On 09 Nov 1707 John Fitzgerald 18th Earl of Kildare (age 46) died. His first cousin [his father] Robert Fitzgerald 19th Earl of Kildare 1675-1743 (age 32) succeeded 19th Earl Kildare.
On 07 Mar 1709 [his father] Robert Fitzgerald 19th Earl of Kildare 1675-1743 (age 33) and [his mother] Mary O'Brien Countess Kildare -1730 were married. She by marriage Countess Kildare. She the daughter of William O'Brien 3rd Earl Inchiquin 1662-1719 (age 47) and Mary Villiers Countess Inchiquin -1753. They were second cousin once removed.
In 1722 James Fitzgerald 1st Duke Leinster was born to Robert Fitzgerald 19th Earl of Kildare 1675-1743 (age 46) and Mary O'Brien Countess Kildare -1730.
In 1730 [his mother] Mary O'Brien Countess Kildare -1730 died.
On 20 Feb 1743 [his father] Robert Fitzgerald 19th Earl of Kildare 1675-1743 (age 67) died. His son James Fitzgerald 1st Duke Leinster (age 21) succeeded 20th Earl Kildare.
In 1744 Henry Fox 1st Baron Holland (age 38) and [his future sister-in-law] Caroline Lennox 1st Baroness Holland (age 20) were married. She the daughter of Charles Lennox 2nd Duke Richmond (age 42) and Sarah Cadogan Duchess Richmond 1705-1751 (age 38). She a great granddaughter of King Charles II of England Scotland and Ireland. 
On 07 Feb 1747 James Fitzgerald 1st Duke Leinster (age 25) and Emilia Mary Lennox Duchess Leinster 1731-1814 (age 15) were married. She the daughter of Charles Lennox 2nd Duke Richmond (age 45) and Sarah Cadogan Duchess Richmond 1705-1751 (age 41). He the son of Robert Fitzgerald 19th Earl of Kildare 1675-1743 and Mary O'Brien Countess Kildare -1730. She a great granddaughter of King Charles II of England Scotland and Ireland.
On 15 Jan 1748 [his son] George Fitzgerald was born to James Fitzgerald 1st Duke Leinster (age 26) and [his wife] Emilia Mary Lennox Duchess Leinster 1731-1814 (age 16). He a great x 2 grandson of King Charles II of England Scotland and Ireland.
On 12 Mar 1749 or 13 Mar 1749 [his son] William Robert Fitzgerald 2nd Duke Leinster 1749-1804 was born to James Fitzgerald 1st Duke Leinster (age 27) and [his wife] Emilia Mary Lennox Duchess Leinster 1731-1814 (age 17) at Arlington Place. He a great x 2 grandson of King Charles II of England Scotland and Ireland.
In 1750 [his daughter] Caroline Fitzgerald was born to James Fitzgerald 1st Duke Leinster (age 28) and [his wife] Emilia Mary Lennox Duchess Leinster 1731-1814 (age 18). She a great x 2 granddaughter of King Charles II of England Scotland and Ireland.
On 15 Mar 1751 [his daughter] Emily Mary Fitzgerald was born to James Fitzgerald 1st Duke Leinster (age 29) and [his wife] Emilia Mary Lennox Duchess Leinster 1731-1814 (age 19). She a great x 2 granddaughter of King Charles II of England Scotland and Ireland.
In 1753 [his daughter] Henrietta Fitzgerald was born to James Fitzgerald 1st Duke Leinster (age 31) and [his wife] Emilia Mary Lennox Duchess Leinster 1731-1814 (age 21). She a great x 2 granddaughter of King Charles II of England Scotland and Ireland.
In 1754 [his daughter] Caroline Fitzgerald (age 4) died.
In 1755 [his daughter] Caroline Fitzgerald died.
In 1755 [his daughter] Caroline Fitzgerald was born to James Fitzgerald 1st Duke Leinster (age 33) and [his wife] Emilia Mary Lennox Duchess Leinster 1731-1814 (age 23). She a great x 2 granddaughter of King Charles II of England Scotland and Ireland.
