Before 01 Mar 1709 [his father] Henry Bentinck 1st Duke Portland 1682-1726 (age 26) and [his mother] Elizabeth Noel Duchess Portland 1688-1737 (age 21) were married. She the daughter of Wriothesley Baptist Noel 2nd Earl Gainsborough 1661-1690 and Catherine Greville Duchess Buckingham and Normandby. He the son of William Bentinck 1st Earl of Portland (age 59) and Anne Villiers Countess Portland 1651-1688.
On 01 Mar 1709 William Bentinck 2nd Duke Portland was born to Henry Bentinck 1st Duke Portland 1682-1726 (age 26) and Elizabeth Noel Duchess Portland 1688-1737 (age 21).
On 23 Nov 1709 [his grandfather] William Bentinck 1st Earl of Portland (age 60) died. His son [his father] Henry Bentinck 1st Duke Portland 1682-1726 (age 27) succeeded 2nd Earl of Portland.
In 1716 [his father] Henry Bentinck 1st Duke Portland 1682-1726 (age 33) was created 1st Duke Portland. [his mother] Elizabeth Noel Duchess Portland 1688-1737 (age 28) by marriage Duchess Portland.
On 04 Jul 1726 [his father] Henry Bentinck 1st Duke Portland 1682-1726 (age 44) died in Spanish Town Jamaica. His body was returned to England. On 03 Nov 1726 he was buried in the Duke of Ormonde Vault, King Henry VII Chapel, Westminster Abbey. His son William Bentinck 2nd Duke Portland (age 17) succeeded 2nd Duke Portland, 3rd Earl of Portland.
On 11 Jun 1734 William Bentinck 2nd Duke Portland (age 25) and Margaret Cavendish Harley 2nd Duchess Portland 1715-1785 (age 19) were married at St Peter aka Oxford Chapel Vere Street Marylebone [Map]. She by marriage Duchess Portland. She the daughter of Edward Harley 2nd Earl of Oxford and Earl Mortimer (age 45) and Henrietta Cavendish Holles Countess of Oxford and Mortimer 1694-1755 (age 40). He the son of Henry Bentinck 1st Duke Portland 1682-1726 and Elizabeth Noel Duchess Portland 1688-1737 (age 46).
On 27 Jun 1735 [his daughter] Elizabeth Bentinck Marchioness Bath 1735-1825 was born to William Bentinck 2nd Duke Portland (age 26) and [his wife] Margaret Cavendish Harley 2nd Duchess Portland 1715-1785 (age 20) at Welbeck Abbey [Map].
On 08 Feb 1737 [his daughter] Henrietta Bentinck Countess Stamford and Warrington 1737-1827 was born to William Bentinck 2nd Duke Portland (age 27) and [his wife] Margaret Cavendish Harley 2nd Duchess Portland 1715-1785 (age 21) at Welbeck Abbey [Map].
On 19 Mar 1737 [his mother] Elizabeth Noel Duchess Portland 1688-1737 (age 49) died.
On 14 Apr 1738 [his son] William Cavendish-Bentinck 3rd Duke Portland was born to William Bentinck 2nd Duke Portland (age 29) and [his wife] Margaret Cavendish Harley 2nd Duchess Portland 1715-1785 (age 23) at Welbeck Abbey [Map].
On 26 Jul 1739 [his daughter] Margaret Cavendish-Bentinck was born to William Bentinck 2nd Duke Portland (age 30) and [his wife] Margaret Cavendish Harley 2nd Duchess Portland 1715-1785 (age 24) at Welbeck Abbey [Map].
In 1741 King George II of Great Britain and Ireland (age 57) created new Garter Knights as follows:
554th Frederick Hesse-Kassel (age 20). Probably as a consequence of his having married the daughter of King George II (age 57).
555th Charles Beauclerk 2nd Duke St Albans (age 44),
556th Charles Spencer 3rd Duke Marlborough (age 34),
557th Evelyn Pierrepont 2nd Duke Kingston upon Hull (age 30),
558th William Bentinck 2nd Duke Portland (age 31),
559th Duke Frederick III of Saxe Coburg Altenburg III 1699-1772 (age 41).
