On 18 Feb 1843 [his father] George V King Hanover 1819-1878 (age 23) and [his mother] were married. He the son of Ernest Augustus King Hanover (age 71) and Frederica Mecklenburg Strelitz Queen Consort Hanover 1778-1841. He a grandson of King George III of Great Britain and Ireland. 
On 21 Sep 1845 Ernest Augustus Hanover 3rd Duke Cumberland and Teviotdale was born to George V King Hanover 1819-1878 (age 26) and . He a great grandson of King George III of Great Britain and Ireland.
On 18 Nov 1851 [his grandfather] Ernest Augustus King Hanover (age 80) died. His son [his father] George V King Hanover 1819-1878 (age 32) succeeded V King Hanover, 2nd Duke Cumberland and Teviotdale. [his mother] by marriage Queen Consort Hanover.
On 09 Nov 1866 Tsar Alexander III of Russia (age 21) and [his future sister-in-law] Dagmar aka Maria Feodrovna Glücksburg (age 18) were married. She the daughter of King Christian IX of Denmark 1818-1906 (age 48) and Queen Louise Hesse-Kassel of Denmark 1817-1898 (age 49). He a great x 5 grandson of King George I of Great Britain and Ireland. She a great x 3 granddaughter of King George II of Great Britain and Ireland. 
In 1878 Ernest Augustus Hanover 3rd Duke Cumberland and Teviotdale (age 32) was appointed 769th Knight of the Garter by Queen Victoria of the United Kingdom (age 58).
On 12 Jun 1878 [his father] George V King Hanover 1819-1878 (age 59) died. His son Ernest Augustus Hanover 3rd Duke Cumberland and Teviotdale (age 32) succeeded 3rd Duke Cumberland and Teviotdale.
On 22 Dec 1878 Ernest Augustus Hanover 3rd Duke Cumberland and Teviotdale (age 33) and Thyra Glücksburg Duchess Cumberland and Teviotdale 1853-1933 (age 25) were married. She by marriage Duchess Cumberland and Teviotdale. She the daughter of King Christian IX of Denmark 1818-1906 (age 60) and Queen Louise Hesse-Kassel of Denmark 1817-1898 (age 61). He the son of George V King Hanover 1819-1878 and . They were fourth cousins. He a great grandson of King George III of Great Britain and Ireland. She a great x 3 granddaughter of King George II of Great Britain and Ireland.
On 11 Oct 1879 [his daughter] Marie Louise Hanover was born to Ernest Augustus Hanover 3rd Duke Cumberland and Teviotdale (age 34) and [his wife] Thyra Glücksburg Duchess Cumberland and Teviotdale 1853-1933 (age 26). She a great x 2 granddaughter of King George III of Great Britain and Ireland.
On 28 Oct 1880 [his son] George William Hanover was born to Ernest Augustus Hanover 3rd Duke Cumberland and Teviotdale (age 35) and [his wife] Thyra Glücksburg Duchess Cumberland and Teviotdale 1853-1933 (age 27). He a great x 2 grandson of King George III of Great Britain and Ireland.
On 29 Sep 1882 [his daughter] Alexandra Hanover was born to Ernest Augustus Hanover 3rd Duke Cumberland and Teviotdale (age 37) and [his wife] Thyra Glücksburg Duchess Cumberland and Teviotdale 1853-1933 (age 29). She a great x 2 granddaughter of King George III of Great Britain and Ireland.
On 11 Jul 1884 [his daughter] Olga Hanover was born to Ernest Augustus Hanover 3rd Duke Cumberland and Teviotdale (age 38) and [his wife] Thyra Glücksburg Duchess Cumberland and Teviotdale 1853-1933 (age 30). She a great x 2 granddaughter of King George III of Great Britain and Ireland.
On 04 Jul 1885 [his son] Christian Hanover was born to Ernest Augustus Hanover 3rd Duke Cumberland and Teviotdale (age 39) and [his wife] Thyra Glücksburg Duchess Cumberland and Teviotdale 1853-1933 (age 31). He a great x 2 grandson of King George III of Great Britain and Ireland.
On 20 Oct 1885 [his brother-in-law] Prince Valdemar Glücksburg (age 26) and Princess Marie Orléans (age 20) were married in a civil ceremony at Château d'Eu [Map]. He the son of King Christian IX of Denmark 1818-1906 (age 67) and Queen Louise Hesse-Kassel of Denmark 1817-1898 (age 68). He a great x 3 grandson of King George II of Great Britain and Ireland.
On 17 Nov 1887 [his son] Ernest Augustus Hanover Duke Brunswick 1887-1953 was born to Ernest Augustus Hanover 3rd Duke Cumberland and Teviotdale (age 42) and [his wife] Thyra Glücksburg Duchess Cumberland and Teviotdale 1853-1933 (age 34) at Penzing. He a great x 2 grandson of King George III of Great Britain and Ireland.
On 03 Sep 1901 [his son] Christian Hanover (age 16) died.
On 20 May 1912 [his son] George William Hanover (age 31) died in a car accident. Somewhat ironically he was driving to the funeral of his maternal uncle [his brother-in-law] Frederick VIII King Denmark 1843-1912 (deceased) when he skidded on a newly laid road surface. He and his valet Karl Grebe were killed in the accident. There is a monument at the site.