On 30 Jun 1756 [his son] Charles Fitzgerald 1st Baron Lecale was born to James Fitzgerald 1st Duke Leinster (age 34) and [his wife] Emilia Mary Lennox Duchess Leinster 1731-1814 (age 24). He a great x 2 grandson of King Charles II of England Scotland and Ireland.
In 1758 Thomas Conolly (age 20) and [his sister-in-law] Louisa Augusta Lennox (age 14) were married. She the daughter of Charles Lennox 2nd Duke Richmond and Sarah Cadogan Duchess Richmond 1705-1751. She a great granddaughter of King Charles II of England Scotland and Ireland.
On 29 May 1758 [his daughter] Charlotte Fitzgerald 1st Baroness Rayleigh was born to James Fitzgerald 1st Duke Leinster (age 36) and [his wife] Emilia Mary Lennox Duchess Leinster 1731-1814 (age 26). She a great x 2 granddaughter of King Charles II of England Scotland and Ireland.
On 25 Dec 1759 [his brother-in-law] George Lennox (age 22) and Louisa Kerr were married. She the daughter of William Henry Kerr 4th Marquess Lothian 1710-1775 (age 49) and Caroline Darcy Marchioness Lothian. He the son of Charles Lennox 2nd Duke Richmond and Sarah Cadogan Duchess Richmond 1705-1751. He a great grandson of King Charles II of England Scotland and Ireland. She a great x 4 granddaughter of King James I of England and Ireland and VI of Scotland. 
In 1760 [his daughter] Louisa Bridget Fitzgerald was born to James Fitzgerald 1st Duke Leinster (age 38) and [his wife] Emilia Mary Lennox Duchess Leinster 1731-1814 (age 28). She a great x 2 granddaughter of King Charles II of England Scotland and Ireland.
On 30 Jul 1761 [his son] Henry Fitzgerald was born to James Fitzgerald 1st Duke Leinster (age 39) and [his wife] Emilia Mary Lennox Duchess Leinster 1731-1814 (age 29). He a great x 2 grandson of King Charles II of England Scotland and Ireland.
In 1762 [his daughter] Sophia Sarah Mary Fitzgerald was born to James Fitzgerald 1st Duke Leinster (age 40) and [his wife] Emilia Mary Lennox Duchess Leinster 1731-1814 (age 30). She a great x 2 granddaughter of King Charles II of England Scotland and Ireland.
On 04 May 1762 King George III of Great Britain and Ireland (age 23) created a number of new peerages ...
Edward Noel 1st Viscount Wentworth (age 46) was created 1st Viscount Wentworth.
William Courtenay 7th Earl Devon (age 53) was created 1st Viscount Courtenay.
Thomas Pelham Holles 1st Duke Newcastle-under-Lyme (age 68) was created 1st Baron Pelham of Stanmer in Sussex with default to his cousin Thomas Pelham (age 34).
[his sister-in-law] Caroline Lennox 1st Baroness Holland (age 39) was created 1st Baron Holland in Lincolnshire. Henry Fox 1st Baron Holland (age 56) by marriage Baron Holland in Lincolnshire.
John Perceval 2nd Earl Egmont (age 51) was created 1st Baron Lovel and Holland of Enmore in Somerset.
John Montagu 1st Baron Montagu (age 27) was created 1st Baron Montagu of Boughton in Northamptonshire.
Joseph Damer 1st Earl Dorchester (age 44) was created 1st Baron Milton of Milton Abbey in Dorset.
Edward Hussey-Montagu 1st Earl Beaulieu (age 41) was created 1st Baron Beaulieu of Beaulieu in Hampshire with a special remainder to his heirs male with his current wife Isabella Montagu Duchess Manchester (age 56).
On 12 May 1762 George Venables-Vernon 1st Baron Vernon (age 53) was created 1st Baron Vernon of Kinderton in Cheshire. Martha Harcourt Baroness Vernon of Kinderton (age 46) by marriage Baroness Vernon of Kinderton in Cheshire.
