William Cavendish-Bentinck 3rd Duke Portland 1738-1809

Paternal Family Tree: Bentinck

Maternal Family Tree: Eleanor Gifford 1575-

On 11th June 1734 [his father] William Bentinck 2nd Duke Portland [aged 25] and [his mother] Margaret Cavendish Harley 2nd Duchess Portland [aged 19] were married at St Peter aka Oxford Chapel Vere Street Marylebone [Map]. She by marriage Duchess Portland. She the daughter of [his grandfather] Edward Harley 2nd Earl of Oxford and Earl Mortimer [aged 45] and [his grandmother] Henrietta Cavendish Holles Countess of Oxford and Mortimer [aged 40]. He the son of Henry Bentinck 1st Duke Portland and Elizabeth Noel Duchess Portland [aged 46]. They were sixth cousins.

On 14th April 1738 William Cavendish-Bentinck 3rd Duke Portland was born to William Bentinck 2nd Duke Portland [aged 29] and Margaret Cavendish Harley 2nd Duchess Portland [aged 23] at Welbeck Abbey, Nottinghamshire [Map].

In 1759 [his brother-in-law] Thomas Thynne 1st Marquess of Bath [aged 24] and [his sister] Elizabeth Bentinck Marchioness Bath [aged 23] were married. She by marriage Viscountess Weymouth. She the daughter of [his father] William Bentinck 2nd Duke Portland [aged 49] and [his mother] Margaret Cavendish Harley 2nd Duchess Portland [aged 43]. They were third cousins.

On 1st May 1762 [his father] William Bentinck 2nd Duke Portland [aged 53] died. His son William [aged 24] succeeded 3rd Duke Portland, 4th Earl of Portland.

On 28th May 1763 [his brother-in-law] George Grey 5th Earl Stamford 1st Earl Warrington [aged 25] and [his sister] Henrietta Bentinck Countess Stamford and Warrington [aged 26] were married. She by marriage Countess Stamford. She the daughter of [his father] William Bentinck 2nd Duke Portland and [his mother] Margaret Cavendish Harley 2nd Duchess Portland [aged 48]. He the son of Henry Grey 4th Earl Stamford [aged 47] and Mary Booth Countess Stamford [aged 59].

On 8th November 1766 William Cavendish-Bentinck 3rd Duke Portland [aged 28] and Dorothy Cavendish 3rd Duchess Portland [aged 16] were married. She by marriage Duchess Portland. She the daughter of William Cavendish 4th Duke Devonshire and Charlotte Elizabeth Boyle Marchioness Hartington. He the son of William Bentinck 2nd Duke Portland and Margaret Cavendish Harley 2nd Duchess Portland [aged 51]. They were half fourth cousins.

On 23rd June 1768 [his son] William Henry Cavendish-Scott-Bentinck 4th Duke Portland was born to William Cavendish-Bentinck 3rd Duke Portland [aged 30] and [his wife] Dorothy Cavendish 3rd Duchess Portland [aged 17]. He married 4th August 1795 Henrietta Scott Duchess Portland and had issue.

On 7th June 1774 [his brother-in-law] William Cavendish 5th Duke Devonshire [aged 26] and Georgiana Spencer Duchess Devonshire [aged 17] were married at St Mary's Church, Wimbledon. It was her 17th birthday. She by marriage Duchess Devonshire. She the daughter of John Spencer 1st Earl Spencer [aged 39] and Margaret Georgiana Poyntz Countess Spencer [aged 37]. He the son of William Cavendish 4th Duke Devonshire and Charlotte Elizabeth Boyle Marchioness Hartington. They were fourth cousins.

On 14th September 1774 [his son] William Henry Cavendish-Bentinck was born to William Cavendish-Bentinck 3rd Duke Portland [aged 36] and [his wife] Dorothy Cavendish 3rd Duchess Portland [aged 24]. He married 19th February 1803 Mary Acheson, daughter of Arthur Acheson 1st Earl Gosford and Millicent Pole Countess Gosford.

