Paternal Family Tree: Smithson
Maternal Family Tree: Jean Nicholson -1778
On 18th November 1911 Alan Ian Percy 8th Duke Northumberland [aged 31] and Helen Gordon-Lennox Duchess Northumberland [aged 24] were married. She the daughter of [her grandfather] Charles Gordon-Lennox 7th Duke Richmond [aged 65] and [her grandmother] Isabel Sophie Craven. He the son of Henry George Percy 7th Duke Northumberland [aged 65] and Edith Campbell Duchess Northumberland [aged 62]. They were fifth cousins.
On 23rd November 1917 Diana Evelyn Percy Duchess of Sutherland was born to Alan Ian Percy 8th Duke Northumberland [aged 37] and Helen Gordon-Lennox Duchess Northumberland [aged 30].
On 14th May 1918 Henry George Percy 7th Duke Northumberland [aged 71] died. He was buried at the Church of St Mary the Virgin, Lesbury [Map]. His son Alan [aged 38] succeeded 8th Duke Northumberland, 5th Earl Beverley, 11th Baronet Smithson of Stanwick in Yorkshire. Helen Gordon-Lennox Duchess Northumberland [aged 31] by marriage Duchess Northumberland.
After June 1924. Philip de László [aged 55]. Portrait of Diana Evelyn Percy [aged 6] and [her brother] Richard Charles Percy [aged 3].
The Duchess of Northumberland [aged 37] commissioned this double portrait of her children Diana and Richard at the end of June 1924, enquiring if de László could paint them almost immediately: "I wonder if you would be able to do a picture of Diana & Richard within the next fortnight or three weeks as they will be staying in town from next Wed 25th for a short time & I could arrange for it then if it would be quite convenient to you to paint them then. I thought something after the same idea as the lovely portrait you did of Betty two years ago, either together or separate."
Richard Charles Percy: On 11th February 1921 he was born to Alan Ian Percy 8th Duke Northumberland and Helen Gordon-Lennox Duchess Northumberland. On 20th December 1989 he died.
1928. Philip de László [aged 58]. Portrait of Diana Evelyn Percy Duchess of Sutherland [aged 10].
On 23rd August 1930 Alan Ian Percy 8th Duke Northumberland [aged 50] died. His son Henry [aged 18] succeeded 9th Duke Northumberland, 6th Earl Beverley, 12th Baronet Smithson of Stanwick in Yorkshire.
On 29th April 1939 John Sutherland Egerton 6th Duke Sutherland [aged 23] and Diana Evelyn Percy Duchess of Sutherland [aged 21] were married. She the daughter of Alan Ian Percy 8th Duke Northumberland and Helen Gordon-Lennox Duchess Northumberland [aged 52]. He the son of John Francis Granville Scrope Egerton 4th Earl Ellesmere [aged 66] and Violet Lambton Countess Ellesmere [aged 58]. They were fourth cousins.
On 21st May 1940 Henry George Alan Percy 9th Duke Northumberland [aged 27] was killed in action at Pecq in Belgium, serving with the 3rd Battalion Grenadier Guards, in a brave charge against overwhelming odds that was described as suicidal. His body is interred in the Esquelmes War Cemetery. His brother Hugh [aged 26] succeeded 10th Duke Northumberland, 7th Earl Beverley, 13th Baronet Smithson of Stanwick in Yorkshire.
On 24th August 1944 [her father-in-law] John Francis Granville Scrope Egerton 4th Earl Ellesmere [aged 71] died. His son John [aged 29] succeeded 5th Earl Ellesmere, 5th Viscount Brackley. Diana Evelyn Percy [aged 26] by marriage Countess Ellesmere.
On 12th June 1946 Hugh Algernon Percy 10th Duke Northumberland [aged 32] and [her sister-in-law] Elizabeth Diana Montagu-Douglas-Scott Duchess Northumberland [aged 24] were married. She by marriage Duchess Northumberland. She the daughter of Walter Scott 8th Duke Buccleuch 10th Duke Queensberry [aged 51] and Vreda Lascelles Duchess Buccleuch and Queensbury [aged 45]. He the son of [her father] Alan Ian Percy 8th Duke Northumberland and [her mother] Helen Gordon-Lennox Duchess Northumberland [aged 59]. They were fourth cousins.
