On 28 Jun 1648 Henry Seymour (age 22) and [her mother] Mary Capell Duchess Beaufort (age 17) were married at Little Hadham, Hertfordshire [Map]. He the son of William Seymour 2nd Duke Somerset (age 60) and Frances Devereux Duchess of Somerset (age 48). They were fourth cousins. He a great x 4 grandson of King Henry VII of England and Ireland. 
Before 25 Dec 1660 [her father] Henry Somerset 1st Duke Beaufort (age 31) and [her mother] Mary Capell Duchess Beaufort (age 30) were married. He the son of Edward Somerset 2nd Marquess Worcester (age 58) and Elizabeth Dormer.
On 03 Apr 1667 [her grandfather] Edward Somerset 2nd Marquess Worcester (age 65) died. His son [her father] Henry Somerset 1st Duke Beaufort (age 38) succeeded 3rd Marquess Worcester, 7th Earl Worcester. [her mother] Mary Capell Duchess Beaufort (age 36) by marriage Marchioness Worcester.
Around 1669 Henrietta Somerset Countess Suffolk was born to Henry Somerset 1st Duke Beaufort (age 40) and Mary Capell Duchess Beaufort (age 38).
On 02 Dec 1682 [her father] Henry Somerset 1st Duke Beaufort (age 53) was created 1st Duke Beaufort by King Charles II of England Scotland and Ireland (age 52). [her mother] Mary Capell Duchess Beaufort (age 52) by marriage Duchess Beaufort.
On 24 Jun 1686 Henry Horatio O'Brien and Henrietta Somerset Countess Suffolk (age 17) were married. She the daughter of Henry Somerset 1st Duke Beaufort (age 57) and Mary Capell Duchess Beaufort (age 55). He the son of Henry O'Brien 7th Earl Thomond 1620-1691 (age 66) and Sarah Russell Countess Thomond 1638- (age 48).
On 14 Aug 1688 [her son] Henry O'Brien 8th Earl Thomond 1688-1741 was born to [her husband] Henry Horatio O'Brien and Henrietta Somerset Countess Suffolk (age 19).
Around 1690 [her husband] Henry Horatio O'Brien died of smallpox.
On 06 Sep 1691 [her future husband] Henry Howard 6th Earl Suffolk (age 21) and Auberie Anne Penelope O'Brien were married. She the daughter of Henry O'Brien 7th Earl Thomond 1620-1691 and Sarah Russell Countess Thomond 1638- (age 53). He the son of Henry Howard 5th Earl Suffolk (age 64) and Mary Stewart.
On 21 Jan 1700 [her father] 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 Henry Somerset 2nd Duke Beaufort (age 15) succeeded 2nd Duke Beaufort, 4th Marquess Worcester, 8th Earl Worcester.
In Apr 1705 Henry Howard 6th Earl Suffolk (age 35) and Henrietta Somerset Countess Suffolk (age 36) were married. She the daughter of Henry Somerset 1st Duke Beaufort and Mary Capell Duchess Beaufort (age 74). He the son of Henry Howard 5th Earl Suffolk (age 77) and Mary Stewart.
In 1707 [her son] Henry O'Brien 8th Earl Thomond 1688-1741 (age 18) and [her daughter-in-law] Elizabeth Seymour Countess Thomond 1685-1734 (age 22) were married. She by marriage Countess Thomond. She the daughter of Charles Seymour 6th Duke Somerset (age 44) and Elizabeth Percy Duchess Somerset (age 39). He the son of Henry Horatio O'Brien and Henrietta Somerset Countess Suffolk 1669-1715 (age 38).
On 10 Dec 1709 [her father-in-law] Henry Howard 5th Earl Suffolk (age 82) died. His son [her husband] Henry Howard 6th Earl Suffolk (age 39) succeeded 6th Earl Suffolk. Henrietta Somerset Countess Suffolk (age 40) by marriage Countess Suffolk.
On 07 Jan 1715 [her mother] Mary Capell Duchess Beaufort (age 84) died.
On 10 Aug 1715 Henrietta Somerset Countess Suffolk (age 46) died at Audley End House, Saffron Walden [Map].
