Biography of William Fitzgerald De Ros 22nd Baron Ros Helmsley 1797-1874
Paternal Family Tree: Fitzgerald
On 01 Sep 1797 William Fitzgerald De Ros 22nd Baron Ros Helmsley was born to Henry Fitzgerald (age 36) and Charlotte Boyle 20th Baroness Ros Helmsley (age 28) at Thames Ditton, Surrey [Map]. He a great x 3 grandson of King Charles II of England Scotland and Ireland.
On 11 Mar 1820 Charles Augustus Fitzroy (age 23) and [his future sister-in-law] Mary Lennox (age 29) were married. She the daughter of Charles Lennox 4th Duke Richmond and Charlotte Gordon Duchess Richmond (age 51). He a great x 4 grandson of King Charles II of England Scotland and Ireland. She a great x 3 granddaughter of King Charles II of England Scotland and Ireland. 
In 1823 Admiral Maurice Frederick Fitzhardinge Berkeley (age 34) and [his future sister-in-law] Charlotte Lennox (age 19) were married. She the daughter of Charles Lennox 4th Duke Richmond and Charlotte Gordon Duchess Richmond (age 54). He the illegitmate son of Frederick Augustus Berkeley 5th Earl Berkeley and Mary Cole. They were third cousins. He a great x 3 grandson of King Charles II of England Scotland and Ireland. She a great x 3 granddaughter of King Charles II of England Scotland and Ireland. 
On 07 Jun 1824 William Fitzgerald De Ros 22nd Baron Ros Helmsley (age 26) and Georgiana Lennox Baroness Ros Helmsley (age 28) were married. She the daughter of Charles Lennox 4th Duke Richmond and Charlotte Gordon Duchess Richmond (age 55). They were second cousins. He a great x 3 grandson of King Charles II of England Scotland and Ireland. She a great x 3 granddaughter of King Charles II of England Scotland and Ireland.
On 11 Mar 1827 [his son] Dudley Fitzgerald De Ros 23rd Baron Ros Helmsley was born to William Fitzgerald De Ros 22nd Baron Ros Helmsley (age 29) and [his wife] Georgiana Lennox Baroness Ros Helmsley (age 31). Coefficient of inbreeding 1.58%.
On 08 Jul 1829 [his father] Henry Fitzgerald (age 67) died.
On 25 Oct 1829 [his brother-in-law] Frederick Lennox (age 28) died.
On 09 Jan 1831 [his mother] Charlotte Boyle 20th Baroness Ros Helmsley (age 61) died. Her son [his brother] Henry Fitzgerald 21st Baron Ros Helmsley (age 37) succeeded 21st Baron Ros Helmsley.
On 20 Aug 1833 [his sister-in-law] Charlotte Lennox (age 29) died.
On 29 Mar 1839 [his brother] Henry Fitzgerald 21st Baron Ros Helmsley (age 45) died. His brother William Fitzgerald De Ros 22nd Baron Ros Helmsley (age 41) succeeded 22nd Baron Ros Helmsley. [his wife] Georgiana Lennox Baroness Ros Helmsley (age 43) by marriage Baroness Ros Helmsley.
On 07 Dec 1847 [his sister-in-law] Mary Lennox (age 57) died in a carriage accident in Parramata Western Sydney.
The London Gazette 21926. At the Court at Buckingham-Palace, 27th day of February 1852
PRESENT, the The QUEEN's Most Excellent Majesty in Council.