From the web:
Probably overtired, the car raced into loose gravel rock at 90 kilometers per hour, came off the road to the right, knocked down three trees and drilled into the earth with a destroyed front axle. Prince Georg Wilhelm and his valet Grebe – Karl Grebe – died instantly. The chauffeur sitting in the back survived slightly injured. The dead were laid out in the church of Nackel and brought a little later with military honors to Friesack station.
At the station, the coffins were loaded into the carriage to the songs of the Friesacker men's choir, which brought the crown prince to the funeral in Gmunden, Austria. The Friesacker stationmaster, Joachim Gahl, it is said, received a letter from Austria including two cufflinks decorated with diamonds and the initials "GW" thanks to his duty. Hanover's royal family thanked the villagers because they had shown themselves so compassionate. Monetary donations were made to the church, the warrior federation and the virgin association. In the church, a plaque commemorates the laying out and that the congregation sang before the transfer of the dead.
On 24 May 1913 [his son] Ernest Augustus Hanover Duke Brunswick 1887-1953 (age 25) and [his daughter-in-law] Viktoria Luise Hohenzollern Duchess Brunswick 1892-1980 (age 20) were married. She the daughter of Wilhelm Hohenzollern (age 54) and Empress Auguste Viktoria Oldenburg (age 54). He the son of Ernest Augustus Hanover 3rd Duke Cumberland and Teviotdale 1845-1923 (age 67) and Thyra Glücksburg Duchess Cumberland and Teviotdale 1853-1933 (age 59). They were third cousin once removed. He a great x 2 grandson of King George III of Great Britain and Ireland. She a great granddaughter of Queen Victoria of the United Kingdom.
On 14 Nov 1923 Ernest Augustus Hanover 3rd Duke Cumberland and Teviotdale (age 78) died. Duke Cumberland and Teviotdale extinct.
On 26 Feb 1933 [his former wife] Thyra Glücksburg Duchess Cumberland and Teviotdale 1853-1933 (age 79) died.
Paternal Family Tree: Hanover
Kings Wessex: Great x 23 Grand Son of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 21 Grand Son of Owain "Great" King Gwynedd 1100-1170
Kings Seisyllwg: Great x 27 Grand Son of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 22 Grand Son of Maredudd ap Bleddyn King Powys 1047-1132
Kings England: Great Grand Son of King George III of Great Britain and Ireland
Kings Scotland: Great x 17 Grand Son of Robert "The Bruce" I King Scotland
Kings Franks: Great x 19 Grand Son of Louis VII King Franks
Kings France: Great x 14 Grand Son of Charles "Beloved Mad" VI King France
Great x 4 Grandfather: King George I of Great Britain and Ireland Great Grand Son of King James I of England and Ireland and VI of Scotland
Great x 3 Grandfather: King George II of Great Britain and Ireland Son of King George I of Great Britain and Ireland
Great x 4 Grandmother: Sophia Dorothea Hanover Queen Consort England 1666-1726
14 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandfather: Frederick Louis Hanover Prince of Wales Son of King George II of Great Britain and Ireland
Great x 4 Grandfather: John Frederick Hohenzollern 14 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandmother: Caroline Hohenzollern Queen Consort England 15 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 1 Grandfather: King George III of Great Britain and Ireland Grand Son of King George II of Great Britain and Ireland
Great x 4 Grandfather: Frederick Saxe Coburg Altenburg I Duke Saxe Gotha Altenburg 1646-1691 10 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Frederick Saxe Coburg Altenburg II Duke Saxe Gotha Altenburg 1676-1732 11 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Duchess Magdalena Sibylle of Saxe Gotha Altenburg 1648-1681 14 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandmother: Augusta Saxe Coburg Altenburg 12 x Great Grand Daughter of King Edward III of England
GrandFather: Ernest Augustus King Hanover Son of King George III of Great Britain and Ireland
Great x 4 Grandfather: Duke Adolphus Frederick I of Mecklenburg-Schwerin 12 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Duke Adolphus Frederick II of Mecklenburg-Strelitz 13 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Maria Katharina 13 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandfather: Charles Louis Frederick Duke of Mecklenburg 14 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 1 Grandmother: Charlotte Mecklenburg Strelitz Queen Consort England 15 x Great Grand Daughter of King Henry "Curtmantle" II of England
Father: George V King Hanover 1819-1878 Grand Son of King George III of Great Britain and Ireland
Great x 4 Grandfather: Duke Adolphus Frederick I of Mecklenburg-Schwerin 12 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Duke Adolphus Frederick II of Mecklenburg-Strelitz 13 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Maria Katharina 13 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandfather: Charles Louis Frederick Duke of Mecklenburg 14 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 1 Grandfather: Grand Duke Charles II of Mecklenburg Strelitz 15 x Great Grand Son of King Henry "Curtmantle" II of England
GrandMother: Frederica Mecklenburg Strelitz Queen Consort Hanover 1778-1841 16 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Landgrave Ernest Louis of Hesse-Darmstadt 14 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Landgrave Louis VIII of Hesse-Darmstadt 15 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 2 Grandfather: Prince George William of Hesse-Darmstadt 16 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 1 Grandmother: Princess Friederike of Hesse-Darmstadt 17 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandmother: Countess Maria Louise Albertine of Leiningen-Dagsburg-Falkenburg
Ernest Augustus Hanover 3rd Duke Cumberland and Teviotdale 1845-1923 Great Grand Son of King George III of Great Britain and Ireland