On 09 Apr 1741 [his daughter] Frances Cavendish-Bentinck was born to William Bentinck 2nd Duke Portland (age 32) and [his wife] Margaret Cavendish Harley 2nd Duchess Portland 1715-1785 (age 26) at Welbeck Abbey [Map].
In Mar 1743 [his daughter] Frances Cavendish-Bentinck (age 1) died.
On 03 Mar 1744 [his son] Edward Charles Cavendish-Bentinck was born to William Bentinck 2nd Duke Portland (age 35) and [his wife] Margaret Cavendish Harley 2nd Duchess Portland 1715-1785 (age 29) at Welbeck Abbey [Map].
On 28 Apr 1756 [his daughter] Margaret Cavendish-Bentinck (age 16) died.
In 1759 [his son-in-law] Thomas Thynne 1st Marquess of Bath (age 24) and [his daughter] Elizabeth Bentinck Marchioness Bath 1735-1825 (age 23) were married. She by marriage Viscountess Weymouth. She the daughter of William Bentinck 2nd Duke Portland 1709-1762 (age 49) and Margaret Cavendish Harley 2nd Duchess Portland 1715-1785 (age 43). They were third cousins.
On 01 May 1762 William Bentinck 2nd Duke Portland (age 53) died. His son [his son] William Cavendish-Bentinck 3rd Duke Portland (age 24) succeeded 3rd Duke Portland, 4th Earl of Portland.
On 17 Jul 1785 [his former wife] Margaret Cavendish Harley 2nd Duchess Portland 1715-1785 (age 70) died.
Paternal Family Tree: Bentinck
Maternal Family Tree: Alice Sleigh 1617-1694
Kings Wessex: Great x 21 Grand Son of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 18 Grand Son of Owain "Great" King Gwynedd 1100-1170
Kings Seisyllwg: Great x 23 Grand Son of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 19 Grand Son of Maredudd ap Bleddyn King Powys 1047-1132
Kings England: Great x 11 Grand Son of Henry IV King England
Kings Scotland: Great x 16 Grand Son of William "Lion" I King Scotland
Kings Franks: Great x 17 Grand Son of Louis VII King Franks
Kings France: Great x 14 Grand Son of Philip "Bold" III King France
GrandFather: William Bentinck 1st Earl of Portland
Father: Henry Bentinck 1st Duke Portland 1682-1726 11 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: William Villiers of Brooksby Leicestershire
Great x 3 Grandfather: George Villiers of Brokesby
Great x 4 Grandmother: Collette Clarke
Great x 2 Grandfather: Edward Villiers
Great x 4 Grandfather: William Saunders of Harrington Northamptonshire
Great x 3 Grandmother: Audrey Saunders
Great x 1 Grandfather: Edward Villiers 9 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Nicholas St John
6 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: John St John 7 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Elizabeth Blount
13 x Great Grand Daughter of King Henry I "Beauclerc" England
Great x 2 Grandmother: Barbara St John 8 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Walter Hungerford
10 x Great Grand Son of King Henry III of England
Great x 3 Grandmother: Lucy Hungerford 11 x Great Grand Daughter of King Henry III of England
Great x 4 Grandmother: Anne Dormer
GrandMother: Anne Villiers Countess Portland 1651-1688 10 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Thomas Howard 4th Duke of Norfolk
7 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Thomas Howard 1st Earl Suffolk 7 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Margaret Audley Duchess Norfolk
6 x Great Grand Daughter of King Edward III of England
Great x 2 Grandfather: Theophilus Howard 2nd Earl Suffolk 8 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Henry Knyvet
8 x Great Grand Son of King Edward "Longshanks" I of England
Great x 3 Grandmother: Catherine Knyvet Countess Suffolk 9 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandmother: Elizabeth Stumpe
Great x 1 Grandmother: Frances Howard 9 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Alexander Manderston Home
Great x 3 Grandfather: George Home 1st Earl Dunbar
Great x 2 Grandmother: Elizabeth Home Countess Suffolk 1599-1633 18 x Great Grand Daughter of King Henry I "Beauclerc" England
