On 10 Nov 810 [his future brother-in-law] William Hesse-Kassel and Princess Charlotte of Denmark were married. He a great grandson of King George II of Great Britain and Ireland. 
On 25 Oct 1760 King George II of Great Britain and Ireland (age 76) died at Kensington Palace. His grandson [his father] King George III of Great Britain and Ireland (age 22) succeeded III King Great Britain and Ireland. Duke Cambridge merged with the Crown.
On 08 Sep 1761 [his father] King George III of Great Britain and Ireland (age 23) and [his mother] Charlotte Mecklenburg Strelitz Queen Consort England (age 17) were married at Chapel Royal, St James's Palace. She by marriage Queen Consort England. He the son of Frederick Louis Hanover Prince of Wales and Augusta Saxe Coburg Altenburg (age 41). They were half second cousin twice removed. He a grandson of King George II of Great Britain and Ireland.
On 24 Feb 1774 Adolphus Hanover 1st Duke Cambridge was born to King George III of Great Britain and Ireland (age 35) and Charlotte Mecklenburg Strelitz Queen Consort England (age 29).
In 1786 [his father] King George III of Great Britain and Ireland (age 47) created new Garter Knights as follows:
601st [his brother] Edward Augustus Hanover 1st Duke Kent and Strathearn (age 18),
602nd [his brother] Ernest Augustus King Hanover (age 14),
603rd [his brother] Prince Augustus Frederick Hanover 1st Duke Sussex (age 12),
604th Adolphus Hanover 1st Duke Cambridge (age 11),
605th William Elector of Hesse (age 42),
606th Henry Somerset 5th Duke Beaufort (age 41),
607th George Nugent Temple Grenville 1st Marquess Buckingham (age 32),
608th Charles Cornwallis 1st Marquess Cornwallis (age 47).
In 1801 Adolphus Hanover 1st Duke Cambridge (age 26) was created 1st Duke Cambridge.
On 01 Jun 1818 Adolphus Hanover 1st Duke Cambridge (age 44) and Princess Augusta Hesse-Kassel Duchess Cambridge (age 20) were married. She by marriage Duchess Cambridge. The difference in their ages was 23 years. He the son of King George III of Great Britain and Ireland (age 79) and Charlotte Mecklenburg Strelitz Queen Consort England (age 74). They were second cousins. She a great granddaughter of King George II of Great Britain and Ireland.
On 17 Nov 1818 [his mother] Charlotte Mecklenburg Strelitz Queen Consort England (age 74) died.
On 26 Mar 1819 [his son] Prince George Hanover 2nd Duke Cambridge was born to Adolphus Hanover 1st Duke Cambridge (age 45) and [his wife] Princess Augusta Hesse-Kassel Duchess Cambridge (age 21) at Cambridge House, Hanover, Lower Saxony. He a grandson of King George III of Great Britain and Ireland. Coefficient of inbreeding 1.64%.
On 29 Jan 1820 [his father] King George III of Great Britain and Ireland (age 81) died at Windsor Castle [Map]. His reign the third longest after Victoria and Elizabeth II. His son [his brother] King George IV of Great Britain and Ireland (age 57) succeeded IV King Great Britain and Ireland. Caroline of Brunswick Queen Consort England (age 51) by marriage Queen Consort England.
On 27 Nov 1833 [his daughter] Princess Mary Adelaide Hanover was born to Adolphus Hanover 1st Duke Cambridge (age 59) and [his wife] Princess Augusta Hesse-Kassel Duchess Cambridge (age 36) at Hanover Lower Saxony. She a granddaughter of King George III of Great Britain and Ireland. Coefficient of inbreeding 1.64%.
On 08 Jan 1847 [his son] Prince George Hanover 2nd Duke Cambridge (age 27) and [his daughter-in-law] Sarah Fairbrother (age 32) were married at St John's Church, Clerkenwell [Map]. The marriage was in contravention of the 1772 Royal Marriages Act by which he was required to seek the permission of the monarch. The marriage was considered illegal. He the son of Adolphus Hanover 1st Duke Cambridge 1774-1850 (age 72) and Princess Augusta Hesse-Kassel Duchess Cambridge (age 49). He a grandson of King George III of Great Britain and Ireland.
On 08 Jul 1850 Adolphus Hanover 1st Duke Cambridge (age 76) died. His son [his son] Prince George Hanover 2nd Duke Cambridge (age 31) succeeded 2nd Duke Cambridge.
On 06 Apr 1889 [his former wife] Princess Augusta Hesse-Kassel Duchess Cambridge (age 91) died.
[his daughter] Augusta Hanover was born to Adolphus Hanover 1st Duke Cambridge and Princess Augusta Hesse-Kassel Duchess Cambridge. She a granddaughter of King George III of Great Britain and Ireland. Coefficient of inbreeding 1.64%.