On 3rd October 1775 [his daughter] Charlotte Cavendish-Bentinck was born to William Cavendish-Bentinck 3rd Duke Portland [aged 37] and [his wife] Dorothy Cavendish 3rd Duchess Portland [aged 25]. She married before 26th August 1832 her second cousin twice removed Charles Greville and had issue.

Anne Boleyn. Her Life as told by Lancelot de Carle's 1536 Letter.

In 1536, two weeks after the execution of Anne Boleyn, her brother George and four others, Lancelot du Carle, wrote an extraordinary letter that described Anne's life, and her trial and execution, to which he was a witness. This book presents a new translation of that letter, with additional material from other contemporary sources such as Letters, Hall's and Wriothesley's Chronicles, the pamphlets of Wynkyn the Worde, the Memorial of George Constantyne, the Portuguese Letter and the Baga de Secrets, all of which are provided in Appendices.

Available at Amazon in eBook and Paperback format.

On 13th March 1779 [his daughter] Mary Cavendish-Bentinck was born to William Cavendish-Bentinck 3rd Duke Portland [aged 40] and [his wife] Dorothy Cavendish 3rd Duchess Portland [aged 28].

On 20th May 1780 [his son] Charles Cavendish-Bentinck was born to William Cavendish-Bentinck 3rd Duke Portland [aged 42] and [his wife] Dorothy Cavendish 3rd Duchess Portland [aged 29]. He married (1) 21st September 1808 Georgiana Augusta Frederica Seymour (2) 16th July 1816 Anne Wellesley Lady Abdy, daughter of Richard Wellesley 1st Marquess Wellesley and Hyacinthe Gabrielle Roland Marchioness Wellesley, and had issue.

On 2nd November 1781 [his son] Frederick Cavendish-Bentinck was born to William Cavendish-Bentinck 3rd Duke Portland [aged 43] and [his wife] Dorothy Cavendish 3rd Duchess Portland [aged 31]. He married 16th September 1820 Mary Lowther, daughter of William Lowther 1st Earl Lonsdale and Augusta Fane Countess Lonsdale, and had issue.

On 17th July 1785 [his mother] Margaret Cavendish Harley 2nd Duchess Portland [aged 70] died.

1792. Thomas Lawrence [aged 22]. Portrait of William Cavendish-Bentinck 3rd Duke Portland [aged 53].

In 1794 King George III of Great Britain and Ireland [aged 55] created new Garter Knights as follows:

617th Henry Scott 3rd Duke Buccleuch [aged 47],

618th William Frederick Hanover 2nd Duke Gloucester and Edinburgh [aged 17],

619th William Cavendish-Bentinck 3rd Duke Portland [aged 55].

On 3rd June 1794 [his wife] Dorothy Cavendish 3rd Duchess Portland [aged 43] died. She was buried at St Marylebone Church.

On 4th August 1795 William Henry Cavendish-Scott-Bentinck 4th Duke Portland [aged 27] and Henrietta Scott Duchess Portland [aged 21] were married. She by marriage Duchess Portland. He the son of William Cavendish-Bentinck 3rd Duke Portland [aged 57] and Dorothy Cavendish 3rd Duchess Portland.

On 19th February 1803 William Henry Cavendish-Bentinck [aged 28] and Mary Acheson [aged 16] were married. She the daughter of Arthur Acheson 1st Earl Gosford [aged 58] and Millicent Pole Countess Gosford [aged 53]. He the son of William Cavendish-Bentinck 3rd Duke Portland [aged 64] and Dorothy Cavendish 3rd Duchess Portland.

On 31st March 1807 William Cavendish-Bentinck 3rd Duke Portland [aged 68] was appointed Prime Minister.

On 21st September 1808 Charles Cavendish-Bentinck [aged 28] and Georgiana Augusta Frederica Seymour [aged 26] were married. She the daughter of King George IV of Great Britain and Ireland [aged 46] and Grace Elliott. He the son of William Cavendish-Bentinck 3rd Duke Portland [aged 70] and Dorothy Cavendish 3rd Duchess Portland.

