On 13 Feb 1884 [his father] George Godolphin Osborne 10th Duke Leeds (age 21) and [his mother] Katherine Frances Lambton Duchess Leeds 1862-1952 (age 21) were married. She the daughter of George Frederick D'Arcy Lambton 2nd Earl Durham 1828-1879 and Beatrix Frances Hamilton Countess Durham 1835-1871. He the son of George Godolphin Osborne 9th Duke Leeds 1828-1895 (age 55) and Fanny Georgiana Pitt-Rivers Duchess Leeds 1836-1896 (age 47). She a great x 5 granddaughter of King Charles II of England Scotland and Ireland. 
On 23 Dec 1895 [his grandfather] George Godolphin Osborne 9th Duke Leeds 1828-1895 (age 67) died at Hornby Castle [Map]. His son [his father] George Godolphin Osborne 10th Duke Leeds (age 33) succeeded 10th Duke Leeds, 10th Earl of Danby, 10th Viscount Osborne, 10th Viscount Latimer, 10th Baron Osborne of Kinderton, 11th Baronet Osborne of Kiveton, 4th Baron Godolphin of Farnham Royal in Buckinghamshire. [his mother] Katherine Frances Lambton Duchess Leeds 1862-1952 (age 33) by marriage Duchess Leeds.
On 12 Mar 1901 John Francis Godolphin Osborne 11th Duke Leeds was born to George Godolphin Osborne 10th Duke Leeds (age 38) and Katherine Frances Lambton Duchess Leeds 1862-1952 (age 38).
On 10 May 1927 [his father] George Godolphin Osborne 10th Duke Leeds (age 64) died. His son John Francis Godolphin Osborne 11th Duke Leeds (age 26) succeeded 11th Duke Leeds, 11th Earl of Danby, 11th Viscount Osborne, 11th Viscount Latimer, 11th Baron Osborne of Kinderton, 12th Baronet Osborne of Kiveton, 15th Baron Conyers, 5th Baron Godolphin of Farnham Royal in Buckinghamshire.
On 06 Dec 1952 [his mother] Katherine Frances Lambton Duchess Leeds 1862-1952 (age 90) died.
On 26 Jul 1963 John Francis Godolphin Osborne 11th Duke Leeds (age 62) died without male issue. His second cousin once removed Francis D'Arcy Godolphin Osborne 12th Duke of Leeds 1884-1964 (age 78) succeeded 12th Duke Leeds, 12th Earl of Danby, 12th Viscount Osborne, 12th Viscount Latimer, 12th Baron Osborne of Kinderton, 13th Baronet Osborne of Kiveton, 6th Baron Godolphin of Farnham Royal in Buckinghamshire.
Paternal Family Tree: Osborne
Maternal Family Tree: Jane Maxwell Duchess Gordon 1748-1812
Descendants Family Trees:
Kings Wessex: Great x 25 Grand Son of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 22 Grand Son of Owain "Great" King Gwynedd 1100-1170
Kings Seisyllwg: Great x 28 Grand Son of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 23 Grand Son of Maredudd ap Bleddyn King Powys 1047-1132
Kings England: Great x 6 Grand Son of King Charles II of England Scotland and Ireland
Kings Scotland: Great x 18 Grand Son of Robert "The Bruce" I King Scotland
Kings Franks: Great x 21 Grand Son of Louis VII King Franks
Kings France: Great x 8 Grand Son of Henry IV King France
Great x 4 Grandfather: Thomas Osborne 4th Duke Leeds 12 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Francis Osborne 5th Duke Leeds 11 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Mary Godolphin Duchess Leeds -1764
10 x Great Grand Daughter of King Edward III of England
Great x 2 Grandfather: Francis Osborne 1st Baron Godolphin 5 x Great Grand Son of King James I of England and Ireland and VI of Scotland
Great x 4 Grandfather: Robert Darcy 4th Earl Holderness 1718-1778
3 x Great Grand Son of King James I of England and Ireland and VI of Scotland
Great x 3 Grandmother: Amelia Darcy 12th Baroness Darcy 9th Baroness Conyers 4 x Great Grand Daughter of King James I of England and Ireland and VI of Scotland
Great x 1 Grandfather: George Godolphin Osborne 8th Duke Leeds 6 x Great Grand Son of King James I of England and Ireland and VI of Scotland
Great x 4 Grandfather: Robert Eden 3rd Baronet
Great x 3 Grandfather: William Eden 1st Baron Auckland
Great x 2 Grandmother: Elizabeth Charlotte Eden Baroness Godolphin
Great x 4 Grandfather: Gilbert Elliot 3rd Baronet
Great x 3 Grandmother: Eleanor Elliot
GrandFather: George Godolphin Osborne 9th Duke Leeds 1828-1895 7 x Great Grand Son of King James I of England and Ireland and VI of Scotland