Paternal Family Tree: Hanover
Kings Wessex: Great x 21 Grand Son of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 19 Grand Son of Owain "Great" King Gwynedd 1100-1170
Kings Seisyllwg: Great x 25 Grand Son of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 20 Grand Son of Maredudd ap Bleddyn King Powys 1047-1132
Kings England: Son of King George III of Great Britain and Ireland
Kings Scotland: Great x 15 Grand Son of Robert "The Bruce" I King Scotland
Kings Franks: Great x 17 Grand Son of Louis VII King Franks
Kings France: Great x 12 Grand Son of Charles "Beloved Mad" VI King France
Victoria Mary Teck Queen Consort England x 1
King Edward VIII of the United Kingdom x 1
King George VI of the United Kingdom x 1
Queen Elizabeth II of the United Kingdom x 1
King Charles III x 1
Great x 4 Grandfather: George Hanover Duke Brunswick-Lüneburg 1582-1641
Great x 3 Grandfather: Ernest Augustus Hanover Elector Brunswick-Lüneburg 1629-1698 13 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Anne Eleonore Hesse Darmstadt Duchess Brunswick-Lüneburg 1601-1659 12 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 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 4 Grandfather: Frederick Palatinate Simmern V Elector Palatine Rhine
10 x Great Grand Son of King Henry III of England
Great x 3 Grandmother: Sophia Palatinate Simmern
Grand Daughter of King James I of England and Ireland and VI of Scotland
Great x 4 Grandmother: Princess Elizabeth Stewart Queen Bohemia
Daughter of King James I of England and Ireland and VI of Scotland
Great x 1 Grandfather: King George II of Great Britain and Ireland Son of King George I of Great Britain and Ireland
Great x 4 Grandfather: George Hanover Duke Brunswick-Lüneburg 1582-1641
Great x 3 Grandfather: George Wilhelm Hanover Duke Brunswick-Lüneburg 1624-1705 13 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Anne Eleonore Hesse Darmstadt Duchess Brunswick-Lüneburg 1601-1659 12 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandmother: Sophia Dorothea Hanover Queen Consort England 1666-1726 14 x Great Grand Daughter of King Henry "Curtmantle" II of England
GrandFather: Frederick Louis Hanover Prince of Wales Son of King George II of Great Britain and Ireland
Great x 4 Grandfather: Joachim Ernst Hohenzollern 12 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Albert Hohenzollern 13 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 2 Grandfather: John Frederick Hohenzollern 14 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 1 Grandmother: Caroline Hohenzollern Queen Consort England 15 x Great Grand Daughter of King Henry "Curtmantle" II of England
Father: King George III of Great Britain and Ireland Grand Son of King George II of Great Britain and Ireland
Great x 4 Grandfather: Johann Wettin II Duke Saxe Weimar 1570-1605 12 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Ernest "The Pious" Saxe Gotha I Duke Saxe Gotha 1601-1675 13 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Dorothea Maria Anhalt
Great x 2 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 4 Grandfather: Johann Philipp Wettin Duke Saxe Altenburg 1597-1639 8 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Elisabeth Sophie Saxe Altenburg Duchess Saxe Gotha 1619-1680 9 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Elisabeth of Brunswick-Wolfenbüttel Duchess of Saxe-Altenburg 13 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 1 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 Grandfather: John George Wettin Elector Saxony 1585-1656 12 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Augustus Duke of Saxe Weissenfels 13 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 2 Grandmother: Duchess Magdalena Sibylle of Saxe Gotha Altenburg 1648-1681 14 x Great Grand Daughter of King Henry "Curtmantle" II of England
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 Grandmother: Anna Maria of Mecklenburg-Schwerin 13 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Anna Maria of Ostfriesland 12 x Great Grand Daughter of King Henry "Curtmantle" II of England
GrandMother: Augusta Saxe Coburg Altenburg 12 x Great Grand Daughter of King Edward III of England
Adolphus Hanover 1st Duke Cambridge 1774-1850 Son of King George III of Great Britain and Ireland
Great x 4 Grandfather: Duke John Albert I of Mecklenburg-Schwerin 11 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Duke John VII of Mecklenburg-Schwerin 12 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Anna Sophia Hohenzollern 11 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandfather: Duke Adolphus Frederick I of Mecklenburg-Schwerin 12 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Duke Adolph Oldenburg of Holstein-Gotorp
Great x 3 Grandmother: Sophia Oldenburg 11 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Christine Hesse 10 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 1 Grandfather: Duke Adolphus Frederick II of Mecklenburg-Strelitz 13 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Henry Duke of Brunswick-Dannenberg 11 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Julius Ernst Duke of Brunswick-Dannenberg 12 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 2 Grandmother: Maria Katharina 13 x Great Grand Daughter of King Henry "Curtmantle" II of England
GrandFather: Charles Louis Frederick Duke of Mecklenburg 14 x Great Grand Son of King Henry "Curtmantle" II of England
Mother: Charlotte Mecklenburg Strelitz Queen Consort England 15 x Great Grand Daughter of King Henry "Curtmantle" II of England