On 30th October 1809 William Cavendish-Bentinck 3rd Duke Portland [aged 71] died. His son William [aged 41] succeeded 4th Duke Portland, 5th Earl of Portland.

The Deeds of the Dukes of Normandy

The Gesta Normannorum Ducum [The Deeds of the Dukes of Normandy] is a landmark medieval chronicle tracing the rise and fall of the Norman dynasty from its early roots through the pivotal events surrounding the Norman Conquest of England. Originally penned in Latin by the monk William of Jumièges shortly before 1060 and later expanded at the behest of William the Conqueror, the work chronicles the deeds, politics, battles, and leadership of the Norman dukes, especially William’s own claim to the English throne. The narrative combines earlier historical sources with firsthand information and oral testimony to present an authoritative account of Normandy’s transformation from a Viking settlement into one of medieval Europe’s most powerful realms. William’s history emphasizes the legitimacy, military prowess, and governance of the Norman line, framing their expansion, including the conquest of England, as both divinely sanctioned and noble in purpose. Later chroniclers such as Orderic Vitalis and Robert of Torigni continued the history, extending the coverage into the 12th century, providing broader context on ducal rule and its impact. Today this classic work remains a foundational source for understanding Norman identity, medieval statesmanship, and the historical forces that reshaped England and Western Europe between 800AD and 1100AD.

Available at Amazon in eBook and Paperback format.

1814. Benjamin West [aged 75]. Portrait of William Cavendish-Bentinck 3rd Duke Portland.

Royal Ancestors of William Cavendish-Bentinck 3rd Duke Portland 1738-1809

Kings Wessex: Great x 21 Grand Son of King Edmund "Ironside" I of England

Kings Gwynedd: Great x 17 Grand Son of Owain "Great" King Gwynedd

Kings Seisyllwg: Great x 23 Grand Son of Hywel "Dda aka Good" King Seisyllwg King Deheubarth

Kings Powys: Great x 18 Grand Son of Maredudd ap Bleddyn King Powys

Kings Godwinson: Great x 22 Grand Son of King Harold II of England

Kings England: Great x 9 Grand Son of King Edward IV of England

Kings Scotland: Great x 16 Grand Son of King William I of Scotland

Kings France: Great x 14 Grand Son of King Philip IV of France

Kings Duke Aquitaine: Great x 25 Grand Son of Ranulf I Duke Aquitaine

Kings Spain: Great x 17 Grand Son of Alfonso VII King Castile VII King Leon

Royal Descendants of William Cavendish-Bentinck 3rd Duke Portland 1738-1809
Number after indicates the number of unique routes of descent. Descendants of Kings and Queens not included.

Queen Elizabeth II of the United Kingdom [1]

Ancestors of William Cavendish-Bentinck 3rd Duke Portland 1738-1809

Great x 1 Grandfather: William Bentinck 1st Earl of Portland

Grandfather: Henry Bentinck 1st Duke Portland 11 x Great Grandson of King Edward III of England

Great x 4 Grandfather: George Villiers of Brokesby

Great x 3 Grandfather: Edward Villiers

Great x 4 Grandmother: Audrey Saunders

Great x 2 Grandfather: Edward Villiers 9 x Great Grandson of King Edward III of England

Great x 4 Grandfather: John St John 7 x Great Grandson of King Edward III of England

Great x 3 Grandmother: Barbara St John 8 x Great Granddaughter of King Edward III of England

Great x 4 Grandmother: Lucy Hungerford 11 x Great Granddaughter of King Henry III of England

Great x 1 Grandmother: Anne Villiers Countess Portland 10 x Great Granddaughter of King Edward III of England

Great x 4 Grandfather: Thomas Howard 1st Earl Suffolk 7 x Great Grandson of King Edward III of England

Great x 3 Grandfather: Theophilus Howard 2nd Earl Suffolk 8 x Great Grandson of King Edward III of England

Great x 4 Grandmother: Catherine Knyvet Countess Suffolk 9 x Great Granddaughter of King Edward I of England

Great x 2 Grandmother: Frances Howard 9 x Great Granddaughter of King Edward III of England