HER Majesty in Council was this day pleased to declare the Right Honourable William, Earl of Lonsdale (age 64), Lord President of Her Majesty's Most Honourable Privy Council, and His Lord ship took his place at the Board accordingly.
day the Most Noble Algernon (age 59), Duke of Northumberland, the Right Honourable John William (age 40), Earl of Sandwich; the Right Honourable Archibald William (age 39), Earl of Eglinton; the Right Honourable Charles Philip (age 52), Earl of Hardwicke; the Right Honourable James Howard, Earl of Malmesbury; the Right Honourable John James Robert Manners (commonly called Lord John Manners); the Right Honourable Claude Hamilton (commonly called Lord Claude Hamilton); the Right Honourable William Lennox Lascelles (age 54), Lord De Ros; the Right Honourable Charles, Lord Colchester; the Right Honourable George Cecil Weld Forester; the Right Honourable Sir John Somerset Pakington, Bart.; the Right Honourable Spencer Horatio Walpole; the Right Honourable Benjamin Disraeli; the Right Honourable Joseph Warner Henley; the Right Honourable Robert Adam Christopher; the Right Honourable Wil liam Beresford; and the Right Honourable George Bankes; were, by Her Majesty's command, sworn of Her Majesty's Most Honourable Privy Council, and took their respective places at the Board accordingly.
The London Gazette 21397. St. James's-Palace, December 30, 1852. The Queen has been pleased to appoint John Robert (age 47) Viscount Sydney to be Captain of Her Majesty's Guard of Yeomen of the Guard, in the room of William-Lennox-Lascelles Lord de Ros (age 55), resigned
On 12 Oct 1853 [his son] Dudley Fitzgerald De Ros 23rd Baron Ros Helmsley (age 26) and [his daughter-in-law] Elizabeth Egerton Baroness Ros Helmsley (age 21) were married at Heaton, Lancashire. She the daughter of Thomas Grosvenor 2nd Earl Wilton (age 53) and Mary Smith-Stanley Countess Wilton (age 52). He a great x 4 grandson of King Charles II of England Scotland and Ireland. 
On 27 Mar 1861 [his sister-in-law] Jane Lennox (age 61) died.
On 15 Jan 1864 [his brother-in-law] Arthur Lennox (age 57) died.
On 08 Sep 1873 [his sister-in-law] Sarah Lennox (age 79) died.
On 10 Nov 1873 [his brother-in-law] John George Lennox (age 80) died.
On 06 Jan 1874 William Fitzgerald De Ros 22nd Baron Ros Helmsley (age 76) died at Old Court, Strangford, County Down. His son [his son] Dudley Fitzgerald De Ros 23rd Baron Ros Helmsley (age 46) succeeded 23rd Baron Ros Helmsley. [his daughter-in-law] Elizabeth Egerton Baroness Ros Helmsley (age 41) by marriage Baroness Ros Helmsley.
On 15 Dec 1891 [his former wife] Georgiana Lennox Baroness Ros Helmsley (age 96) died.
[his father] Henry Fitzgerald and [his mother] Charlotte Boyle 20th Baroness Ros Helmsley were married. He the son of James Fitzgerald 1st Duke Leinster and Emilia Mary Lennox Duchess Leinster. They were third cousin once removed. He a great x 2 grandson of King Charles II of England Scotland and Ireland.
Kings Wessex: Great x 20 Grand Son of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 17 Grand Son of Owain "Great" King Gwynedd
Kings Seisyllwg: Great x 21 Grand Son of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 18 Grand Son of Maredudd ap Bleddyn King Powys
Kings England: Great x 3 Grand Son of King Charles II of England Scotland and Ireland
Kings Scotland: Great x 15 Grand Son of Robert "The Bruce" I King Scotland
Kings Franks: Great x 17 Grand Son of Louis VII King Franks
Kings France: Great x 5 Grand Son of Henry IV King France
Great x 4 Grandfather: Edward Fitzgerald 5 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: George "Fairy Earl" Fitzgerald 16th Earl of Kildare 6 x Great Grand Son of King Edward III of England
Great x 2 Grandfather: Robert Fitzgerald 7 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Richard Boyle 1st Earl Cork
Great x 3 Grandmother: Joan Boyle Countess Kildare
Great x 4 Grandmother: Catherine Fenton Countess Cork
Great x 1 Grandfather: Robert Fitzgerald 19th Earl of Kildare 8 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: James Clotworthy
Great x 2 Grandmother: Mary Clotworthy