Great x 4 Grandfather: John Leveson-Gower 1st Earl Gower 10 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Granville Leveson-Gower 1st Marquess Stafford 10 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Evelyn Pierrepont Baroness Gower
9 x Great Grand Daughter of King Edward III of England
Great x 2 Grandfather: Granville Leveson-Gower 1st Earl Granville 11 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Alexander Stewart 6th Earl Galloway
11 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Susanna Stewart Marchioness Stafford -1805 12 x Great Grand Daughter of King Edward III of England
Great x 1 Grandmother: Harriet Emma Arundel Stewart Duchess Leeds 11 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandfather: John Spencer
11 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: John Spencer 1st Earl Spencer 9 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandmother: Georgiana Caroline Carteret 1716-1780
8 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 2 Grandmother: Henrietta Frances Spencer Countess Bessborough 1761-1821 10 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandfather: Stephen Poyntz
13 x Great Grand Son of King Henry III of England
Great x 3 Grandmother: Margaret Georgiana Poyntz Countess Spencer 11 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Anna Maria Mordaunt
10 x Great Grand Daughter of King Edward III of England
Father: George Godolphin Osborne 10th Duke Leeds 8 x Great Grand Son of King James I of England and Ireland and VI of Scotland
Great x 4 Grandfather: Julines Beckford
Great x 3 Grandfather: Peter Beckford
Great x 2 Grandfather: Horace Beckford aka Pitt-Rivers 3rd Baron Rivers 14 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: George Pitt 1st Baron Rivers 12 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Louisa Pitt 13 x Great Grand Daughter of King Edward III of England
Great x 1 Grandfather: George Pitt-Rivers 4th Baron Rivers 15 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Francis Hale Rigby
Great x 2 Grandmother: Frances Rigby
GrandMother: Fanny Georgiana Pitt-Rivers Duchess Leeds 1836-1896 11 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandfather: John Leveson-Gower 1st Earl Gower 10 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Granville Leveson-Gower 1st Marquess Stafford 10 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Evelyn Pierrepont Baroness Gower 9 x Great Grand Daughter of King Edward III of England
Great x 2 Grandfather: Granville Leveson-Gower 1st Earl Granville 11 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Alexander Stewart 6th Earl Galloway 11 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Susanna Stewart Marchioness Stafford -1805 12 x Great Grand Daughter of King Edward III of England
Great x 1 Grandmother: Susan Georgiana Leveson-Gower Baroness Rivers 10 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandfather: William Cavendish 4th Duke Devonshire
11 x Great Grand Son of Henry IV King England
Great x 3 Grandfather: William Cavendish 5th Duke Devonshire 8 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandmother: Charlotte Elizabeth Boyle Marchioness Hartington
7 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 2 Grandmother: Harriet Cavendish Countess Granville 9 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandfather: John Spencer 1st Earl Spencer 9 x Great Grand Son of King Henry VII of England and Ireland
Great x 3 Grandmother: Georgiana Spencer Duchess Devonshire 10 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandmother: Margaret Georgiana Poyntz Countess Spencer 11 x Great Grand Daughter of King Edward III of England
John Francis Godolphin Osborne 11th Duke Leeds 1901-1963 6 x Great Grand Son of King Charles II of England Scotland and Ireland
Great x 2 Grandfather: William Henry Lambton
Great x 1 Grandfather: John "Radical Jack" Lambton 1st Earl Durham 10 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandfather: William Villiers 3rd Earl Jersey 1707-1769
12 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: George Bussy Villiers 4th Earl Jersey 8 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandmother: Anne Egerton Duchess Bedford -1762