Great x 4 Grandfather: George Home 1st Earl Dunbar

Great x 3 Grandmother: Elizabeth Home Countess Suffolk 15 x Great Granddaughter of King John of England

Great x 4 Grandmother: Elizabeth Gordon Countess Dunbar 14 x Great Granddaughter of King John of England

father: William Bentinck 2nd Duke Portland 11 x Great Grandson of King Henry IV of England

Great x 4 Grandfather: Edward Noel 2nd Viscount Campden 20 x Great Grandson of Hugh I King of the Franks

Great x 3 Grandfather: Baptist Noel 3rd Viscount Campden 21 x Great Grandson of Hugh I King of the Franks

Great x 4 Grandmother: Juliana Hicks Viscountess Campden

Great x 2 Grandfather: Edward Noel 1st Earl Gainsborough 22 x Great Grandson of Hugh I King of the Franks

Great x 4 Grandfather: Thomas Wotton 2nd Baron Wotton

Great x 3 Grandmother: Hester Wotton Viscountess Campden

Great x 1 Grandfather: Wriothesley Baptist Noel 2nd Earl Gainsborough 9 x Great Grandson of King Henry IV of England

Great x 4 Grandfather: Henry Wriothesley 3rd Earl of Southampton 7 x Great Grandson of King Edward III of England

Great x 3 Grandfather: Thomas Wriothesley 4th Earl of Southampton 2nd Earl Chichester 7 x Great Grandson of King Henry IV of England

Great x 4 Grandmother: Elizabeth Vernon Countess Southampton 6 x Great Granddaughter of King Henry IV of England

Great x 2 Grandmother: Elizabeth Wriothesley Countess Gainsborough 8 x Great Granddaughter of King Henry IV of England

Great x 4 Grandfather: Francis Leigh 1st Earl Chichester 21 x Great Grandson of Hugh I King of the Franks

Great x 3 Grandmother: Elizabeth Leigh Countess Southampton 13 x Great Granddaughter of King Edward I of England

Great x 4 Grandmother: Audrey Boteler Countess Chichester 12 x Great Granddaughter of King Edward I of England

Grandmother: Elizabeth Noel Duchess Portland 10 x Great Granddaughter of King Henry IV of England

Great x 4 Grandfather: Fulk Greville 7 x Great Grandson of King Edward III of England

Great x 3 Grandfather: Robert Greville 2nd Baron Brooke 8 x Great Grandson of King Edward III of England

Great x 4 Grandmother: Mary Copley

Great x 2 Grandfather: Fulke Greville 5th Baron Brooke 9 x Great Grandson of King Edward III of England

Great x 4 Grandfather: Francis Russell 4th Earl Bedford 10 x Great Grandson of King John of England

Great x 3 Grandmother: Catherine Russell Baroness Brooke 9 x Great Granddaughter of King Edward III of England

Great x 4 Grandmother: Catherine Brydges Countess Bedford 8 x Great Granddaughter of King Edward III of England

Great x 1 Grandmother: Catherine Greville Duchess Buckingham and Normandby 10 x Great Granddaughter of King Edward III of England

Great x 4 Grandfather: Samuel Dashwood

Great x 3 Grandfather: Francis Dashwood

Great x 2 Grandmother: Sarah Dashwood Baroness Brooke

Great x 4 Grandfather: Richard Sleigh

Great x 3 Grandmother: Alice Sleigh

William Cavendish-Bentinck 3rd Duke Portland 9 x Great Grandson of King Edward IV of England

Great x 4 Grandfather: Thomas Harley

Great x 3 Grandfather: Robert Harley 10 x Great Grandson of King John of England

Great x 4 Grandmother: Margaret Corbet 9 x Great Granddaughter of King John of England

Great x 2 Grandfather: Edward Harley 9 x Great Grandson of King Edward III of England

Great x 4 Grandfather: Edward Conway 1st Viscount Conway 7 x Great Grandson of King Edward III of England

Great x 3 Grandmother: Brilliana Conway 8 x Great Granddaughter of King Edward III of England

Great x 1 Grandfather: Robert Harley 1st Earl of Oxford and Earl Mortimer 10 x Great Grandson of King Edward III of England

