William Cavendish 7th Duke Devonshire 1808-1891

Paternal Family Tree: Cavendish

On 18th July 1807 [his father] William Cavendish [aged 24] and [his mother] Louisa O'Callaghan were married. He the son of [his grandfather] George Augustus Henry Cavendish 1st Earl Burlington [aged 53] and [his grandmother] Elizabeth Compton Countess Burlington [aged 47].

On 27th April 1808 William Cavendish 7th Duke Devonshire was born to William Cavendish [aged 25] and Louisa O'Callaghan.

On 15th January 1812 [his father] William Cavendish [aged 29] died.

Around 1828. George Hayter [aged 35]. Portrait of William Cavendish 7th Duke Devonshire [aged 19].

In 1829 William Cavendish 7th Duke Devonshire [aged 20] and Blanche Georgiana Howard [aged 16] were married. She the daughter of George Howard 6th Earl Carlisle [aged 55] and Georgiana Cavendish Countess Carlisle [aged 45]. They were second cousins.

On 8th October 1831 [his son] William Cavendish was born to William Cavendish 7th Duke Devonshire [aged 23] and [his wife] Blanche Georgiana Howard [aged 19]. Coefficient of inbreeding 1.65%. He died aged two in 1834.

On 23rd July 1833 [his son] Spencer Cavendish 8th Duke Devonshire was born to William Cavendish 7th Duke Devonshire [aged 25] and [his wife] Blanche Georgiana Howard [aged 21]. Coefficient of inbreeding 1.65%. He married 16th August 1892 Louisa Vonalten Duchess Devonshire and Manchester.

On 4th May 1834 [his grandfather] George Augustus Henry Cavendish 1st Earl Burlington [aged 80] died. His grandson William [aged 26] succeeded 2nd Earl Burlington.

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.

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After 4th May 1834 George Henry Cavendish [aged 23] was elected MP North Derbyshire succeededing his older brother William [aged 26] when William succeeded his grandfather George Augustus Henry Cavendish 1st Earl Burlington [deceased] as Earl Burlington. He held the seat until his death in 1880.

On 15th May 1834 [his son] William Cavendish [aged 2] died.

On 16th March 1835 [his daughter] Louisa Caroline Cavendish was born to William Cavendish 7th Duke Devonshire [aged 26] and [his wife] Blanche Georgiana Howard [aged 23]. Coefficient of inbreeding 1.65%. She married 26th September 1865 her second cousin once removed Francis Leveson-Gower aka Egerton, son of Francis Leveson Gower aka Egerton 1st Earl Ellesmere and Harriet Greville Countess Ellesmere, and had issue.

On 30th November 1836 [his son] Frederick Charles Cavendish was born to William Cavendish 7th Duke Devonshire [aged 28] and [his wife] Blanche Georgiana Howard [aged 24] at Compton Place Eastbourne. Coefficient of inbreeding 1.65%. He married 7th June 1864 his third cousin Lucy Caroline Lyttelton, daughter of George William Lyttelton 4th Baron Lyttelton and Mary Glynne Lady Lyttelton.

On 28th January 1838 [his son] Edward Cavendish was born to William Cavendish 7th Duke Devonshire [aged 29] and [his wife] Blanche Georgiana Howard [aged 26] at Marylebone. Coefficient of inbreeding 1.65%. He married 3rd August 1865 his first cousin Emma Elizabeth Lascelles, daughter of William Lascelles and Caroline Georgiana Howard, and had issue.

On 27th April 1840 [his wife] Blanche Georgiana Howard [aged 28] died.

In 1858 Queen Victoria of the United Kingdom [aged 38] appointed five Knights of the Garter:

720th Frederick III King Prussia [aged 26].

721st Arthur Wellesley 2nd Duke Wellington [aged 50].

722nd William Cavendish 7th Duke Devonshire [aged 49].

723rd King Pedro V of Portugal [aged 20].

724th The Prince of Wales [aged 16].

On 7th June 1864 Frederick Charles Cavendish [aged 27] and Lucy Caroline Lyttelton [aged 22] were married. No issue. He the son of William Cavendish 7th Duke Devonshire [aged 56] and Blanche Georgiana Howard. They were third cousins.

On 3rd August 1865 Edward Cavendish [aged 27] and Emma Elizabeth Lascelles were married. He the son of William Cavendish 7th Duke Devonshire [aged 57] and Blanche Georgiana Howard. They were first cousins.

On 26th September 1865 [his son-in-law] Francis Leveson-Gower aka Egerton [aged 41] and Louisa Caroline Cavendish [aged 30] were married. She the daughter of William Cavendish 7th Duke Devonshire [aged 57] and Blanche Georgiana Howard. He the son of Francis Leveson Gower aka Egerton 1st Earl Ellesmere and Harriet Greville Countess Ellesmere [aged 62]. They were second cousin once removed.