7 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 2 Grandmother: Anne Barbara Frances Villiers 9 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandfather: Philip Twysden Bishop Raphoe
Great x 3 Grandmother: Frances Twysden
GrandFather: George Frederick D'Arcy Lambton 2nd Earl Durham 1828-1879 11 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandfather: Henry Grey 1st Baronet
12 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Charles Grey 1st Earl Grey 13 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Hannah Wood
Great x 2 Grandfather: Charles Grey 2nd Earl Grey 13 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: George Grey
Great x 3 Grandmother: 12 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Elizabeth Ogle 11 x Great Grand Daughter of King Edward III of England
Great x 1 Grandmother: Louisa Elizabeth Grey Countess Durham 1797-1841 14 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: John Ponsonby
12 x Great Grand Son of King Edward "Longshanks" I of England
Great x 3 Grandfather: William Ponsonby 1st Baron Ponsonby of Imokilly in County Cork 12 x Great Grand Son of Henry IV King England
Great x 4 Grandmother: Elizabeth Cavendish 11 x Great Grand Daughter of Henry IV King England
Great x 2 Grandmother: Mary Elizabeth Ponsonby Countess Grey 1776-1861 13 x Great Grand Daughter of Henry IV King England
Mother: Katherine Frances Lambton Duchess Leeds 1862-1952 5 x Great Grand Daughter of King Charles II of England Scotland and Ireland
Great x 4 Grandfather: John Hamilton 12 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: John Hamilton 1st Marquess Abercorn 13 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Harriot Craggs
Great x 2 Grandfather: James Hamilton 14 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Joseph Moyle aka Copley 1st Baronet 15 x Great Grand Son of King John "Lackland" of England
Great x 3 Grandmother: Catherine Moyle Marchioness Abercorn 16 x Great Grand Daughter of King John "Lackland" of England
Great x 1 Grandfather: James Hamilton 1st Duke Abercorn 1811-1885 14 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: James Douglas 14th Earl Morton 11 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: John Douglas 12 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Bridget Heathcote Countess Morton -1805
Great x 2 Grandmother: Harriet Douglas Countess Aberdeen 1792-1833 13 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Edward Lascelles 1st Earl Harewood
Great x 3 Grandmother: Frances Lascelles
Great x 4 Grandmother: Anne Chaloner Baroness Harewood
GrandMother: Beatrix Frances Hamilton Countess Durham 1835-1871 4 x Great Grand Daughter of King Charles II of England Scotland and Ireland
Great x 4 Grandfather: John Russell 4th Duke Bedford
10 x Great Grand Son of Henry IV King England
Great x 3 Grandfather: Francis Russell 11 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Gertrude Leveson-Gower Duchess Bedford -1794 10 x Great Grand Daughter of King Edward III of England
Great x 2 Grandfather: John Russell 6th Duke Bedford 2 x Great Grand Son of King Charles II of England Scotland and Ireland
Great x 4 Grandfather: William Anne Keppel 2nd Earl Albermarle
Great x 3 Grandmother: Elizabeth Keppel Great Grand Daughter of King Charles II of England Scotland and Ireland
Great x 4 Grandmother: Anne Lennox Countess Albermarle 1703-1789
Grand Daughter of King Charles II of England Scotland and Ireland
Great x 1 Grandmother: Louisa Jane Russell Duchess Abercorn 1812-1905 3 x Great Grand Daughter of King Charles II of England Scotland and Ireland
Great x 4 Grandfather: Cosmo George Gordon 3rd Duke Gordon 1720-1752 11 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Alexander Gordon 4th Duke Gordon 8 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandmother: Catherine Gordon Duchess Gordon 1718-1799 7 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 2 Grandmother: Georgiana Gordon Duchess Bedford 1781-1853 9 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandfather: William Maxwell
Great x 3 Grandmother: Jane Maxwell Duchess Gordon