Biography of William Cavendish 7th Duke Devonshire 1808-1891
Paternal Family Tree: Cavendish
On 18 Jul 1807 [his father] William Cavendish (age 24) and [his mother] Louisa Ocallaghan were married. He the son of [his grandfather] George Augustus Henry Cavendish 1st Earl Burlington (age 53) and [his grandmother] Elizabeth Compton Countess Burlington (age 47).
On 27 Apr 1808 William Cavendish 7th Duke Devonshire was born to William Cavendish (age 25) and Louisa Ocallaghan.
Around 1828. George Hayter (age 35). Portrait of William Cavendish 7th Duke Devonshire (age 19).
In 1829 William Cavendish 7th Duke Devonshire (age 20) and Blanche Georgiana Howard Duchess Devonshire (age 16) were married. She the daughter of George Howard 6th Earl Carlisle (age 55) and Georgiana Cavendish Countess Carlisle (age 45). They were second cousins.
On 08 Oct 1831 [his son] William Cavendish was born to William Cavendish 7th Duke Devonshire (age 23) and [his wife] Blanche Georgiana Howard Duchess Devonshire (age 19). Coefficient of inbreeding 1.65%.
On 19 Jul 1833 George Granville Leveson-Gower 1st Duke Sutherland (age 75) died. His son George Sutherland Leveson-Gower 2nd Duke Sutherland (age 46) succeeded 2nd Duke Sutherland, 3rd Marquess Stafford, 20th Earl Sutherland, 4th Earl Gower, 5th Baron Gower, 9th Baronet Gower of Stittenham in Yorkshire. [his sister-in-law] Harriet Elizabeth Georgiana Howard Duchess Sutherland (age 27) by marriage Duchess Sutherland.
On 23 Jul 1833 [his son] Spencer Cavendish 8th Duke Devonshire was born to William Cavendish 7th Duke Devonshire (age 25) and [his wife] Blanche Georgiana Howard Duchess Devonshire (age 21). Coefficient of inbreeding 1.65%.
On 04 May 1834 [his grandfather] George Augustus Henry Cavendish 1st Earl Burlington (age 80) died. His grandson William Cavendish 7th Duke Devonshire (age 26) succeeded 2nd Earl Burlington.
On 16 Mar 1835 [his daughter] Louisa Caroline Cavendish was born to William Cavendish 7th Duke Devonshire (age 26) and [his wife] Blanche Georgiana Howard Duchess Devonshire (age 23). Coefficient of inbreeding 1.65%.
On 30 Nov 1836 [his son] Frederick Charles Cavendish was born to William Cavendish 7th Duke Devonshire (age 28) and [his wife] Blanche Georgiana Howard Duchess Devonshire (age 24) at Compton Place Eastbourne. Coefficient of inbreeding 1.65%.
On 28 Jan 1838 [his son] Edward Cavendish was born to William Cavendish 7th Duke Devonshire (age 29) and [his wife] Blanche Georgiana Howard Duchess Devonshire (age 26) at Marylebone. Coefficient of inbreeding 1.65%.
On 27 Apr 1840 [his wife] Blanche Georgiana Howard Duchess Devonshire (age 28) died.
In 1858 Queen Victoria of the United Kingdom (age 38) appointed five Knights of the Garter:
720th Frederick III King Prussia (age 26).
721st Arthur Wellesley 2nd Duke Wellington (age 50).
722nd William Cavendish 7th Duke Devonshire (age 49).
723rd King Pedro V of Portugal (age 20).
724th The Prince of Wales (age 16).
On 18 Jan 1858 William Cavendish 6th Duke Devonshire (age 67) died at Hardwick Hall [Map]. He was buried in the Cavendish Plot, St Peter's Church, Edensor [Map]. His first cousin once removed William Cavendish 7th Duke Devonshire (age 49) succeeded 7th Duke Devonshire, 10th Earl Devonshire, 10th Baron Cavendish Hardwick. [his former wife] Blanche Georgiana Howard Duchess Devonshire by marriage Duchess Devonshire. Baron Clifford abeyant.
On 07 Jun 1864 [his son] Frederick Charles Cavendish (age 27) and [his daughter-in-law] Lucy Caroline Lyttelton (age 22) were married. No issue. He the son of William Cavendish 7th Duke Devonshire (age 56) and [his former wife] Blanche Georgiana Howard Duchess Devonshire. They were third cousins.
On 03 Aug 1865 [his son] Edward Cavendish (age 27) and [his daughter-in-law] Emma Elizabeth Lascelles were married. He the son of William Cavendish 7th Duke Devonshire (age 57) and [his former wife] Blanche Georgiana Howard Duchess Devonshire. They were first cousins.