1954. Norman Parkinson. Photograph of Diana Evelyn Percy Duchess of Sutherland [aged 36].
On 8th May 1957 James Stewart-Murray 9th Duke of Atholl [aged 77] died unmarried. His fourth cousin Iain [aged 25] succeeded 10th Duke Atholl, 11th Marquess Atholl, 12th Earl Atholl, 13th Earl Tullibardine, 6th Baron Glenlyon of Glenlyon in Perthshire. Baron Strange Knockin abeyant. His fourth cousin once removed Hugh [aged 43] succeeded 9th Baron Percy.
On 1st February 1963 George Sutherland-Leveson-Gower 5th Duke of Sutherland [aged 74] died. His third cousin once removed John [aged 47] succeeded 6th Duke Sutherland, 6th Marquess Stafford, 8th Earl Gower, 9th Baron Gower, 13th Baronet Gower of Stittenham in Yorkshire. Diana Evelyn Percy [aged 45] by marriage Duchess Sutherland.His niece Elizabeth [aged 41] succeeded 24th Countess Sutherland.
On 13th June 1965 Helen Gordon-Lennox Duchess Northumberland [aged 78] died.
On 16th June 1978 Diana Evelyn Percy Duchess of Sutherland [aged 60] died.
On 21st September 2000 John Sutherland Egerton 6th Duke Sutherland [aged 85] died. His first cousin once removed Francis [aged 60] succeeded 7th Duke Sutherland, 7th Marquess Stafford, 6th Earl Ellesmere, 9th Earl Gower, 6th Viscount Brackley, 10th Baron Gower, 14th Baronet Gower of Stittenham in Yorkshire.
Kings Wessex: Great x 25 Grand Daughter of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 22 Grand Daughter of Owain "Great" King Gwynedd
Kings Seisyllwg: Great x 28 Grand Daughter of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 23 Grand Daughter of Maredudd ap Bleddyn King Powys
Kings Godwinson: Great x 25 Grand Daughter of King Harold II of England
Kings England: Great x 7 Grand Daughter of King Charles II of England Scotland and Ireland
Kings Scotland: Great x 7 Grand Daughter of King Charles II of England Scotland and Ireland
Kings France: Great x 9 Grand Daughter of Henry IV King France
Kings Duke Aquitaine: Great x 30 Grand Daughter of Ranulf I Duke Aquitaine
Kings Spain: Great x 14 Grand Daughter of John II King Aragon
Great x 4 Grandfather: Hugh Percy 1st Duke Northumberland 
Great x 3 Grandfather: Algernon Percy 1st Earl Beverley 8 x Great Grandson of King Henry VII of England and Ireland
Great x 4 Grandmother: Elizabeth Seymour Duchess Northumberland 
7 x Great Granddaughter of King Henry VII of England and Ireland
Great x 2 Grandfather: George Percy 5th Duke Northumberland 9 x Great Grandson of King Henry VII of England and Ireland
Great x 4 Grandfather: Peter Burrell
Great x 3 Grandmother: Isabella Susan Burrell Countess Beverley
Great x 4 Grandmother: Elizabeth Lewis 
Great x 1 Grandfather: Algernon George Percy 6th Duke Northumberland 9 x Great Grandson of King James V of Scotland
Great x 4 Grandfather: John Stuart 3rd Earl Bute 
6 x Great Grandson of King James V of Scotland
Great x 3 Grandfather: James Archibald Stuart-Wortley-Mackenzie 7 x Great Grandson of King James V of Scotland
Great x 4 Grandmother: Mary Wortley-Montagu Countess Bute 
10 x Great Granddaughter of King Edward III of England
Great x 2 Grandmother: Louisa Harcourt Stuart-Wortley-Mackenzie 8 x Great Granddaughter of King James V of Scotland
Great x 4 Grandfather: David Cunynghame 3rd Baronet
Great x 3 Grandmother: Margaret Cunynghame
Grandfather: Henry George Percy 7th Duke Northumberland 10 x Great Grandson of King James V of Scotland
Great x 2 Grandfather: Henry Drummond
Great x 1 Grandmother: Louisa Drummond Duchess Northumberland 15 x Great Granddaughter of King Edward III of England
Great x 4 Grandfather: Archbishop Robert Hay-Drummond 
12 x Great Grandson of King Edward III of England
Great x 3 Grandfather: Robert Hay-Drummond 10th Earl Kinnoul 13 x Great Grandson of King Edward III of England
