria
Bunbury baronets
Prince Joseph Wenzel of Liechtenstein
Viscount Ullswater

Prince Georg of Hanover ("Georg Paul Christian Prinz von Hannover"), Duke of Brunswick-Lüneburg (born 9 December 1949 at Schloss Salem in Salem, Baden-Württemberg, Germany).
 Georg is the second eldest son of Prince George William of Hanover and his wife Princess Sophie of Greece and Denmark, an elder sister of Prince Philip, Duke of Edinburgh.
 Georg is a male-line descendant of George III of the United Kingdom and Charlotte of Mecklenburg-Strelitz and a descendant of Albert, Prince Consort and Victoria of the United Kingdom through their daughters Victoria, Princess Royal and Princess Alice of the United Kingdom.
 He is a first cousin of Charles, Prince of Wales and nephew of Prince Philip, Duke of Edinburgh and Elizabeth II of the United Kingdom.
Prince Welf Ernst of Hanover (Welf Ernst August Andreas Philipp Georg Wilhelm Ludwig Berthold Prinz von Hannover), Duke of Brunswick-Lüneburg (25 January 1947 – 10 January 1981) was the eldest son of Prince George William of Hanover and his wife Princess Sophie of Greece and Denmark, sister of Prince Philip, Duke of Edinburgh.
 Welf was a first cousin of Charles, Prince of Wales.
 The prince used the name Welf Prinz von Hannover.
Duchess "Amalie" Maria in Bavaria (Full German name: "Amalie Maria, Herzogin in Bayern") (24 December 1865 – 26 May 1912) was born in Munich, Kingdom of Bavaria, the only child of Duke Karl-Theodor in Bavaria and his first wife Princess Sophie of Saxony.
 Amalie was a member of the House of Wittelsbach and a Duchess in Bavaria by birth.
 She was a member of the House of Württemberg, Duchess of Urach and Countess of Württemberg through her marriage to Wilhelm, 2nd Duke of Urach.
 She was called by the French version of her name, Amélie, and was lifelong friends with her cousin, Archduchess Marie Valerie of Austria.
The Antrobus Baronetcy, of Antrobus in the County Palatine of Chester, is a title in the Baronetage of the United Kingdom.
 It was created on 22 May 1815 for Edmund Antrobus, of Antrobus Hall, Antrobus, Cheshire, a Fellow of the Royal Society, with remainder to his nephews Edmund Antrobus and Gibbs Antrobus.
 He died unmarried in 1826 and was succeeded according to the special remainder by his nephew Edmund, the second Baronet.
 He and his brother Gibbs were the sons of John Antrobus, brother of the first Baronet.
 The second Baronet was succeeded by his eldest son, the third Baronet.
 He sat as Member of Parliament for Surrey East and Wilton.
 His eldest son, the fourth Baronet, was a Colonel in the Coldstream Guards.
 He died without surviving male issue and was succeeded by his younger brother, the fifth Baronet.
 Most of the Amesbury Abbey estate in Wiltshire was sold the same year.
 The fifth Baronet died unmarried and was succeeded by his first cousin, the sixth Baronet.
 He was the son of Robert Crawfurd Antrobus, younger son of the second Baronet.
 He was childless and on his death in 1968 the line of the second Baronet failed.
 He was succeeded by his second cousin once removed, the seventh Baronet.
 He was the eldest son of Edward Geoffrey Antrobus, second son of John Coutts Antrobus, son of the aforementioned Gibbs Antrobus, younger brother of the second Baronet.
 As of 2008 the title is held by the seventh Baronet's eldest son, the eighth Baronet, who succeeded in 1995.
 He lives in Johannesburg, South Africa.
Princess Sophie of Bavaria (Sophie Friederike Dorothea Wilhelmine; 27 January 1805 – 28 May 1872) was born to King Maximilian I Joseph of Bavaria and his second wife Caroline of Baden.
 She was the identical twin sister of Princess Maria Anna of Bavaria, Queen of Saxony as wife of Frederick Augustus II of Saxony.
 Her eldest son Franz Joseph reigned as Emperor of Austria, and King of Hungary; her second son Maximilian reigned as Emperor of Mexico.
Emperor Huizong of Song (7 June 1082 – 4 June 1135), personal name Zhao Ji, was the eighth emperor of the Song dynasty in China.
 He is also a very well-known calligrapher.
 Born as the 11th son of Emperor Shenzong, he ascended the throne in 1100 upon the death of his elder brother and predecessor, Emperor Zhezong, because Emperor Zhezong's only son died prematurely.
 He lived in luxury, sophistication and art in the first half of his life.
 In 1126, when the Jurchen-led Jin dynasty invaded the Song dynasty during the Jin–Song Wars, Emperor Huizong abdicated and passed on his throne to his eldest son, Emperor Qinzong, while he assumed the honorary title of "Taishang Huang" (or "Retired Emperor").