George Fox Lane 1st Baron Bingley (age 65) was created 1st Baron Bingley. Harriet Benson Baroness Bingley (age 57) by marriage Baroness Bingley.
On 02 Jun 1762 Thomas Charles Bunbury 6th Baronet (age 22) and [his sister-in-law] Sarah Lennox Lady Bunbury (age 17) were married. The marriage was dissolved in Feb 1769 since she had had a child with William Gordon (age 18) in 1768. The decree for divorce was issued on 14 May 1776. One of her daughters with Colonel George Napier (age 11), Emily Louisa Augusta Napier Lady Bunbury, would subsequently marry Charles Bunbury's nephew and heir Henry Edward Bunbury 7th Baronet. She the daughter of Charles Lennox 2nd Duke Richmond and Sarah Cadogan Duchess Richmond 1705-1751. She a great granddaughter of King Charles II of England Scotland and Ireland.
In 1763 [his daughter] Henrietta Fitzgerald (age 10) died.
On 15 Oct 1763 [his son] Edward Fitzgerald was born to James Fitzgerald 1st Duke Leinster (age 41) and [his wife] Emilia Mary Lennox Duchess Leinster 1731-1814 (age 32). He a great x 2 grandson of King Charles II of England Scotland and Ireland.
In 1765 [his son] Robert Stephen Fitzgerald was born to James Fitzgerald 1st Duke Leinster (age 43) and [his wife] Emilia Mary Lennox Duchess Leinster 1731-1814 (age 33). He a great x 2 grandson of King Charles II of England Scotland and Ireland.
In 1765 [his daughter] Louisa Bridget Fitzgerald (age 5) died.
On 26 Sep 1765 [his son] George Fitzgerald (age 17) died.
In 1766 James Fitzgerald 1st Duke Leinster (age 44) was created 1st Duke Leinster. [his wife] Emilia Mary Lennox Duchess Leinster 1731-1814 (age 34) by marriage Duchess Leinster.
In Jan 1766 [his son] Gerald Fitzgerald was born to James Fitzgerald 1st Duke Leinster (age 44) and [his wife] Emilia Mary Lennox Duchess Leinster 1731-1814 (age 34). He a great x 2 grandson of King Charles II of England Scotland and Ireland.
In 1767 [his son] Augustus Fitzgerald was born to James Fitzgerald 1st Duke Leinster (age 45) and [his wife] Emilia Mary Lennox Duchess Leinster 1731-1814 (age 35). He a great x 2 grandson of King Charles II of England Scotland and Ireland.
On 21 Nov 1769 [his sister-in-law] Cecilia Lennox (age 19) died.
In 1770 [his daughter] Fanny Fitzgerald was born to James Fitzgerald 1st Duke Leinster (age 48) and [his wife] Emilia Mary Lennox Duchess Leinster 1731-1814 (age 38). She a great x 2 granddaughter of King Charles II of England Scotland and Ireland.
In 1771 [his daughter] Lucy Anne Fitzgerald was born to James Fitzgerald 1st Duke Leinster (age 49) and [his wife] Emilia Mary Lennox Duchess Leinster 1731-1814 (age 39). She a great x 2 granddaughter of King Charles II of England Scotland and Ireland.
In 1771 [his son] Augustus Fitzgerald (age 4) died.
In 1772 [his daughter] Louisa Fitzgerald was born to James Fitzgerald 1st Duke Leinster (age 50) and [his wife] Emilia Mary Lennox Duchess Leinster 1731-1814 (age 40). She a great x 2 granddaughter of King Charles II of England Scotland and Ireland.
On 16 Apr 1773 [his son] George Simon Son Fitzgerald was born to James Fitzgerald 1st Duke Leinster (age 51) and [his wife] Emilia Mary Lennox Duchess Leinster 1731-1814 (age 41). He a great x 2 grandson of King Charles II of England Scotland and Ireland.
On 19 Nov 1773 James Fitzgerald 1st Duke Leinster (age 51) died. His son [his son] William Robert Fitzgerald 2nd Duke Leinster 1749-1804 (age 24) succeeded 2nd Duke Leinster.
