Biography of William Elector of Hesse 1743-1821
Paternal Family Tree: Hesse
Maternal Family Tree: Caroline Hohenzollern Queen Consort England 1683-1737
On 08 May 1740 [his father] Frederick Hesse-Kassel (age 19) and [his mother] Mary Hanover (age 17) were married. She the daughter of [his grandfather] King George II (age 56). She the daughter of King George II of Great Britain and Ireland (age 56) and Caroline Hohenzollern Queen Consort England. He the son of William Hesse-Kassel (age 58). They were fourth cousins.
On 03 Jun 1743 William Elector of Hesse was born to Frederick Hesse-Kassel (age 22) and Mary Hanover (age 20). He a grandson of King George II of Great Britain and Ireland.
On 01 Feb 1760 [his grandfather] William Hesse-Kassel (age 77) died. His son [his father] Frederick Hesse-Kassel (age 39) succeeded II Landgrave Hesse Kassel. [his mother] Mary Hanover (age 36) by marriage Landgravine Hesse Kassel.
On 01 Sep 1764 William Elector of Hesse (age 21) and Electress Wilhelmina Caroline Oldenburg (age 17) were married at Christiansborg Castle. She the daughter of Frederick V King Denmark and Norway (age 41) and Louise Hanover Queen Consort Denmark and Norway. He the son of Frederick Hesse-Kassel (age 44) and Mary Hanover (age 41). They were first cousins. He a grandson of King George II of Great Britain and Ireland. She a granddaughter of King George II of Great Britain and Ireland. 
On 30 Aug 1766 [his brother] Charles Hesse-Kassel (age 21) and [his sister-in-law] Louise Oldenburg (age 16) were married at Christiansborg Castle. She the daughter of Frederick V King Denmark and Norway and Louise Hanover Queen Consort Denmark and Norway. He the son of Frederick Hesse-Kassel (age 46) and Mary Hanover (age 43). They were first cousins. He a grandson of King George II of Great Britain and Ireland. She a granddaughter of King George II of Great Britain and Ireland.
On 14 Sep 1768 [his daughter] Marie Friederike Hesse-Kassel was born to William Elector of Hesse (age 25) and [his wife] Electress Wilhelmina Caroline Oldenburg (age 21). She a great granddaughter of King George II of Great Britain and Ireland. Coefficient of inbreeding 6.89%.
On 11 Jul 1771 [his daughter] Karoline Amalie Hesse-Kassel Duchess Saxe Gotha Altenburg was born to William Elector of Hesse (age 28) and [his wife] Electress Wilhelmina Caroline Oldenburg (age 24). She a great granddaughter of King George II of Great Britain and Ireland. Coefficient of inbreeding 6.89%.
On 14 Jan 1772 [his mother] Mary Hanover (age 48) died.
On 08 Aug 1772 [his son] Friedrich Hesse-Kassel was born to William Elector of Hesse (age 29) and [his wife] Electress Wilhelmina Caroline Oldenburg (age 25). He a great grandson of King George II of Great Britain and Ireland. Coefficient of inbreeding 6.89%.
On 10 Jan 1773 [his father] Frederick Hesse-Kassel (age 52) and [his step-mother] Princess Philippine Hohenzollern (age 27) were married. No issue. The difference in their ages was 25 years. He the son of William Hesse-Kassel. They were third cousins. She a great granddaughter of King George I of Great Britain and Ireland.
On 21 Oct 1774 [his brother-in-law] Prince Frederick Oldenburg (age 21) and Duchess Sophia Frederica of Mecklenburg-Schwerin (age 16) were married. He the son of Frederick V King Denmark and Norway and Juliana Maria Welf Queen Consort Denmark and Norway (age 45).
On 28 Jul 1777 [his son] Wilhelm Hesse-Kassel was born to William Elector of Hesse (age 34) and [his wife] Electress Wilhelmina Caroline Oldenburg (age 30). He a great grandson of King George II of Great Britain and Ireland. Coefficient of inbreeding 6.89%.
On 20 Jul 1784 [his son] Friedrich Hesse-Kassel (age 11) died.
On 31 Oct 1785 [his father] Frederick Hesse-Kassel (age 65) died. His son William Elector of Hesse (age 42) succeeded IX Landgrave Hesse Kassel. [his wife] Electress Wilhelmina Caroline Oldenburg (age 38) by marriage Landgravine Hesse Kassel.
In 1786 King George III of Great Britain and Ireland (age 47) created new Garter Knights as follows:
601st Edward Augustus Hanover 1st Duke Kent and Strathearn (age 18),
602nd Ernest Augustus King Hanover (age 14),
603rd 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 1788 William Elector of Hesse (age 44) abducted Caroline Countess of Schlotheim (age 22) and made her his mistress.