 The following year, the Song capital, Bianjing, was conquered by Jin forces in an event historically known as the Jingkang Incident.
 Emperor Huizong, along with Emperor Qinzong and the rest of their family, were taken captive by the Jurchens and brought back to the Jin capital, Huining Prefecture in 1128.
 The Jurchen ruler, Emperor Taizong, gave the former Emperor Huizong a title, Duke Hunde (literally "Besotted Duke"), to humiliate him.
 Emperor Huizong died in Wuguocheng after spending about nine years in captivity.
Franz Joseph I or Francis Joseph I (German: "Franz Josef I." , Hungarian: "I. Ferenc József" , , Romanian: "Francisc Iosif" , Slovene: "Franc Jožef I." , Italian: "Francesco Giuseppe" , Croatian: "Franjo Josip I." ) (18 August 1830 – 21 November 1916) was Emperor of Austria and King of Hungary, King of Bohemia and many others (see grand title of the Emperor of Austria) from 2 December 1848 until his death on 21 November 1916.
 From 1 May 1850 to 24 August 1866 he was also President of the German Confederation.
 He was the longest-reigning Emperor of Austria and King of Hungary, as well as the third longest-reigning monarch of any country in European history, after Louis XIV of France and Johann II of Liechtenstein.
The Bunbury Baronetcy, of Bunbury, Oxon and Stanney Hall in the County of Chester, is a title in the Baronetage of England.
 It was created on 29 June 1681 for Thomas Bunbury, Sheriff of Cheshire from 1673 to 1674 and the member of an ancient Cheshire family.
 His grandson, Henry, the third Baronet, and great-grandson, the fourth Baronet, both sat as Members of Parliament for Chester.
 The latter died unmarried at an early age and was succeeded by his younger brother, the fifth Baronet.
 He was a clergyman.
 On his death in 1764 the title passed to his eldest son, the sixth Baronet.
 He represented Suffolk in the House of Commons for over forty years but is best remembered for his marriage to Lady Sarah Lennox.
 He died childless in 1821 and was succeeded by his nephew, the seventh Baronet.
 He was the son of Henry Bunbury, younger son of the fifth Baronet.
 The seventh Baronet was a distinguished soldier and politician.
 His eldest son, the eighth Baronet, was High Sheriff of Suffolk in 1868.
 He died childless in 1886 and was succeeded by his younger brother, the ninth Baronet.
 He was Liberal Member of Parliament for Bury St Edmunds.
 He died unmarried in 1895 and was succeeded by his nephew, the tenth Baronet.
 He was the son of Colonel Henry William St Pierre Bunbury, third son of the seventh Baronet.
 He served as High Sheriff of Suffolk in 1908 and was a Deputy Lieutenant of the county.
 On his death in 1930 the title passed to his son, the eleventh Baronet.
 He was High Sheriff of Suffolk in 1936 and was a Deputy Lieutenant of the county.
 His son, the twelfth Baronet, was High Sheriff of Suffolk in 1972.
 As of 2014 the title is held by the latter's second but eldest surviving son, the thirteenth Baronet, who succeeded in 1985.
Prince Joseph Wenzel of Liechtenstein, Count Rietberg (German: "Joseph Wenzel Maximilian Maria von und zu Liechtenstein" ; born 24 May 1995) is the eldest child of Prince Alois of Liechtenstein, the Regent and Hereditary Prince of Liechtenstein, and his wife Princess Sophie of Bavaria, Duchess in Bavaria, he is also the eldest grandchild of the current ruling prince of Liechtenstein.
Viscount Ullswater, of Campsea Ashe in the County of Suffolk, is a title in the Peerage of the United Kingdom.
 It was created in 1921 for James Lowther upon his retirement as Speaker of the House of Commons.
 He was the eldest son of the Hon. William Lowther, third son of the Hon. Henry Lowther, second son of William Lowther, 1st Earl of Lonsdale (see Earl of Lonsdale and Lowther Baronets for earlier history of the family).
 The first Viscount lived to the age of 93, and was pre-deceased by both his eldest son the Hon. Christopher Lowther, a Conservative politician, and his eldest son's eldest son John Arthur Lowther (1910–1942) (who was Private Secretary to Prince George, Duke of Kent and was killed in the same air crash as him), the title being inherited by his seven-year-old great-grandson, the second and current Viscount, in an extremely rare instance of a great-grandson succeeding his great-grandfather in a peerage.
 The second Viscount held office in the Conservative administrations of Margaret Thatcher and John Major and since 2003 he is one of the ninety elected hereditary peers that remain in the House of Lords after the passing of the House of Lords Act 1999.
 As a descendant of the first Earl of Lonsdale he is also in remainder to this peerage and its subsidiary titles.
 The current holder of the earldom, Hugh Lowther, 8th Earl of Lonsdale, is Lord Ullswater's fourth cousin.