Grandfather: Edward Harley 2nd Earl of Oxford and Earl Mortimer 11 x Great Grandson of King Edward III of England

Great x 4 Grandfather: Richard Foley

Great x 3 Grandfather: Thomas Foley

Great x 4 Grandmother: Alice Brindley

Great x 2 Grandfather: Thomas Foley

Great x 1 Grandmother: Elizabeth Foley Countess of Oxford and Mortimer

mother: Margaret Cavendish Harley 2nd Duchess Portland 8 x Great Granddaughter of King Edward IV of England

Great x 4 Grandfather: John Holles 1st Earl de Clare 7 x Great Grandson of King Edward III of England

Great x 3 Grandfather: John Holles 2nd Earl de Clare 7 x Great Grandson of King Edward III of England

Great x 4 Grandmother: Anne Stanhope Countess de Clare 6 x Great Granddaughter of King Edward III of England

Great x 2 Grandfather: Gilbert Holles 3rd Earl de Clare 8 x Great Grandson of King Edward III of England

Great x 4 Grandfather: Horace de Vere 1st Baron Vere 7 x Great Grandson of King Edward I of England

Great x 3 Grandmother: Elizabeth Vere Countess Clare 8 x Great Granddaughter of King Edward I of England

Great x 4 Grandmother: Mary Tracy Baroness Spencer Tilbury

Great x 1 Grandfather: John Holles 1st Duke Newcastle upon Tyne 9 x Great Grandson of King Edward III of England

Great x 4 Grandfather: Robert Pierrepont 1st Earl Kingston 9 x Great Grandson of King Edward I of England

Great x 3 Grandfather: William Pierrepont of Thoresby 8 x Great Grandson of King Edward III of England

Great x 4 Grandmother: Gertrude Talbot Baroness Pierrepont Holme Pierrepoint 7 x Great Granddaughter of King Edward III of England

Great x 2 Grandmother: Grace Pierrepont Countess de Clare 9 x Great Granddaughter of King Edward III of England

Great x 4 Grandfather: Thomas Harries aka Harris 1st Baronet

Great x 3 Grandmother: Elizabeth Harries aka Harris

Great x 4 Grandmother: Eleanor Gifford

Grandmother: Henrietta Cavendish Holles Countess of Oxford and Mortimer 7 x Great Granddaughter of King Edward IV of England

Great x 4 Grandfather: Charles Cavendish 8 x Great Grandson of King Edward I of England

Great x 3 Grandfather: William Cavendish 1st Duke Newcastle upon Tyne 4 x Great Grandson of King Edward IV of England

Great x 4 Grandmother: Catherine Ogle 8th Baroness Ogle 3 x Great Granddaughter of King Edward IV of England

Great x 2 Grandfather: Henry Cavendish 2nd Duke Newcastle upon Tyne 5 x Great Grandson of King Edward IV of England

Great x 4 Grandfather: William Bassett 11 x Great Grandson of King Henry "Curtmantle" II of England

Great x 3 Grandmother: Elizabeth Bassett Countess Newcastle upon Tyne 12 x Great Granddaughter of King Henry "Curtmantle" II of England

Great x 1 Grandmother: Margaret Cavendish Duchess Newcastle upon Tyne 6 x Great Granddaughter of King Edward IV of England

Great x 4 Grandfather: Robert Pierrepont 1st Earl Kingston 9 x Great Grandson of King Edward I of England

Great x 3 Grandfather: William Pierrepont of Thoresby 8 x Great Grandson of King Edward III of England

Great x 4 Grandmother: Gertrude Talbot Baroness Pierrepont Holme Pierrepoint 7 x Great Granddaughter of King Edward III of England

Great x 2 Grandmother: Frances Pierrepont Duchess Newcastle upon Tyne 9 x Great Granddaughter of King Edward III of England

Great x 4 Grandfather: Thomas Harries aka Harris 1st Baronet

Great x 3 Grandmother: Elizabeth Harries aka Harris

Great x 4 Grandmother: Eleanor Gifford