Biography of William Cavendish 1917-1944
Paternal Family Tree: Cavendish
Maternal Family Tree: Elizabeth Milbanke Viscountess Melbourne 1751-1818
William Cavendish educated at Trinity College, Cambridge University [Map].
William Cavendish educated at Eton College [Map].
In 1917 [his father] Edward William Spencer Cavendish 10th Duke Devonshire (age 21) and [his mother] Mary Alice Gascoyne-Cecil Duchess Devonshire (age 21) were married. She the daughter of [his grandfather] James Gascoyne-Cecil 4th Marquess Salisbury (age 55) and [his grandmother] Cicely Anne Gore Marchioness Salisbury (age 49). He the son of [his grandfather] Victor Christian William Cavendish 9th Duke Devonshire (age 48) and [his grandmother] Evelyn Emily Mary Petty-Fitzmaurice Duchess Devonshire (age 46).
On 10 Dec 1917 William Cavendish was born to Edward William Spencer Cavendish 10th Duke Devonshire (age 22) and Mary Alice Gascoyne-Cecil Duchess Devonshire (age 22).
On 06 May 1938 [his grandfather] Victor Christian William Cavendish 9th Duke Devonshire (age 69) died at Chatsworth House [Map]. He was buried at Cavendish Plot, St Peter's Church, Edensor [Map]. His son [his father] Edward William Spencer Cavendish 10th Duke Devonshire (age 43) succeeded 10th Duke Devonshire, 13th Earl Devonshire, 5th Earl Burlington, 13th Baron Cavendish Hardwick. [his mother] Mary Alice Gascoyne-Cecil Duchess Devonshire (age 42) by marriage Duchess Devonshire. On 02 Apr 1960 [his grandmother] Evelyn Emily Mary Petty-Fitzmaurice Duchess Devonshire (age 89) died. Both the Duke and Duchess were buried in the Cavendish Plot, St Peter's Church, Edensor [Map].
Evelyn Emily Mary Petty-Fitzmaurice Duchess Devonshire: On 27 Aug 1870 she was born to Henry Petty-Fitzmaurice 5th Marquess Lansdowne. On 30 Jul 1892 Victor Christian William Cavendish 9th Duke Devonshire and she were married. She by marriage Duchess Devonshire. She the daughter of Henry Petty-Fitzmaurice 5th Marquess Lansdowne.
On 06 May 1944 William Cavendish (age 26) and Kathleen "Kick" Kennedy (age 24) were married at Chelsea Register Office. She the daughter of Joseph Patrick Kennedy (age 55) and Rose Elizabeth Fitzgerald (age 53). He the son of Edward William Spencer Cavendish 10th Duke Devonshire (age 49) and Mary Alice Gascoyne-Cecil Duchess Devonshire (age 48).
The Duke of Devonshire and the bride's eldest brother Joseph P. Kennedy Jr (age 28), a lieutenant in the United States Navy, signed the marriage register The Duke of Rutland (age 24) served as best man.
The photos, from left to right, Mary, Duchess of Devonshire, the grooms William, Marquess of Hartington, the bride Kathleen Kennedy, Joseph Kennedy, Edward, 10th Duke of Devonshire.
Kathleen "Kick" Kennedy: On 20 Feb 1920 she was born to Joseph Patrick Kennedy and Rose Elizabeth Fitzgerald at Brookline Massachusetts. On 13 May 1948 Kathleen "Kick" Kennedy and William Henry Lawrence Peter Wentworth-Fitzwilliam 8th and 6th Earl Fitzwilliam died in a plane crash at the Plateau du Coiron, Saint-Bauzile during the course of their journey from Paris. His first cousin once removed Eric Spencer Wentworth-Fitzwilliam 9th and 7th Earl Fitzwilliam succeeded 9th Earl Fitzwilliam, 7th Earl Fitzwilliam, 11th Baron Fitzwilliam of Liffer in Donegal. His wealth, estimated at 45 million pounds, including half of the Wentworth Woodhouse estate, the Coolattin estate in County Wicklow, Ireland, and a large part of the Fitzwilliam art collection went to his daughter Ann Juliet Dorothea Maud Wentworth-Fitzwilliam Marchioness Bristol.
Joseph Patrick Kennedy: On 25 Jul 1915 he was born to Joseph Patrick Kennedy and Rose Elizabeth Fitzgerald. On 12 Aug 1944 Joseph Patrick Kennedy was killed at Blythburgh, Suffolk when his plane exploded over the English Channel during a top-secret mission.
On 09 Sep 1944 William Cavendish (age 26) was killed in action by a sniper whilst leading a company trying to capture the town of Heppen in Belgium. He was buried at the Leopoldsburg War Cemetery.