1791. Wilhelm Bottner (age 38). Portrait of William Elector of Hesse (age 47) and his family including his wife [his wife] Electress Wilhelmina Caroline Oldenburg (age 43) and their children [his son] Wilhelm Hesse-Kassel (age 13), [his daughter] Marie Friederike Hesse-Kassel (age 22) and [his daughter] Karoline Amalie Hesse-Kassel Duchess Saxe Gotha Altenburg (age 19).
Wilhelm Hesse-Kassel:
On 28 Jul 1777 he was born to William Elector of Hesse and Electress Wilhelmina Caroline Oldenburg. He a great grandson of King George II of Great Britain and Ireland. Coefficient of inbreeding 6.89%.
On 13 Feb 1797 Wilhelm Hesse-Kassel and Princess Augusta of Prussia were married. She the daughter of Frederick William II King Prussia and Queen Frederica Louisa of Prussia. He the son of William Elector of Hesse and Electress Wilhelmina Caroline Oldenburg. They were third cousins. He a great grandson of King George II of Great Britain and Ireland. She a great x 2 granddaughter of King George I of Great Britain and Ireland.
On 20 Nov 1847 Wilhelm Hesse-Kassel died.
Marie Friederike Hesse-Kassel:
On 14 Sep 1768 she was born to William Elector of Hesse and Electress Wilhelmina Caroline Oldenburg. She a great granddaughter of King George II of Great Britain and Ireland. Coefficient of inbreeding 6.89%.
On 17 Apr 1839 Marie Friederike Hesse-Kassel died.
Karoline Amalie Hesse-Kassel Duchess Saxe Gotha Altenburg:
On 11 Jul 1771 she was born to William Elector of Hesse and Electress Wilhelmina Caroline Oldenburg. She a great granddaughter of King George II of Great Britain and Ireland. Coefficient of inbreeding 6.89%.
On 24 Apr 1802 Duke Augustus of Saxe Coburg Altenburg and she were married at Kassel. She the daughter of William Elector of Hesse and Electress Wilhelmina Caroline Oldenburg. He the son of Duke Ernest of Saxe Coburg Altenburg and Charlotte Saxe Meiningen Duchess Saxe Gotha Altenburg. She a great granddaughter of King George II of Great Britain and Ireland.
On 20 Apr 1804 Duke Ernest of Saxe Coburg Altenburg died at Gotha. His son Duke Augustus of Saxe Coburg Altenburg succeeded Duke Saxe Gotha Altenburg. She by marriage Duchess Saxe Gotha Altenburg.
On 22 Feb 1848 Karoline Amalie Hesse-Kassel Duchess Saxe Gotha Altenburg died.
1795. Wilhelm Bottner (age 42). Portrait of William Elector of Hesse (age 51).
On 13 Feb 1797 [his son] Wilhelm Hesse-Kassel (age 19) and [his daughter-in-law] Princess Augusta of Prussia (age 16) were married. She the daughter of Frederick William II King Prussia (age 52) and Queen Frederica Louisa of Prussia (age 45). He the son of William Elector of Hesse (age 53) and Electress Wilhelmina Caroline Oldenburg (age 49). They were third cousins. He a great grandson of King George II of Great Britain and Ireland. She a great x 2 granddaughter of King George I of Great Britain and Ireland.
On 24 Apr 1802 [his son-in-law] Duke Augustus of Saxe Coburg Altenburg (age 29) and [his daughter] Karoline Amalie Hesse-Kassel Duchess Saxe Gotha Altenburg (age 30) were married at Kassel. She the daughter of William Elector of Hesse (age 58) and Electress Wilhelmina Caroline Oldenburg (age 54). He the son of Duke Ernest of Saxe Coburg Altenburg (age 57) and Charlotte Saxe Meiningen Duchess Saxe Gotha Altenburg (age 50). She a great granddaughter of King George II of Great Britain and Ireland.
In 1803 William Elector of Hesse (age 59) was appointed Elector Hesse. [his wife] Electress Wilhelmina Caroline Oldenburg (age 55) by marriage Electress Hesse.
On 07 Dec 1805 [his brother-in-law] Prince Frederick Oldenburg (age 52) died.
On 19 Jan 1820 [his wife] Electress Wilhelmina Caroline Oldenburg (age 72) died.
On 27 Feb 1821 William Elector of Hesse (age 77) died.