On 27 Mar 1814 [his former wife] Emilia Mary Lennox Duchess Leinster 1731-1814 (age 82) died.
[his son] Henry Fitzgerald and Charlotte Boyle 20th Baroness Ros Helmsley were married. He the son of James Fitzgerald 1st Duke Leinster 1722-1773 and Emilia Mary Lennox Duchess Leinster 1731-1814. They were third cousin once removed. He a great x 2 grandson of King Charles II of England Scotland and Ireland. 
Paternal Family Tree: Fitzgerald
Maternal Family Tree: Janet Lyle
Kings Wessex: Great x 18 Grand Son of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 15 Grand Son of Owain "Great" King Gwynedd 1100-1170
Kings Seisyllwg: Great x 19 Grand Son of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 16 Grand Son of Maredudd ap Bleddyn King Powys 1047-1132
Kings England: Great x 9 Grand Son of King Edward III of England
Kings Scotland: Great x 15 Grand Son of William "Lion" I King Scotland
Kings Franks: Great x 15 Grand Son of Louis VII King Franks
Kings France: Great x 11 Grand Son of Philip "The Fair" IV King France
Great x 4 Grandfather: Gerald Fitzgerald 8th Earl of Kildare
Great x 3 Grandfather: Gerald Fitzgerald 9th Earl of Kildare
Great x 2 Grandfather: Edward Fitzgerald 5 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Thomas Grey 1st Marquess Dorset
6 x Great Grand Son of King Edward "Longshanks" I of England
Great x 3 Grandmother: Elizabeth Grey Countess Kildare 4 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Cecily Bonville Marchioness Dorset
3 x Great Grand Daughter of King Edward III of England
Great x 1 Grandfather: George "Fairy Earl" Fitzgerald 16th Earl of Kildare 1612-1660 6 x Great Grand Son of King Edward III of England
GrandFather: Robert Fitzgerald 7 x Great Grand Son of King Edward III of England
Great x 2 Grandfather: Richard Boyle 1st Earl Cork
Great x 1 Grandmother: Joan Boyle Countess Kildare 1611-1657
Father: Robert Fitzgerald 19th Earl of Kildare 1675-1743 8 x Great Grand Son of King Edward III of England
Great x 1 Grandfather: James Clotworthy 
GrandMother: Mary Clotworthy
James Fitzgerald 1st Duke Leinster 1722-1773 9 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Dermod McMurrough O'Brien 5th Baron Inchiquin
Great x 2 Grandfather: Murdough O'Brien 1st Earl Inchiquin
Great x 1 Grandfather: William O'Brien 2nd Earl Inchiquin 13 x Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandfather: Warham St Leger
10 x Great Grand Son of King Edward "Longshanks" I of England
Great x 3 Grandfather: William St Leger President of Munster 11 x Great Grand Son of King Edward "Longshanks" I of England
Great x 2 Grandmother: Elizabeth St Leger Countess Inchiquin -1685 12 x Great Grand Daughter of King Edward "Longshanks" I of England
GrandFather: William O'Brien 3rd Earl Inchiquin 1662-1719 11 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Richard Boyle 1st Earl Cork
Great x 2 Grandfather: Roger Boyle 1st Earl Orrery
Great x 1 Grandmother: Margaret Boyle Countess Inchiquin 10 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Thomas Howard 1st Earl Suffolk
7 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Theophilus Howard 2nd Earl Suffolk 8 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Catherine Knyvet Countess Suffolk
9 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 2 Grandmother: Margaret Howard Countess Orrery 1622-1689 9 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: George Home 1st Earl Dunbar
Great x 3 Grandmother: Elizabeth Home Countess Suffolk 1599-1633 18 x Great Grand Daughter of King Henry I "Beauclerc" England
Great x 4 Grandmother: Elizabeth Gordon Countess Dunbar 1575-1645 17 x Great Grand Daughter of King Henry I "Beauclerc" England
Mother: Mary O'Brien Countess Kildare -1730 11 x Great Grand Daughter 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: Mary Villiers Countess Inchiquin -1753 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