On 19 Sep 1718 [her former husband] Henry Howard 6th Earl Suffolk (age 48) died. He was buried at Waldon Priory and Abbey [Map]. His son [her former step-son] Charles William Howard 7th Earl Suffolk 1693-1722 (age 25) succeeded 7th Earl Suffolk.
Paternal Family Tree: Anjou aka Plantagenet
Maternal Family Tree: Elizabeth May Viscountess Campden 1562-1643
Kings Wessex: Great x 19 Grand Daughter of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 16 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 17 Grand Daughter of Maredudd ap Bleddyn King Powys 1047-1132
Kings England: Great x 10 Grand Daughter of King Edward III of England
Kings Scotland: Great x 14 Grand Daughter of William "Lion" I King Scotland
Kings Franks: Great x 16 Grand Daughter of Louis VII King Franks
Kings France: Great x 12 Grand Daughter of Philip "Bold" III King France
Great x 4 Grandfather: Henry Somerset 2nd Earl of Worcester 4 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: William Somerset 3rd Earl of Worcester 5 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Elizabeth Browne Countess of Worcester
4 x Great Grand Daughter of King Edward III of England
Great x 2 Grandfather: Edward Somerset 4th Earl of Worcester 6 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Edward North 1st Baron North
Great x 3 Grandmother: Christina North Countess of Worcester -1558
Great x 4 Grandmother: Alice Squier Baroness North
Great x 1 Grandfather: Henry Somerset 1st Marquess Worcester 1577-1646 7 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: George Hastings 1st Earl Huntingdon
4 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Francis Hastings 2nd Earl Huntingdon 5 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Anne Stafford Countess Huntingdon
4 x Great Grand Daughter of King Edward III of England
Great x 2 Grandmother: Elizabeth Hastings Countess of Worcester 1546-1621 6 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Henry Pole 1st Baron Montagu 4 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Catherine Pole Countess Huntingdon 5 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Jane Neville Baroness Montagu 4 x Great Grand Daughter of King Edward III of England
GrandFather: Edward Somerset 2nd Marquess Worcester 8 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: John Russell 1st Earl Bedford
Great x 3 Grandfather: Francis Russell 2nd Earl Bedford
Great x 4 Grandmother: Anne Sapcote Countess Bedford
Great x 2 Grandfather: John Russell 9 x Great Grand Son of King John "Lackland" of England
Great x 4 Grandfather: John St John
9 x Great Grand Son of King John "Lackland" of England
Great x 3 Grandmother: Margaret St John Countess Bedford 8 x Great Grand Daughter of King John "Lackland" of England
Great x 4 Grandmother: Margaret Waldegrave
7 x Great Grand Daughter of King John "Lackland" of England
Great x 1 Grandmother: Anne Russell 2nd Marchioness Worcester 1578-1639 10 x Great Grand Daughter of King John "Lackland" of England
Great x 4 Grandfather: John Cooke of Gidea Hall
Great x 3 Grandfather: Anthony Cooke
Great x 4 Grandmother: Alice Saunders
Great x 2 Grandmother: Elizabeth Cooke 14 x Great Grand Daughter of King Henry I "Beauclerc" England
Great x 4 Grandfather: William Fitzwilliam
12 x Great Grand Son of King Henry I "Beauclerc" England
Great x 3 Grandmother: Anne Fitzwilliam 13 x Great Grand Daughter of King Henry I "Beauclerc" England
Father: Henry Somerset 1st Duke Beaufort 9 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: William Dormer
Great x 3 Grandfather: Robert Dormer 1st Baron Dormer
Great x 4 Grandmother: Dorothy Catesby
Great x 2 Grandfather: William Dormer 7 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Anthony Browne 1st Viscount Montagu 5 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Elizabeth Browne Baroness Dormer 6 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Magdalen Dacre Viscountess Montague
5 x Great Grand Daughter of King Edward III of England
Great x 1 Grandfather: Robert Dormer 1st Earl Carnarvon 1610-1643 8 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: William Molyneux
8 x Great Grand Son of King Edward "Longshanks" I of England
Great x 3 Grandfather: Richard Molyneux 1st Baronet 9 x Great Grand Son of King Edward "Longshanks" I of England
Great x 2 Grandmother: Alice Molyneux 10 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandfather: Gilbert Gerard