GrandFather: James Fitzgerald 1st Duke Leinster 9 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Murdough O'Brien 1st Earl Inchiquin
Great x 3 Grandfather: William O'Brien 2nd Earl Inchiquin 13 x Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandmother: Elizabeth St Leger Countess Inchiquin
12 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 2 Grandfather: William O'Brien 3rd Earl Inchiquin 11 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Roger Boyle 1st Earl Orrery
Great x 3 Grandmother: Margaret Boyle Countess Inchiquin 10 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Margaret Howard Countess Orrery
9 x Great Grand Daughter of King Edward III of England
Great x 1 Grandmother: Mary O'Brien Countess Kildare 11 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Edward Villiers
Great x 3 Grandfather: Edward Villiers 9 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Barbara St John
8 x Great Grand Daughter of King Edward III of England
Great x 2 Grandmother: Mary Villiers Countess Inchiquin 10 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Theophilus Howard 2nd Earl Suffolk 8 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Frances Howard 9 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Elizabeth Home Countess Suffolk 18 x Great Grand Daughter of King Henry I "Beauclerc" England
Father: Henry Fitzgerald 2 x Great Grand Son of King Charles II of England Scotland and Ireland
Great x 4 Grandfather: King Charles I of England, Scotland and Ireland Son of King James I of England and Ireland and VI of Scotland
Great x 3 Grandfather: King Charles II of England Scotland and Ireland Son of King Charles I of England, Scotland and Ireland
Great x 4 Grandmother: Henrietta Maria Bourbon Queen Consort England
7 x Great Grand Daughter of King Edward III of England
Great x 2 Grandfather: Charles Lennox 1st Duke Richmond Son of King Charles II of England Scotland and Ireland
Great x 4 Grandfather: Guillaume de Penancoët Seigneur de Kéroualle
Great x 3 Grandmother: Louise Kéroualle 1st Duchess Portsmouth
Great x 4 Grandmother: Marie de Plœuc
Great x 1 Grandfather: Charles Lennox 2nd Duke Richmond Grand Son of King Charles II of England Scotland and Ireland
Great x 4 Grandfather: Robert Brudenell 2nd Earl Cardigan
8 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Francis Brudenell 9 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Anna Savage Countess Cardigan
8 x Great Grand Daughter of King Edward III of England
Great x 2 Grandmother: Anne Brudenell Duchess Richmond 9 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Thomas Savile 1st Earl of Sussex
7 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Frances Savile 8 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Anne Villiers Countess Sussex 9 x Great Grand Daughter of King Edward III of England
GrandMother: Emilia Mary Lennox Duchess Leinster Great Grand Daughter of King Charles II of England Scotland and Ireland
Great x 4 Grandfather: William Cadogan
Great x 3 Grandfather: Henry Cadogan
Great x 2 Grandfather: William Cadogan 1st Earl Cadogan
Great x 4 Grandfather: Hardress Waller
Great x 3 Grandmother: Bridget Waller
Great x 1 Grandmother: Sarah Cadogan Duchess Richmond
Great x 2 Grandmother: Margaret Cecilia Munter Countess Cadogan
William Fitzgerald De Ros 22nd Baron Ros Helmsley 3 x Great Grand Son of King Charles II of England Scotland and Ireland
Great x 4 Grandfather: Richard Boyle 1st Earl Cork
Great x 3 Grandfather: Roger Boyle 1st Earl Orrery
Great x 4 Grandmother: Catherine Fenton Countess Cork
Great x 2 Grandfather: Henry Boyle 10 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Theophilus Howard 2nd Earl Suffolk 8 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Margaret Howard Countess Orrery 9 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Elizabeth Home Countess Suffolk 18 x Great Grand Daughter of King Henry I "Beauclerc" England
Great x 1 Grandfather: Henry Boyle 1st Earl Shannon 11 x Great Grand Son of King Edward III of England
GrandFather: Robert Boyle Walsingham 12 x Great Grand Son of King Edward III of England
Mother: Charlotte Boyle 20th Baroness Ros Helmsley 13 x Great Grand Daughter of King Edward III of England