On 26 Sep 1865 [his son-in-law] Francis Leveson-Gower aka Egerton (age 41) and [his daughter] Louisa Caroline Cavendish (age 30) were married. She the daughter of William Cavendish 7th Duke Devonshire (age 57) and [his former wife] Blanche Georgiana Howard Duchess Devonshire. He the son of Francis Leveson Gower aka Egerton 1st Earl Ellesmere and Harriet Greville Countess Ellesmere (age 62). They were second cousin once removed.
On 21 Dec 1891 William Cavendish 7th Duke Devonshire (age 83) died. He was buried at the Cavendish Plot, St Peter's Church, Edensor [Map]. His son [his son] Spencer Cavendish 8th Duke Devonshire (age 58) succeeded 8th Duke Devonshire, 11th Earl Devonshire, 3rd Earl Burlington, 11th Baron Cavendish Hardwick.
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 England: Great x 10 Grand Son of King Henry VII of England and Ireland
Kings Scotland: Great x 23 Grand Son of King Duncan I of Scotland
Kings Franks: Great x 20 Grand Son of Louis VII King Franks
Kings France: Great x 13 Grand Son of Charles "Beloved Mad" VI King France
Great x 4 Grandfather: William Cavendish 1st Duke Devonshire 9 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: William Cavendish 2nd Duke Devonshire 10 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Mary Butler Duchess Devonshire 
10 x Great Grand Daughter of King Edward III of England
Great x 2 Grandfather: William Cavendish 3rd Duke Devonshire 10 x Great Grand Son of King Henry IV of England
Great x 4 Grandfather: William Russell 
10 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Rachel Russell Duchess Devonshire 9 x Great Grand Daughter of King Henry IV of England
Great x 4 Grandmother: Rachel Wriothesley 
8 x Great Grand Daughter of King Henry IV of England
Great x 1 Grandfather: William Cavendish 4th Duke Devonshire 11 x Great Grand Son 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 Hoskyns Duchess Devonshire
GrandFather: George Augustus Henry Cavendish 1st Earl Burlington 8 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandfather: Charles Boyle 3rd Baron Clifford 
9 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Charles Boyle 2nd Earl Burlington 5 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandmother: Jane Seymour Baroness Clifford 
4 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 2 Grandfather: Richard Boyle 3rd Earl Burlington 6 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandfather: Henry Noel 
Great x 3 Grandmother: Juliana Noel Countess Burlington
Great x 1 Grandmother: Charlotte Elizabeth Boyle Marchioness Hartington 7 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandfather: George Savile 1st Marquess Halifax 
9 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: William Savile 2nd Marquess Halifax 10 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Dorothy Spencer Lady Savile 
9 x Great Grand Daughter of King Edward III of England
Great x 2 Grandmother: Dorothy Savile Countess Burlington 11 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Daniel Finch 2nd Earl Nottingham 7th Earl Winchilsea 
10 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Mary Finch Duchess Roxburghe 10 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Essex Rich 2nd Countess Nottingham 
9 x Great Grand Daughter of King Edward III of England
Father: William Cavendish 9 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandfather: James Compton 3rd Earl of Northampton 8 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: George Compton 4th Earl of Northampton 9 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Mary Noel Countess Northampton
Great x 2 Grandfather: Charles Compton 10 x Great Grand Son 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 Grand Son 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 Grand Son of King Edward III of England
Great x 4 Grandmother: Theophila Berkeley 
8 x Great Grand Daughter of King Edward III of England
Great x 2 Grandmother: Mary Lucy 10 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Charles Cotton
Great x 3 Grandmother: Catherine Cotton 9 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Isabella Hutchinson 8 x Great Grand Daughter of King Edward III of England
GrandMother: Elizabeth Compton Countess Burlington 12 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Charles Somerset Marquess Worcester 
10 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Henry Somerset 2nd Duke Beaufort 11 x Great Grand Son 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 Grand Son of King Henry IV of England
Great x 4 Grandfather: Wriothesley Baptist Noel 2nd Earl Gainsborough 9 x Great Grand Son of King Henry IV of England
Great x 3 Grandmother: Rachel Noel Duchess Beaufort 10 x Great Grand Daughter of King Henry IV of England
Great x 4 Grandmother: Catherine Greville Duchess Buckingham and Normandby 10 x Great Grand Daughter of King Edward III of England
Great x 1 Grandmother: Anne Somerset Countess Northampton 12 x Great Grand Daughter of King Henry IV of England
Great x 4 Grandfather: Richard Berkeley 11 x Great Grand Son of King Edward I of England
Great x 3 Grandfather: John Symes Berkeley 12 x Great Grand Son of King Edward I of England
Great x 2 Grandmother: Elizabeth Berekeley Duchess Beaufort 13 x Great Grand Daughter of King Edward I of England
Great x 3 Grandmother: Elizabeth Norborne
William Cavendish 7th Duke Devonshire 10 x Great Grand Son of King Henry VII of England and Ireland
Mother: Louisa Ocallaghan