Notes:

https://www.findagrave.com/memorial/28361365/adolphus_frederick_of_hanover

British Royalty. Born Adolphus Frederick Hanover at Buckingham Palace, London, the seventh son of George III, King of Great Britain and Sophie Charlotte Herzogin von Meckleburg-Sterlitz. He was educated at Kew and the University of Göttingen, Germany. He was invested as a Knight, Order of the Garter in June 1786 and gained the rank of Colonel in 1793 in the service of the Hanoverian Army. He was promoted to Lieutenant-General in 1798. He was created 1st Duke of Cambridge, 1st Baron of Culloden, and 1st Earl of Tipperary in November 1801. He was invested as a Privy Counselor in February 1802, and gained the rank of Lieutenant-General in June 1803 in the service of the British Army. He was invested as a Knight Grand Cross, Order of the Bath in January 1815, and as a Knight Grand Cross, Hanoverian Order in August 1815. After the death of his niece, the heir apparent, Princess Charlotte, in 1817, he and his unmarried brothers scrambled for legitimate brides in the hope of securing heirs to the throne. He married Auguste Wilhelmine Luise Prinzessin von Hessen-Kassel, in May 1818 at Cassel, Germany and with her had three children who stood behind their cousin, Victoria, in precedence. He was invested as a Knight Grand Cross, Order of St. Michael and St. George in June 1825. He died at his residence, Cambridge House, in London at age 76, his only son succeeded to his titles.

Adolphus Frederick Hanover, 1st Duke of Cambridge was born on 24 February 1774 at Buckingham Palace, St. James's, London, EnglandG.3 He was the son of George III Hanover, King of Great Britain and Sophie Charlotte Herzogin von Mecklenburg-Strelitz.4 He married Auguste Wilhelmine Luise Prinzessin von Hessen-Kassel, daughter of Friedrich III Prinz General von Hessen-Kassel and Karoline Polyxena Prinzessin von Nassau-Usingen, on 7 May 1818 at Cassel, GermanyG.3 Adolphus Frederick and Auguste Wilhelmine Luise were also married in a religious ceremony on 1 June 1818 at Kew Palace, Kew, London, EnglandG. He died on 8 July 1850 at age 76 at Cambridge House, Piccadilly, London, EnglandG, from a gastric fever.5 He was buried on 17 July 1850 at Kew Palace, Kew, London, EnglandG.5 His will was proven (by probate) in August 1850.5
He was a member of the House of Guelph.6 He gained the title of HRH Prince Adolphus Frederick of the United Kingdom. He was educated at Kew, London, EnglandG.4 He was appointed Knight, Order of the Garter (K.G.) on 2 June 1786.3 He gained the rank of Colonel in 1793 in the Hanoverian Army.4 He was educated at University of Göttingen, Göttingen, GermanyG.4 He gained the rank of Lieutenant-General in 1798.4 He was created 1st Earl of Tipperary, in Ireland [U.K.] on 27 November 1801.4 He was created 1st Duke of Cambridge [U.K.] on 27 November 1801.4 He was created 1st Baron of Culloden, in North Britain [U.K.] on 27 November 1801.4 He was appointed Privy Counsellor (P.C.) on 3 February 1802.5 He gained the rank of Lieutenant-General in June 1803 in the British Army.4 He was Colonel of the Coldstream Guards between 1805 and 1850.4 He gained the rank of General in April 1808.4 He held the office of Chancellor of St. Andrews University between 1811 and 1814.5 He gained the rank of Field Marshal in November 1813.4 He was appointed Knight Grand Cross, Order of the Bath (G.C.B.) on 2 January 1815.5 He was appointed Knight Grand Cross, Hanoverian Order (G.C.H.) on 12 August 1815.5 He held the office of Viceroy of Hanover between November 1816 and June 1837.5 He held the office of Grand Master of the Order of St. Michael and St. George on 20 June 1825.5 He was appointed Knight Grand Cross, Order of St. Michael and St. George (G.C.M.G.) on 20 June 1825.5 He was Colonel of the 60th Foot between 1827 and 1850.4 He held the office of Ranger of Richmond Park between 1835 and 1850.5 He was appointed Knight, Order of the Black Eagle of Prussia.5 He was awarded the honorary degree of Doctor of Law (LL.D.) by Cambridge University, Cambridge, Cambridgeshire, EnglandG, on 4 July 1842.5 He held the office of Ranger of St. James's Park and Hyde Park between 1843 and 1850.5 He was appointed Knight, Order of St. Andrew of Russia in 1844.5 He held the office of Warden of the New Forest between 1845 and 1850.5 He has an extensive biographical entry in the Dictionary of National Biography.7

Children of Adolphus Frederick Hanover, 1st Duke of Cambridge and Auguste Wilhelmine Luise Prinzessin von Hessen-Kassel
Field Marshal George William Frederick Charles Hanover, 2nd Duke of Cambridge+ b. 26 Mar 1819, d. 17 Mar 1904
Auguste Karoline Hanover, Princess of Cambridge+6 b. 19 Jul 1822, d. 4 Dec 1916
Mary Adelaide Wilhelmina Elizabeth Hanover, Princess of Cambridge+8 b. 27 Nov 1833, d. 27 Oct 1897
Citations
[S3] Marlene A. Eilers, Queen Victoria's Descendants (Baltimore, Maryland: Genealogical Publishing Co., 1987), page 178. Hereinafter cited as Queen Victoria's Descendants.


http://www.unofficialroyalty.com/july-8-daily-featured-royal-date/

Adolphus married Auguste Wilhelmine Luise von Hessen-Kassel 7 May 1818, Kassel, Hessen, Germany. Auguste (daughter of Friedrich Hessen-Kassel, III and Karoline Polyxene von Nassau-Usingen) was born 25 Jul 1797, Rumpenheim, Offenbach am Main, Hessen, Germany; was christened 31 Jul 1797, Rumpenheim, Offenbach am Main, Hessen, Germany; died 6 Apr 1889, Saint James's Palace, London, England, United Kingdom; was buried , St. George's Chapel Windsor, Windsor and Maidenhead Royal Borough, Berkshire, England. [Group Sheet]

1. Mary Adelaide Wilhelmina Elizabeth of Cambridge was born 27 Nov 1833, Hanover, Prussia, Germany; died 27 Oct 1897, White Lodge, Richmond Park, London, England; was buried 3 Nov 1897, St.George Chapel Cemetery Windsor, Berkshire, England.