Great x 4 Grandmother: Henrietta d'Auriol
Great x 2 Grandmother: Henrietta Hay-Drummond 14 x Great Granddaughter of King Edward III of England
Great x 4 Grandfather: Thomas Harley 12 x Great Grandson of King Edward III of England
Great x 3 Grandmother: Sarah Harley Countess Kinnoul 13 x Great Granddaughter of King Edward III of England
Great x 4 Grandmother: Anne Bangham
Father: Alan Ian Percy 8th Duke Northumberland 10 x Great Grandson of King James V of Scotland
Great x 4 Grandfather: John Campbell 4th Duke Argyll 5 x Great Grandson of King James V of Scotland
Great x 3 Grandfather: John Campbell 5th Duke Argyll 6 x Great Grandson of King James V of Scotland
Great x 4 Grandmother: Mary Drummond Bellenden 5 x Great Granddaughter of King James IV of Scotland
Great x 2 Grandfather: John Douglas Edward Henry Campbell 7th Duke Argyll 7 x Great Grandson of King James V of Scotland
Great x 4 Grandfather: John Barnaby Gunning
Great x 3 Grandmother: Elizabeth Gunning Duchess Hamilton and Argyll
Great x 4 Grandmother: Bridget Bourke
Great x 1 Grandfather: George Douglas Campbell 8th Duke Argyll 8 x Great Grandson of King James V of Scotland
Great x 3 Grandfather: John Glassel
Great x 2 Grandmother: Joan Glassel
Grandmother: Edith Campbell Duchess Northumberland 9 x Great Granddaughter of King James V of Scotland
Great x 4 Grandfather: Granville Leveson-Gower 1st Marquess Stafford 10 x Great Grandson of King Edward III of England
Great x 3 Grandfather: George Granville Leveson-Gower 1st Duke Sutherland 8 x Great Grandson of King Henry VII of England and Ireland
Great x 4 Grandmother: Louisa Egerton Countess Gower 
7 x Great Granddaughter of King Henry VII of England and Ireland
Great x 2 Grandfather: George Sutherland Leveson-Gower 2nd Duke Sutherland 8 x Great Grandson of King James V of Scotland
Great x 4 Grandfather: William Sutherland 18th Earl Sutherland 6 x Great Grandson of King James V of Scotland
Great x 3 Grandmother: Elizabeth Sutherland Duchess Sutherland 19th Countess Sutherland 7 x Great Granddaughter of King James V of Scotland
Great x 1 Grandmother: Elizabeth Georgiana Leveson-Gower Duchess Argyll 9 x Great Granddaughter of King James V of Scotland
Great x 4 Grandfather: Frederick Howard 5th Earl Carlisle 
11 x Great Grandson of King Edward III of England
Great x 3 Grandfather: George Howard 6th Earl Carlisle 9 x Great Grandson of King Henry VII of England and Ireland
Great x 4 Grandmother: Margaret Caroline Leveson-Gower Countess Carlisle 8 x Great Granddaughter of King Henry VII of England and Ireland
Great x 2 Grandmother: Harriet Elizabeth Georgiana Howard Duchess Sutherland 10 x Great Granddaughter of King Henry VII of England and Ireland
Great x 4 Grandfather: William Cavendish 5th Duke Devonshire 8 x Great Grandson of King Henry VII of England and Ireland
Great x 3 Grandmother: Georgiana Cavendish Countess Carlisle 
9 x Great Granddaughter of King Henry VII of England and Ireland
Great x 4 Grandmother: Georgiana Spencer Duchess Devonshire 
10 x Great Granddaughter of King Henry VII of England and Ireland
Diana Evelyn Percy Duchess of Sutherland 7 x Great Granddaughter of King Charles II of England Scotland and Ireland
Great x 4 Grandfather: George Lennox 
Great Grandson of King Charles II of England Scotland and Ireland
Great x 3 Grandfather: Charles Lennox 4th Duke Richmond 2 x Great Grandson of King Charles II of England Scotland and Ireland
Great x 4 Grandmother: Louisa Kerr 4 x Great Granddaughter of King James I of England and Ireland and VI of Scotland
Great x 2 Grandfather: Charles Gordon-Lennox 5th Duke Richmond 3 x Great Grandson of King Charles II of England Scotland and Ireland
Great x 4 Grandfather: Alexander Gordon 4th Duke Gordon 8 x Great Grandson of King James IV of Scotland