On 6th May 1882 [his son] Frederick Charles Cavendish [aged 45] was assassinated at Phoenix Park, Dublin during the Phoenix Park Killings. He was buried in the Cavendish Plot, St Peter's Church, Edensor [Map].

Memoires of Jacques du Clercq

This is a translation of the 'Memoires of Jacques du Clercq', published in 1823 in two volumes, edited by Frederic, Baron de Reissenberg. In his introduction Reissenberg writes: 'Jacques du Clercq tells us that he was born in 1424, and that he was a licentiate in law and a counsellor to Philip the Good, Duke of Burgundy, in the castellany of Douai, Lille, and Orchies. It appears that he established his residence at Arras. In 1446, he married the daughter of Baldwin de la Lacherie, a gentleman who lived in Lille. We read in the fifth book of his Memoirs that his father, also named Jacques du Clercq, had married a lady of the Le Camelin family, from Compiègne. His ancestors, always attached to the counts of Flanders, had constantly served them, whether in their councils or in their armies.' The Memoires cover a period of nineteen years beginning in in 1448, ending in in 1467. It appears that the author had intended to extend the Memoirs beyond that date; no doubt illness or death prevented him from carrying out this plan. As Reissenberg writes the 'merit of this work lies in the simplicity of its narrative, in its tone of good faith, and in a certain air of frankness which naturally wins the reader’s confidence.' Du Clercq ranges from events of national and international importance, including events of the Wars of the Roses in England, to simple, everyday local events such as marriages, robberies, murders, trials and deaths, including that of his own father in Book 5; one of his last entries.

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On 18th May 1891 [his son] Edward Cavendish [aged 53] died. Monument to Edward Cavendish in Cartmel Priory, Lancashire [Map].

Edward Cavendish: On 28th January 1838 he was born to William Cavendish 7th Duke Devonshire and Blanche Georgiana Howard at Marylebone. Coefficient of inbreeding 1.65%. On 3rd August 1865 Edward Cavendish and Emma Elizabeth Lascelles were married. He the son of William Cavendish 7th Duke Devonshire and Blanche Georgiana Howard. They were first cousins.

On 21st December 1891 William Cavendish 7th Duke Devonshire [aged 83] died. He was buried at the Cavendish Plot, St Peter's Church, Edensor [Map]. His son Spencer [aged 58] succeeded 8th Duke Devonshire, 11th Earl Devonshire, 3rd Earl Burlington, 11th Baron Cavendish Hardwick.

Royal Ancestors of William Cavendish 7th Duke Devonshire 1808-1891

Kings Wessex: Great x 24 Grand Son of King Edmund "Ironside" I of England

Kings Gwynedd: Great x 20 Grand Son of Owain "Great" King Gwynedd

Kings Seisyllwg: Great x 25 Grand Son of Hywel "Dda aka Good" King Seisyllwg King Deheubarth

Kings Powys: Great x 21 Grand Son of Maredudd ap Bleddyn King Powys

Kings Godwinson: Great x 24 Grand Son of King Harold II of England

Kings England: Great x 10 Grand Son of King Henry VII of England and Ireland

Kings Scotland: Great x 15 Grand Son of King Robert III of Scotland

Kings France: Great x 13 Grand Son of Charles "Beloved Mad" VI King France

Kings Duke Aquitaine: Great x 28 Grand Son of Ranulf I Duke Aquitaine

Kings Spain: Great x 20 Grand Son of Alfonso VII King Castile VII King Leon

Ancestors of William Cavendish 7th Duke Devonshire 1808-1891

Great x 4 Grandfather: William Cavendish 1st Duke Devonshire 9 x Great Grandson of King Edward III of England

Great x 3 Grandfather: William Cavendish 2nd Duke Devonshire 10 x Great Grandson of King Edward III of England

Great x 4 Grandmother: Mary Butler Duchess Devonshire 10 x Great Granddaughter of King Edward III of England

Great x 2 Grandfather: William Cavendish 3rd Duke Devonshire 10 x Great Grandson of King Henry IV of England

Great x 4 Grandfather: William Russell 9 x Great Grandson of King Robert III of Scotland

Great x 3 Grandmother: Rachel Russell Duchess Devonshire 9 x Great Granddaughter of King Henry IV of England

Great x 4 Grandmother: Rachel Wriothesley 8 x Great Granddaughter of King Henry IV of England

Great x 1 Grandfather: William Cavendish 4th Duke Devonshire 11 x Great Grandson of King Henry IV of England

Great x 4 Grandfather: Charles Hoskins

Great x 3 Grandfather: John Hoskins of Oxted

Great x 2 Grandmother: Catherine Hoskins Duchess Devonshire

Great x 4 Grandfather: William Hale

Great x 3 Grandmother: Catherine Hale

Grandfather: George Augustus Henry Cavendish 1st Earl Burlington 8 x Great Grandson of King Henry VII of England and Ireland