After 1945. St Peter's Church, Edensor [Map]. Memorial to those who fell in the Second World War including William Cavendish, heir to the Duke of Devonshire.
On 13 May 1948 [his former wife] Kathleen "Kick" Kennedy (age 28) and William Henry Lawrence Peter Wentworth-Fitzwilliam 8th and 6th Earl Fitzwilliam (age 37) died in a plane crash at the Plateau du Coiron, Saint-Bauzile during the course of their journey from Paris [Map]. His first cousin once removed Eric Spencer Wentworth-Fitzwilliam 9th and 7th Earl Fitzwilliam (age 64) succeeded 9th Earl Fitzwilliam, 7th Earl Fitzwilliam, 11th Baron Fitzwilliam of Liffer in Donegal. His wealth, estimated at 45 million pounds, including half of the Wentworth Woodhouse estate, the Coolattin estate in County Wicklow, Ireland, and a large part of the Fitzwilliam art collection went to his daughter Ann Juliet Dorothea Maud Wentworth-Fitzwilliam Marchioness Bristol (age 13).
On 26 Nov 1950 [his father] Edward William Spencer Cavendish 10th Duke Devonshire (age 55) died. His son [his brother] Andrew Cavendish 11th Duke Devonshire (age 30) succeeded 11th Duke Devonshire, 14th Earl Devonshire, 6th Earl Burlington, 14th Baron Cavendish Hardwick. Deborah Vivien Mitford Duchess Devonshire (age 30) by marriage Duchess Devonshire. On 24 Dec 1988 [his mother] Mary Alice Gascoyne-Cecil Duchess Devonshire (age 93) died. Both the Duke and Duchess were buried in the Cavendish Plot, St Peter's Church, Edensor [Map].
Kings Wessex: Great x 24 Grand Son of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 21 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 22 Grand Son of Maredudd ap Bleddyn King Powys
Kings England: Great x 14 Grand Son of King Edward IV of England
Kings Scotland: Great x 23 Grand Son of King Duncan I of Scotland
Kings Franks: Great x 21 Grand Son of Louis VII King Franks
Kings France: Great x 17 Grand Son of Philip IV King France
Great x 4 Grandfather: George Augustus Henry Cavendish 1st Earl Burlington 8 x Great Grand Son of King Henry VII of England and Ireland
Great x 3 Grandfather: William Cavendish 9 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandmother: Elizabeth Compton Countess Burlington 
12 x Great Grand Daughter of King Edward III of England
Great x 2 Grandfather: William Cavendish 7th Duke Devonshire 10 x Great Grand Son of King Henry VII of England and Ireland
Great x 3 Grandmother: Louisa Ocallaghan
Great x 1 Grandfather: Edward Cavendish 11 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandfather: Frederick Howard 5th Earl Carlisle 
11 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: George Howard 6th Earl Carlisle 9 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandmother: Margaret Caroline Leveson-Gower Countess Carlisle 8 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 2 Grandmother: Blanche Georgiana Howard Duchess Devonshire 10 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandfather: William Cavendish 5th Duke Devonshire 8 x Great Grand Son of King Henry VII of England and Ireland
Great x 3 Grandmother: Georgiana Cavendish Countess Carlisle 9 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandmother: Georgiana Spencer Duchess Devonshire 
10 x Great Grand Daughter of King Henry VII of England and Ireland
GrandFather: Victor Christian William Cavendish 9th Duke Devonshire 12 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandfather: Edward Lascelles 1st Earl Harewood 
Great x 3 Grandfather: Henry Lascelles 2nd Earl Harewood
Great x 4 Grandmother: Anne Chaloner Baroness Harewood
Great x 2 Grandfather: William Lascelles
Great x 3 Grandmother: Henrietta Sebright Countess Harewood
Great x 1 Grandmother: Emma Elizabeth Lascelles 11 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandfather: Frederick Howard 5th Earl Carlisle 11 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: George Howard 6th Earl Carlisle 9 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandmother: Margaret Caroline Leveson-Gower Countess Carlisle 8 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 2 Grandmother: Caroline Georgiana Howard 10 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandfather: William Cavendish 5th Duke Devonshire 8 x Great Grand Son of King Henry VII of England and Ireland
Great x 3 Grandmother: Georgiana Cavendish Countess Carlisle 9 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandmother: Georgiana Spencer Duchess Devonshire 10 x Great Grand Daughter of King Henry VII of England and Ireland
Father: Edward William Spencer Cavendish 10th Duke Devonshire 13 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandfather: William Petty 1st Marquess Lansdowne
