On 08 Feb 1953 Jane Meriel Grosvenor Duchess Roxburghe was born to Robert George Grosvenor 5th Duke Westminster 1910-1979 (age 42) and Viola Maud Lyttelton Duchess Westminster 1912-1987 (age 40). Coefficient of inbreeding 1.63%. 
On 10 Sep 1977 Guy David Innes-Kerr 10th Duke Roxburghe 1954- (age 22) and Jane Meriel Grosvenor Duchess Roxburghe (age 24) were married. She by marriage Duchess Roxburghe. She the daughter of Robert George Grosvenor 5th Duke Westminster 1910-1979 (age 67) and Viola Maud Lyttelton Duchess Westminster 1912-1987 (age 65). He the son of George Victor Robert John Innes-Kerr 9th Duke Roxburghe and (age 58).
On 11 Jun 1996 Edward William Dawnay (age 46) and Jane Meriel Grosvenor Duchess Roxburghe (age 43) were married. She the daughter of Robert George Grosvenor 5th Duke Westminster 1910-1979 and Viola Maud Lyttelton Duchess Westminster 1912-1987. They were second cousins.
Paternal Family Tree: Grosvenor
Kings Wessex: Great x 26 Grand Daughter of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 22 Grand Daughter of Owain "Great" King Gwynedd 1100-1170
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 1047-1132
Kings England: Great x 13 Grand Daughter of King Henry VII of England and Ireland
Kings Scotland: Great x 19 Grand Daughter of Robert "The Bruce" I King Scotland
Kings Franks: Great x 22 Grand Daughter of Louis VII King Franks
Kings France: Great x 16 Grand Daughter of Charles "Beloved Mad" VI King France
Great x 4 Grandfather: Richard Grosvenor 1st Earl Grosvenor
Great x 3 Grandfather: Robert Grosvenor 1st Marquess Westminster
Great x 2 Grandfather: Richard Grosvenor 2nd Marquess Westminster 1795-1869 13 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Thomas Egerton 1st Earl Wilton
11 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Eleanor Egerton Marchioness Westminster 12 x Great Grand Daughter of King Edward III of England
Great x 1 Grandfather: Hugh Lupus Grosvenor 1st Duke Westminster 10 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandfather: Granville Leveson-Gower 1st Marquess Stafford 10 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: George Granville Leveson-Gower 1st Duke Sutherland 8 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandmother: Louisa Egerton Countess Gower 1723-1761 7 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 2 Grandmother: Elizabeth Mary Leveson-Gower Marchioness Westminster 1797-1891 9 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandfather: William Sutherland 18th Earl Sutherland 1735-1766 8 x Great Grand Son of King Henry VII of England and Ireland
Great x 3 Grandmother: Elizabeth Sutherland Duchess Sutherland 19th Countess Sutherland 9 x Great Grand Daughter of King Henry VII of England and Ireland
GrandFather: Hugh William Grosvenor 11 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandfather: George Augustus Henry Cavendish 1st Earl Burlington 1754-1834
8 x Great Grand Son of King Henry VII of England and Ireland
Great x 3 Grandfather: Charles Compton Cavendish 1st Baron Chesham 9 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandmother: Elizabeth Compton Countess Burlington 1760-1835
12 x Great Grand Daughter of King Edward III of England
Great x 2 Grandfather: William George Cavendish 2nd Baron Chesham 10 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandfather: George Gordon 9th Marquess Huntly 1761-1853 12 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Catherine Susan Gordon Baroness Chesham 11 x Great Grand Daughter of King Edward IV of England
Great x 4 Grandmother: Catherine Anne Cope Marchioness Huntly 1771-1832 10 x Great Grand Daughter of King Edward IV of England
Great x 1 Grandmother: Katherine Cavendish Duchess Westminster 11 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandfather: Henry Lascelles 2nd Earl Harewood 1767-1841
Great x 3 Grandfather: William Lascelles
Great x 2 Grandmother: Henrietta Frances Lascelles Baroness Chesham 11 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandfather: George Howard 6th Earl Carlisle 1773-1848
9 x Great Grand Son of King Henry VII of England and Ireland
Great x 3 Grandmother: Caroline Georgiana Howard 10 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandmother: Georgiana Cavendish Countess Carlisle 1783-1858 9 x Great Grand Daughter of King Henry VII of England and Ireland