Kings Wessex: Great x 21 Grand Son of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 18 Grand Son of Owain "Great" King Gwynedd
Kings Seisyllwg: Great x 24 Grand Son of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 19 Grand Son of Maredudd ap Bleddyn King Powys
Kings England: Grand Son of King George II of Great Britain and Ireland
Kings Scotland: Great x 14 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 11 Grand Son of Charles "Beloved Mad" VI King France
Great x 4 Grandfather: Landgrave Maurice of Hesse-Kassel 11 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Landgrave William V of Hesse-Kassel 12 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 2 Grandfather: Wilhelm "The Just" VI Hesse-Kassel 13 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 1 Grandfather: Charles I Landgrave Hesse-Kassel 12 x Great Grand Son of King Henry III of England
Great x 4 Grandfather: John Sigismund Hohenzollern 13 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: George William Hohenzollern 12 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Anna Hohenzollern 11 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandmother: Hedwig Sophia Hohenzollern 11 x Great Grand Daughter of King Henry III of England
Great x 4 Grandfather: Frederick IV Elector Palatine
11 x Great Grand Son of King Edward "Longshanks" I of England
Great x 3 Grandmother: Elisabeth Charlotte Palatinate Simmern
10 x Great Grand Daughter of King Henry III of England
Great x 4 Grandmother: Electress Louise Juliana of the Palatine Rhine 9 x Great Grand Daughter of King Henry III of England
GrandFather: William Hesse-Kassel 13 x Great Grand Son of King Henry III of England
Great x 4 Grandfather: Gotthard Kettler
Great x 3 Grandfather: William Kettler Duke Courland 12 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Anna Mecklenburg-Schwerin 11 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandfather: Jacob Kettler 12 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Albert Frederick Hohenzollern Duke Prussia 10 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandmother: Sophie Hohenzollern 11 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 1 Grandmother: Maria Amalia of Courland Landgravine Hesse-Kassel 12 x Great Grand Daughter of King Henry III of England
Great x 4 Grandfather: John Sigismund Hohenzollern 13 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: George William Hohenzollern 12 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Anna Hohenzollern 11 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandmother: Louise Charlotte Hohenzollern 11 x Great Grand Daughter of King Henry III of England
Great x 4 Grandfather: Frederick IV Elector Palatine 11 x Great Grand Son of King Edward "Longshanks" I of England
Great x 3 Grandmother: Elisabeth Charlotte Palatinate Simmern 10 x Great Grand Daughter of King Henry III of England
Great x 4 Grandmother: Electress Louise Juliana of the Palatine Rhine 9 x Great Grand Daughter of King Henry III of England
Father: Frederick Hesse-Kassel 14 x Great Grand Son of King Henry III of England
William Elector of Hesse Grand Son of King George II of Great Britain and Ireland
Great x 3 Grandfather: George Hanover Duke Brunswick-Lüneburg
Great x 2 Grandfather: Ernest Augustus Hanover Elector Brunswick-Lüneburg 13 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Landgrave Louis V of Hesse-Darmstadt 11 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandmother: Anne Eleonore Hesse Darmstadt Duchess Brunswick-Lüneburg 12 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 1 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 IV Elector Palatine 11 x Great Grand Son of King Edward "Longshanks" I of England
Great x 3 Grandfather: Frederick Palatinate Simmern V Elector Palatine Rhine 10 x Great Grand Son of King Henry III of England
Great x 4 Grandmother: Electress Louise Juliana of the Palatine Rhine 9 x Great Grand Daughter of King Henry III of England
Great x 2 Grandmother: Sophia Palatinate Simmern Grand Daughter of King James I of England and Ireland and VI of Scotland
Great x 4 Grandfather: King James I of England and Ireland and VI of Scotland 2 x Great Grand Son of King Henry VII of England and Ireland
Great x 3 Grandmother: Princess Elizabeth Stewart Queen Bohemia
Daughter of King James I of England and Ireland and VI of Scotland
Great x 4 Grandmother: Anne of Denmark Queen Consort Scotland England and Ireland 12 x Great Grand Daughter of King Henry "Curtmantle" II of England
GrandFather: King George II of Great Britain and Ireland Son of King George I of Great Britain and Ireland
Great x 3 Grandfather: George Hanover Duke Brunswick-Lüneburg
Great x 2 Grandfather: George Wilhelm Hanover Duke Brunswick-Lüneburg 13 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Landgrave Louis V of Hesse-Darmstadt 11 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandmother: Anne Eleonore Hesse Darmstadt Duchess Brunswick-Lüneburg 12 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 1 Grandmother: Sophia Dorothea Hanover Queen Consort England 14 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandmother: Eleonore Esmier D'Olbreuse Duchess Brunswick-Lüneburg
Mother: Mary Hanover Daughter of King George II of Great Britain and Ireland
Great x 4 Grandfather: John George Hohenzollern Margrave of Brandenburg 11 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Joachim Ernst Hohenzollern 12 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 2 Grandfather: Albert Hohenzollern 13 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 1 Grandfather: John Frederick Hohenzollern 14 x Great Grand Son of King Henry "Curtmantle" II of England
GrandMother: Caroline Hohenzollern Queen Consort England 15 x Great Grand Daughter of King Henry "Curtmantle" II of England