Great x 3 Grandfather: Henry Petty-Fitzmaurice 3rd Marquess Lansdowne 12 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Louisa Fitzpatrick Marchioness Lansdowne 11 x Great Grand Daughter of King Edward III of England
Great x 2 Grandfather: Henry Thomas Petty-Fitzmaurice 4th Marquess Lansdowne 13 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Henry Thomas Fox-Strangways 2nd Earl of Ilchester 
12 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Louisa Fox-Strangways Marchioness Lansdowne 13 x Great Grand Daughter of King Edward III of England
Great x 1 Grandfather: Henry Petty-Fitzmaurice 5th Marquess Lansdowne 14 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Charles Joseph Comte de Flahaut
Great x 2 Grandmother: Emily Jane de Flahaut Marchioness Lansdowne 20 x Great Grand Daughter of King John "Lackland" of England
Great x 4 Grandfather: George Keith Elphinstone 1st Viscount Keith 18 x Great Grand Son of King John "Lackland" of England
Great x 3 Grandmother: Margaret Mercer Elphinstone Countess Flahaut and 2nd Baroness Keith 19 x Great Grand Daughter of King John "Lackland" of England
Great x 4 Grandmother: Jane Mercer
GrandMother: Evelyn Emily Mary Petty-Fitzmaurice Duchess Devonshire 15 x Great Grand Daughter of King Edward III of England
William Cavendish 14 x Great Grand Son of King Edward IV of England
Great x 4 Grandfather: James "Wicked Earl" Cecil 1713-1780 8 x Great Grand Son of King Edward IV of England
Great x 3 Grandfather: James Cecil 1st Marquess Salisbury 9 x Great Grand Son of King Edward IV of England
Great x 4 Grandmother: Elizabeth Keet Countess of Salisbury
Great x 2 Grandfather: James Brownlow William Gascoyne-Cecil 2nd Marquess Salisbury 10 x Great Grand Son of King Edward IV of England
Great x 4 Grandfather: Wills Hill 1st Marquess Downshire
Great x 3 Grandmother: Mary Amelia Hill Marchioness Salisbury 10 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Margaretta Fitzgerald 9 x Great Grand Daughter of King Edward III of England
Great x 1 Grandfather: Robert Arthur Talbot Gascoyne-Cecil 3rd Marquess Salisbury 11 x Great Grand Son of King Edward IV of England
Great x 4 Grandfather: Bamber Gascoigne "The Elder"
Great x 3 Grandfather: Bamber "The Younger" Gascoyne
Great x 4 Grandmother: Mary Green
Great x 2 Grandmother: Frances Mary Gascoyne Marchioness Salisbury
Great x 4 Grandfather: Chase Price
Great x 3 Grandmother: Sarah Bridget Frances Price
Great x 4 Grandmother: Susan Evelyn
GrandFather: James Gascoyne-Cecil 4th Marquess Salisbury 12 x Great Grand Son of King Edward IV of England
Mother: Mary Alice Gascoyne-Cecil Duchess Devonshire 13 x Great Grand Daughter of King Edward IV of England
Great x 4 Grandfather: Arthur Saunders Gore 2nd Earl Arran
Great x 3 Grandfather: William John Gore 12 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Catherine Annesley 11 x Great Grand Daughter of King Edward III of England
Great x 2 Grandfather: Philip Gore 4th Earl Arran 13 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Thomas Hales 4th Baronet 18 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandmother: Caroline Hales 19 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 1 Grandfather: Arthur Saunders Gore 5th Earl Arran 14 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: William Francis Patrick Napier
Great x 2 Grandmother: Elizabeth Marianne Napier Countess Arran
GrandMother: Cicely Anne Gore Marchioness Salisbury 13 x Great Grand Daughter of King Henry IV of England
Great x 4 Grandfather: Robert Jocelyn 2nd Earl Roden 12 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Robert Jocelyn 3rd Earl Roden 13 x Great Grand Son of King Edward III of England
Great x 2 Grandfather: Robert Jocelyn 11 x Great Grand Son of King Henry IV of England
Great x 4 Grandfather: Thomas Stapleton 12th Baron Despencer 
9 x Great Grand Son of King Henry IV of England
Great x 3 Grandmother: Maria Frances Catherine Stapleton Countess Roden 10 x Great Grand Daughter of King Henry IV of England
Great x 4 Grandmother: Elizabeth Eliot Baroness Despencer
Great x 1 Grandmother: Edith Jocelyn Countess Arran 12 x Great Grand Daughter of King Henry IV of England
Great x 4 Grandfather: George Nassau Clavering-Cowper 3rd Earl Cowper 13 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Peter Nassau Clavering-Cowper 5th Earl Cowper 14 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Hannah Anna Gore 3rd Countess Cowper
Great x 2 Grandmother: Frances Elizabeth Cowper 14 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Penistone Lamb 1st Viscount Melbourne
Great x 3 Grandmother: Emily Lamb Countess Cowper 13 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Elizabeth Milbanke Viscountess Melbourne 12 x Great Grand Daughter of King Edward III of England