Father: Robert George Grosvenor 5th Duke Westminster 1910-1979 12 x Great Grand Son of King Henry VII of England and Ireland
Great x 3 Grandfather: John Crichton 13 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Mary Caroline Hervey Countess Erne 1753-1842
12 x Great Grand Daughter of King Edward III of England
Great x 2 Grandfather: 14 x Great Grand Son of King Edward III of England
Great x 1 Grandfather: 14 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: John Beresford
11 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Charles Cobbe Beresford 12 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Constantia Ligondes
Great x 2 Grandmother: Selina Griselda Beresford Countess Erne 1804-1884 13 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: William Montgomery 1st Baronet
Great x 3 Grandmother: Amelia Montgomery
Great x 4 Grandmother: Anne Evatt
GrandMother: Mabel Florence Mary Creighton 15 x Great Grand Daughter of King Edward III of England
Jane Meriel Grosvenor Duchess Roxburghe 1953- 13 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandfather: William Henry Lyttelton 1st Baron Lyttelton 11 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: William Henry Lyttelton 3rd Baron Lyttelton 12 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Caroline Bristow Baroness Lyttelton
Great x 2 Grandfather: George William Lyttelton 4th Baron Lyttelton 12 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandfather: George John Spencer 2nd Earl Spencer
10 x Great Grand Son of King Henry VII of England and Ireland
Great x 3 Grandmother: Sarah Spencer 11 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandmother: Lavinia Bingham Countess Spencer 1762-1831
Great x 1 Grandfather: Charles Lyttelton 8th Viscount Cobham 11 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandfather: Stephen Glynne 7th Baronet
Great x 3 Grandfather: Stephen Richard Glynne 8th Baronet
Great x 2 Grandmother: Mary Glynne Lady Lyttelton 10 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandfather: Richard Griffin 2nd Baron Braybrook
11 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Mary Griffin 9 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandmother: Catherine Granville Baroness Braybrook
8 x Great Grand Daughter of King Henry VII of England and Ireland
GrandFather: John Cavendish Lyttelton 9th Viscount Cobham 12 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandfather: George Augustus Henry Cavendish 1st Earl Burlington 1754-1834 8 x Great Grand Son of King Henry VII of England and Ireland
Great x 3 Grandfather: Charles Compton Cavendish 1st Baron Chesham 9 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandmother: Elizabeth Compton Countess Burlington 1760-1835 12 x Great Grand Daughter of King Edward III of England
Great x 2 Grandfather: William George Cavendish 2nd Baron Chesham 10 x Great Grand Son of King Henry VII of England and Ireland
Great x 4 Grandfather: George Gordon 9th Marquess Huntly 1761-1853 12 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Catherine Susan Gordon Baroness Chesham 11 x Great Grand Daughter of King Edward IV of England
Great x 4 Grandmother: Catherine Anne Cope Marchioness Huntly 1771-1832 10 x Great Grand Daughter of King Edward IV of England
Great x 1 Grandmother: Mary Susan Cavendish Viscountess Cobham 11 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandfather: Henry Lascelles 2nd Earl Harewood 1767-1841
Great x 3 Grandfather: William Lascelles
Great x 2 Grandmother: Henrietta Frances Lascelles Baroness Chesham 11 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandfather: George Howard 6th Earl Carlisle 1773-1848 9 x Great Grand Son of King Henry VII of England and Ireland
Great x 3 Grandmother: Caroline Georgiana Howard 10 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 4 Grandmother: Georgiana Cavendish Countess Carlisle 1783-1858 9 x Great Grand Daughter of King Henry VII of England and Ireland
Mother: Viola Maud Lyttelton Duchess Westminster 1912-1987 13 x Great Grand Daughter of King Henry VII of England and Ireland
Great x 1 Grandfather: Charles Leonard
GrandMother: Violet Leonard Viscountess Cobham