Great x 4 Grandfather: Alexander Gordon 3rd of Gight 16 x Great Grand Son of King Henry I "Beauclerc" England
Great x 3 Grandmother: Elizabeth Gordon Countess Dunbar 1575-1645 17 x Great Grand Daughter of King Henry I "Beauclerc" England
Great x 4 Grandmother: Agnes Beaton
William Bentinck 2nd Duke Portland 1709-1762 11 x Great Grand Son of Henry IV King England
Great x 4 Grandfather: Andrew Noel
Great x 3 Grandfather: Edward Noel 2nd Viscount Campden
Great x 4 Grandmother: Mabel Harrington
Great x 2 Grandfather: Baptist Noel 3rd Viscount Campden
Great x 4 Grandfather: Baptist Hicks 1st Viscount Campden
Great x 3 Grandmother: Juliana Hicks Viscountess Campden
Great x 4 Grandmother: Elizabeth May Viscountess Campden
Great x 1 Grandfather: Edward Noel 1st Earl Gainsborough
Great x 4 Grandfather: Edward Wotton 1st Baron Wotton
Great x 3 Grandfather: Thomas Wotton 2nd Baron Wotton
Great x 2 Grandmother: Hester Wotton Viscountess Campden
GrandFather: Wriothesley Baptist Noel 2nd Earl Gainsborough 1661-1690 9 x Great Grand Son of Henry IV King England
Great x 4 Grandfather: Henry Wriothesley 2nd Earl of Southampton
Great x 3 Grandfather: Henry Wriothesley 3rd Earl of Southampton 7 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Mary Browne Countess Southampton
6 x Great Grand Daughter of King Edward III of England
Great x 2 Grandfather: Thomas Wriothesley 4th Earl of Southampton 2nd Earl Chichester 7 x Great Grand Son of Henry IV King England
Great x 4 Grandfather: John Vernon
5 x Great Grand Son of Henry IV King England
Great x 3 Grandmother: Elizabeth Vernon Countess Southampton 1572-1655 6 x Great Grand Daughter of Henry IV King England
Great x 1 Grandmother: Elizabeth Wriothesley Countess Gainsborough 8 x Great Grand Daughter of Henry IV King England
Great x 4 Grandfather: Francis Leigh
Great x 3 Grandfather: Francis Leigh 1st Earl Chichester
Great x 4 Grandmother: Mary Egerton
Great x 2 Grandmother: Elizabeth Leigh Countess Southampton 1620-1655 13 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandfather: John Boteler 1st Baron Boteler 11 x Great Grand Son of King Edward "Longshanks" I of England
Great x 3 Grandmother: Audrey Boteler Countess Chichester 12 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandmother: Elizabeth Villiers Baroness Boteler Brantfield
Mother: Elizabeth Noel Duchess Portland 1688-1737 10 x Great Grand Daughter of Henry IV King England
Great x 4 Grandfather: Robert Greville 6 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Fulk Greville 7 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Blanche Whitney
Great x 2 Grandfather: Robert Greville 2nd Baron Brooke 8 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Mary Copley
Great x 1 Grandfather: Fulke Greville 5th Baron Brooke 9 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: William Russell 1st Baron Russell
9 x Great Grand Son of King John "Lackland" of England
Great x 3 Grandfather: Francis Russell 4th Earl Bedford 10 x Great Grand Son of King John "Lackland" of England
Great x 4 Grandmother: Elizabeth Long Baroness Russel Thornhaugh
Great x 2 Grandmother: Catherine Russell Baroness Brooke 9 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Giles Brydges 3rd Baron Chandos 7 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Catherine Brydges Countess Bedford 8 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Anne Clinton
9 x Great Grand Daughter of King Edward "Longshanks" I of England
GrandMother: Catherine Greville Duchess Buckingham and Normandby 10 x Great Grand Daughter of King Edward III of England
Great x 3 Grandfather: Samuel Dashwood
Great x 2 Grandfather: Francis Dashwood
Great x 1 Grandmother: Sarah Dashwood Baroness Brooke
Great x 3 Grandfather: Richard Sleigh
Great x 2 Grandmother: Alice Sleigh