Information: - Princess Thyra of Denmark , Danish pronunciation : ( ty ) , ( 29 September 1853 -- Gmunden , 26 February 1933 ) was the youngest daughter of Christian IX of Denmark and Louise of Hesse - Kassel . In 1878 she married Ernest Augustus , the exiled heir to the Kingdom of Hanover . As the Kingdom of Hanover had been annexed by Prussia in 1866 , she spent most of her life in exile with her husband in Austria . Thyra was the sister of Frederik VIII of Denmark , Queen Alexandra of the United Kingdom , George I of Greece and Empress Maria Feodorovna of Russia . - The House of Welf (also Guelf or Guelph) was a European dynasty that has included many German and British monarchs from the 11th to 20th century and Emperor Ivan VI of Russia in the 18th century. - The House of Hanover (or the Hanoverians ) is a German royal dynasty that ruled the Electorate and then the Kingdom of Hanover, and that also provided monarchs of Great Britain and Ireland from 1714 and ruled the United Kingdom until the death of Queen Victoria in 1901. Upon Victoria's death, the British throne passed to her eldest son Edward VII, a member of the House of Saxe-Coburg and Gotha through his father. The House of Hanover was formally named the House of Brunswick-Luneburg, Hanover line, as it was originally a cadet branch of the House of Brunswick-Luneburg. The senior branch became extinct in 1884, and the House of Hanover is now the only surviving branch of the House of Welf, which is the senior branch of the House of Este. The current head of the House of Hanover is Ernst August, Prince of Hanover. - The Kingdom of Hanover was established in October 1814 by the Congress of Vienna, with the restoration of George III to his Hanoverian territories after the Napoleonic era. It succeeded the former Electorate of Brunswick-Luneburg (known informally as the Electorate of Hanover), and joined with 38 other sovereign states in the German Confederation in June 1815. The kingdom was ruled by the House of Hanover, a younger branch of the House of Welf, in personal union with Great Britain and Ireland until 1837, before being conquered by Prussia in 1866 and transformed into a Prussian province. Along with the rest of Prussia, Hanover became part of the German Empire upon unification in January 1871. Briefly revived as the State of Hanover in 1946, the state was subsequently merged with some smaller states to form the current state of Lower Saxony in West Germany, later Germany. Given the information, choose the subject and object entities that have the relation of 'noble family'.
The answer to this question is:
princess thyra of denmark , house of hanover