Great x 3 Grandmother: Charlotte Gordon Duchess Richmond 9 x Great Granddaughter of King James IV of Scotland
Great x 4 Grandmother: Jane Maxwell Duchess Gordon 
Great x 1 Grandfather: Charles Gordon-Lennox 6th Duke Richmond 4 x Great Grandson of King Charles II of England Scotland and Ireland
Great x 4 Grandfather: Henry Bayly-Paget 1st Earl Uxbridge 
12 x Great Grandson of King Edward III of England
Great x 3 Grandfather: Henry William Paget 1st Marquess Anglesey 13 x Great Grandson of King Edward III of England
Great x 4 Grandmother: Jane Champagné Countess Uxbridge
Great x 2 Grandmother: Caroline Paget Duchess Richmond 10 x Great Granddaughter of King Henry VII of England and Ireland
Great x 4 Grandfather: George Bussy Villiers 4th Earl Jersey 
8 x Great Grandson of King Henry VII of England and Ireland
Great x 3 Grandmother: Caroline Elizabeth Villiers Duchess Argyll 9 x Great Granddaughter of King Henry VII of England and Ireland
Great x 4 Grandmother: Frances Twysden 
Grandfather: Charles Gordon-Lennox 7th Duke Richmond 5 x Great Grandson of King Charles II of England Scotland and Ireland
Great x 4 Grandfather: Fulke Greville 
11 x Great Grandson of King Edward III of England
Great x 3 Grandfather: Charles Greville 12 x Great Grandson of King Edward III of England
Great x 2 Grandfather: Algernon Frederick Greville 10 x Great Grandson of King Henry VII of England and Ireland
Great x 4 Grandfather: William Cavendish-Bentinck 3rd Duke Portland 
9 x Great Grandson of King Edward IV of England
Great x 3 Grandmother: Charlotte Cavendish-Bentinck 9 x Great Granddaughter of King Henry VII of England and Ireland
Great x 4 Grandmother: Dorothy Cavendish 3rd Duchess Portland 8 x Great Granddaughter of King Henry VII of England and Ireland
Great x 1 Grandmother: Frances Harriett Greville Duchess Richmond 11 x Great Granddaughter of King Henry VII of England and Ireland
Great x 2 Grandmother: Charlotte Maria Cox
Mother: Helen Gordon-Lennox Duchess Northumberland 6 x Great Granddaughter of King Charles II of England Scotland and Ireland
Great x 4 Grandfather: William Craven 6th Baron Craven 
Great x 3 Grandfather: William Craven 1st Earl Craven 3 x Great Grandson of King Charles II of England Scotland and Ireland
Great x 4 Grandmother: Elizabeth Berkeley Margrave Brandenburg-Ansbach 
2 x Great Granddaughter of King Charles II of England Scotland and Ireland
Great x 2 Grandfather: George Augustus Craven 4 x Great Grandson of King Charles II of England Scotland and Ireland
Great x 3 Grandmother: Louisa Brunton Countess Craven
Great x 1 Grandfather: William George Craven 5 x Great Grandson of King Charles II of England Scotland and Ireland
Grandmother: Isabel Sophie Craven 6 x Great Granddaughter of King Charles II of England Scotland and Ireland
Great x 4 Grandfather: Charles Yorke 
Great x 3 Grandfather: Admiral Joseph Sydney Yorke
Great x 4 Grandmother: Agneta Johnson
Great x 2 Grandfather: Charles Yorke 4th Earl of Hardwicke
Great x 4 Grandfather: James Rattray
Great x 3 Grandmother: Elizabeth Weake Rattray
Great x 1 Grandmother: Mary Catherine Craven 12 x Great Granddaughter of King James I of Scotland
Great x 4 Grandfather: Henry George Liddell 5th Baronet 
13 x Great Grandson of King Edward III of England
Great x 3 Grandfather: Thomas Liddell 1st Baron Ravensworth 14 x Great Grandson of King Edward III of England
Great x 2 Grandmother: Susan Liddell Countess Hardwicke 11 x Great Granddaughter of King James I of Scotland
Great x 4 Grandfather: John Simpson
Great x 3 Grandmother: Maria Susannah Simpson Baroness Calthorpe 10 x Great Granddaughter of King James I of Scotland
Great x 4 Grandmother: Anne Lyon 9 x Great Granddaughter of King James I of Scotland