On 25 Apr 1682 [her father] Peregrine Osborne 2nd Duke Leeds (age 23) and [her mother] (age 20) were married. He the son of Thomas Osborne 1st Duke Leeds (age 50) and Bridget Bertie Duchess Leeds 1629-1704 (age 53).
On 14 Aug 1688 Mary Osborne Duchess Beaufort was born to Peregrine Osborne 2nd Duke Leeds (age 29) and (age 26).
On 21 Jan 1700 Henry Somerset 1st Duke Beaufort (age 71) died at Badminton, Gloucestershire. He was buried at Beaufort Chapel, St George's Chapel, Windsor Castle [Map]. His grandson [her future husband] Henry Somerset 2nd Duke Beaufort (age 15) succeeded 2nd Duke Beaufort, 4th Marquess Worcester, 8th Earl Worcester.
On 07 Jul 1702 [her future husband] Henry Somerset 2nd Duke Beaufort (age 18) and Mary Sackville 2nd Duchess Beaufort 1689-1705 (age 13) were married. She by marriage Duchess Beaufort. She the daughter of Charles Sackville 6th Earl Dorset 1st Earl Middlesex (age 59) and Mary Compton Countess Dorset and Middlesex 1669-1691. They were fourth cousins.
On 26 Feb 1706 [her future husband] Henry Somerset 2nd Duke Beaufort (age 21) and Rachel Noel Duchess Beaufort 1687-1709 (age 19) were married. She by marriage Duchess Beaufort. She the daughter of Wriothesley Baptist Noel 2nd Earl Gainsborough 1661-1690 and Catherine Greville Duchess Buckingham and Normandby. They were fourth cousins.
On 14 Sep 1711 Henry Somerset 2nd Duke Beaufort (age 27) and Mary Osborne Duchess Beaufort (age 23) were married. She by marriage Duchess Beaufort. She the daughter of Peregrine Osborne 2nd Duke Leeds (age 52) and (age 49).
On 26 Jul 1712 [her grandfather] Thomas Osborne 1st Duke Leeds (age 80) died. His son [her father] Peregrine Osborne 2nd Duke Leeds (age 53) succeeded 2nd Duke Leeds, 2nd Earl of Danby, 2nd Viscount Osborne, 2nd Viscount Latimer, 2nd Baron Osborne of Kinderton, 3rd Baronet Osborne of Kiveton. [her mother] (age 50) by marriage Duchess Leeds.
On 24 Apr 1714 [her husband] Henry Somerset 2nd Duke Beaufort (age 30) died. He was buried at St Michael and all Angels Church, Badminton. His son [her step-son] Henry Somerset 3rd Duke Beaufort 1707-1745 (age 7) succeeded 3rd Duke Beaufort, 5th Marquess Worcester, 9th Earl Worcester.
In 1722 Mary Osborne Duchess Beaufort (age 33) died.
Paternal Family Tree: Osborne
Kings Wessex: Great x 20 Grand Daughter of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 18 Grand Daughter of Owain "Great" King Gwynedd 1100-1170
Kings Seisyllwg: Great x 22 Grand Daughter of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 19 Grand Daughter of Maredudd ap Bleddyn King Powys 1047-1132
Kings England: Great x 11 Grand Daughter of King Edward III of England
Kings Scotland: Great x 15 Grand Daughter of William "Lion" I King Scotland
Kings Franks: Great x 16 Grand Daughter of Louis VII King Franks
Kings France: Great x 13 Grand Daughter of Philip "The Fair" IV King France
Great x 3 Grandfather: Edward Osborne
Great x 2 Grandfather: Hewett Osborne
Great x 4 Grandfather: William Hewett
Great x 3 Grandmother: Anne Hewett
Great x 1 Grandfather: Edward Osborne 1st Baronet
Great x 3 Grandfather: Thomas Fleetwood
Great x 2 Grandmother: Joyce Fleetwood
Great x 4 Grandfather: John Spring
Great x 3 Grandmother: Bridget Spring
Great x 4 Grandmother: Dorothy Waldegrave
GrandFather: Thomas Osborne 1st Duke Leeds 9 x Great Grand Son of King Edward III of England
Great x 2 Grandfather: Thomas Walmesley
Great x 1 Grandmother: Anne Walmesley Lady Osborne 8 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Sylvester Danvers
Great x 3 Grandfather: John Danvers
Great x 4 Grandmother: Elizabeth Mordaunt
Great x 2 Grandmother: Eleanor Danvers 7 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: John Neville 4th Baron Latimer of Snape 5 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Elizabeth Neville 6 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Lucy Somerset Baroness Latimer Snape 5 x Great Grand Daughter of King Edward III of England
Father: Peregrine Osborne 2nd Duke Leeds 10 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Richard Bertie Baron Willoughby
Great x 3 Grandfather: Peregrine Bertie 13th Baron Willoughby 9 x Great Grand Son of King Henry III of England
Great x 4 Grandmother: Catherine Willoughby Duchess Suffolk
8 x Great Grand Daughter of King Henry III of England
Great x 2 Grandfather: Robert Bertie 1st Earl Lindsey 8 x Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandfather: John de Vere 16th Earl of Oxford
6 x Great Grand Son of King Edward "Longshanks" I of England
Great x 3 Grandmother: Mary Vere Baroness Willoughby Eresby 7 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 1 Grandfather: Montagu Bertie 2nd Earl Lindsey 9 x Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandfather: Edward Montagu
8 x Great Grand Son of King Edward "Longshanks" I of England
Great x 3 Grandfather: Edward Montagu 1st Baron Montagu 9 x Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandmother: Elizabeth Harrington
Great x 2 Grandmother: Elizabeth Montagu Countess Lindsey -1654 10 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandfather: John Jeffrey of Chiddington Sussex
Great x 3 Grandmother: Elizabeth Jeffrey
GrandMother: Bridget Bertie Duchess Leeds 1629-1704 10 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandfather: Roger Cockayne
Great x 3 Grandfather: William Cockayne
Great x 2 Grandfather: William Cockayne
Great x 4 Grandfather: Roger Medcalf
Great x 3 Grandmother: Elizabeth Medcalf
Great x 1 Grandmother: Martha Cockayne Countess Lindsey and Holderness 1605-1641
Mary Osborne Duchess Beaufort 1688-1722 11 x Great Grand Daughter of King Edward III of England