Great x 3 Grandmother: Frances Gerard Lady Molyneux
Great x 4 Grandmother: Anne Ratclyffe
GrandMother: Elizabeth Dormer 9 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: William Herbert 1st Earl Pembroke
Great x 3 Grandfather: Henry Herbert 2nd Earl Pembroke 6 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Anne Parr Countess Pembroke
5 x Great Grand Daughter of King Edward III of England
Great x 2 Grandfather: Philip Herbert 4th Earl Pembroke 1st Earl Montgomery 7 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Henry Sidney
Great x 3 Grandmother: Mary Sidney Countess Pembroke 1561-1621 9 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandmother: Mary Dudley
8 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 1 Grandmother: Anne Sophia Herbert Countess Carnarvon 8 x Great Grand Daughter of King Edward III 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 Grandfather: Edward de Vere 17th Earl of Oxford 7 x Great Grand Son of King Edward "Longshanks" I of England
Great x 2 Grandmother: Susan Vere Countess Montgomery 8 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandfather: William Cecil 1st Baron Burghley
Great x 3 Grandmother: Anne Cecil Countess of Oxford 15 x Great Grand Daughter of King Henry I "Beauclerc" England
Great x 4 Grandmother: Mildred Cooke Baroness Burghley 14 x Great Grand Daughter of King Henry I "Beauclerc" England
Henrietta Somerset Countess Suffolk 1669-1715 10 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Edward Capell 10 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Henry Capell 11 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 2 Grandfather: Arthur Capell 6 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Thomas Manners 1st Earl of Rutland
4 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Catherine Manners 5 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Eleanor Paston Countess Rutland
Great x 1 Grandfather: Henry Capell 7 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Thomas Grey 2nd Marquess Dorset
4 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: John Grey 5 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Margaret Wotton Marchioness Dorset
Great x 2 Grandmother: Margaret Grey 6 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Anthony Browne 4 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Mary Browne 5 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Alice Gage
GrandFather: Arthur Capell 1st Baron Capell Hadham 8 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Thomas Montagu
6 x Great Grand Son of King Edward "Longshanks" I of England
Great x 3 Grandfather: Edward Montagu 7 x Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandmother: Agnes Dudley
Great x 2 Grandfather: Edward Montagu 8 x Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandfather: John Roper of Well Hall
Great x 3 Grandmother: Helen Roper
Great x 1 Grandmother: Theodosia Montagu 9 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandfather: John Alexander Harrington
Great x 3 Grandfather: James Harrington
Great x 4 Grandmother: Elizabeth Moton
Great x 2 Grandmother: Elizabeth Harrington
Great x 4 Grandfather: William Sidney
Great x 3 Grandmother: Lucy Sidney
Great x 4 Grandmother: Anne Pakenham
Mother: Mary Capell Duchess Beaufort 9 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Thomas Morison of Hertfordshire
Great x 3 Grandfather: Richard Morrison
Great x 2 Grandfather: Charles Morrison 6 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: John Hussey 1st Baron Hussey of Sleaford
9 x Great Grand Son of King John "Lackland" of England
Great x 3 Grandmother: Bridget Hussey Countess Bedford 5 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Anne Grey Baroness Hussey Sleaford 4 x Great Grand Daughter of King Edward III of England
Great x 1 Grandfather: Charles Morrison 7 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Nicholas Clerke
Great x 2 Grandmother: Dorothea Clerke
GrandMother: Elizabeth Morrison Baroness Capell Hadham 8 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: John Hicks
Great x 3 Grandfather: Robert Hicks
Great x 2 Grandfather: Baptist Hicks 1st Viscount Campden
Great x 1 Grandmother: Mary Hicks Lady Cooper
Great x 3 Grandfather: Richard May
Great x 2 Grandmother: Elizabeth May Viscountess Campden