Great x 4 Grandfather: Charles Boyle 3rd Baron Clifford 9 x Great Grandson of King Edward III of England

Great x 3 Grandfather: Charles Boyle 2nd Earl Burlington 5 x Great Grandson of King Henry VII of England and Ireland

Great x 4 Grandmother: Jane Seymour 4 x Great Granddaughter of King Henry VII of England and Ireland

Great x 2 Grandfather: Richard Boyle 3rd Earl Burlington 6 x Great Grandson of King Henry VII of England and Ireland

Great x 4 Grandfather: Henry Noel 22 x Great Grandson of Hugh I King of the Franks

Great x 3 Grandmother: Juliana Noel Countess Burlington 23 x Great Granddaughter of Hugh I King of the Franks

Great x 1 Grandmother: Charlotte Elizabeth Boyle Marchioness Hartington 7 x Great Granddaughter of King Henry VII of England and Ireland

Great x 4 Grandfather: George Savile 1st Marquess Halifax 9 x Great Grandson of King Edward III of England

Great x 3 Grandfather: William Savile 2nd Marquess Halifax 10 x Great Grandson of King Edward III of England

Great x 4 Grandmother: Dorothy Spencer Lady Savile 9 x Great Granddaughter of King Edward III of England

Great x 2 Grandmother: Dorothy Savile Countess Burlington 11 x Great Granddaughter of King Edward III of England

Great x 4 Grandfather: Daniel Finch 2nd Earl Nottingham 7th Earl Winchilsea 10 x Great Grandson of King Edward III of England

Great x 3 Grandmother: Mary Finch Duchess Roxburghe 10 x Great Granddaughter of King Edward III of England

Great x 4 Grandmother: Essex Rich Countess Nottingham 9 x Great Granddaughter of King Edward III of England

father: William Cavendish 9 x Great Grandson of King Henry VII of England and Ireland

Great x 4 Grandfather: James Compton 3rd Earl of Northampton 8 x Great Grandson of King Edward III of England

Great x 3 Grandfather: George Compton 4th Earl of Northampton 9 x Great Grandson of King Edward III of England

Great x 4 Grandmother: Mary Noel Countess Northampton 22 x Great Granddaughter of Hugh I King of the Franks

Great x 2 Grandfather: Charles Compton 10 x Great Grandson of King Edward III of England

Great x 4 Grandfather: Stephen Fox

Great x 3 Grandmother: Jane Fox Countess Northampton

Great x 4 Grandmother: Elizabeth Whittle

Great x 1 Grandfather: Charles Compton 7th Earl of Northampton 11 x Great Grandson of King Edward III of England

Great x 4 Grandfather: Kingsmill Lucy 2nd Baronet

Great x 3 Grandfather: Berkeley Lucy 3rd Baronet 9 x Great Grandson of King Edward III of England

Great x 4 Grandmother: Theophila Berkeley 8 x Great Granddaughter of King Edward III of England

Great x 2 Grandmother: Mary Lucy 10 x Great Granddaughter of King Edward III of England

Great x 4 Grandfather: Charles Cotton

Great x 3 Grandmother: Catherine Cotton 9 x Great Granddaughter of King Edward III of England

Great x 4 Grandmother: Isabella Hutchinson 8 x Great Granddaughter of King Edward III of England

Grandmother: Elizabeth Compton Countess Burlington 12 x Great Granddaughter of King Edward III of England

Great x 4 Grandfather: Charles Somerset Marquess Worcester 10 x Great Grandson of King Edward III of England

Great x 3 Grandfather: Henry Somerset 2nd Duke Beaufort 11 x Great Grandson of King Edward III of England

Great x 4 Grandmother: Rebecca Child Marchioness Worcester

Great x 2 Grandfather: Charles Noel Somerset 4th Duke Beaufort 11 x Great Grandson of King Henry IV of England

Great x 4 Grandfather: Wriothesley Baptist Noel 2nd Earl Gainsborough 9 x Great Grandson of King Henry IV of England

Great x 3 Grandmother: Rachel Noel Duchess Beaufort 10 x Great Granddaughter of King Henry IV of England

Great x 4 Grandmother: Catherine Greville Duchess Buckingham and Normandby 10 x Great Granddaughter of King Edward III of England

Great x 1 Grandmother: Anne Somerset Countess Northampton 12 x Great Granddaughter of King Henry IV of England

Great x 4 Grandfather: Richard Berkeley 11 x Great Grandson of King Edward I of England

Great x 3 Grandfather: John Symes Berkeley 12 x Great Grandson of King Edward I of England

Great x 2 Grandmother: Elizabeth Berkeley Duchess Beaufort 13 x Great Granddaughter of King Edward I of England

Great x 3 Grandmother: Elizabeth Norborne

William Cavendish 7th Duke Devonshire 10 x Great Grandson of King Henry VII of England and Ireland

mother: Louisa O'Callaghan