In 1524 [her father] William Cavendish (age 19) and Margaret Bostock (age 16) were married.
In 1542 [her father] William Cavendish (age 37) and Elizabeth Parker were married.
In 1543 Robert Barlow aka Barley (age 14) and [her mother] Bess of Hardwick Countess Shrewsbury and Waterford (age 16) were married.
On 20 Aug 1547 [her father] William Cavendish (age 42) and [her mother] Bess of Hardwick Countess Shrewsbury and Waterford (age 20) were married. The difference in their ages was 22 years.
On 31 Mar 1555 Elizabeth Cavendish Countess Lennox was born to William Cavendish (age 50) and Bess of Hardwick Countess Shrewsbury and Waterford (age 28) at Chatsworth House [Map].
On 25 Oct 1557 [her father] William Cavendish (age 52) died.
Around 27 Aug 1559 [her step-father] William St Lo (age 41) and [her mother] Bess of Hardwick Countess Shrewsbury and Waterford (age 32) were married.
In 1568 [her step-father] George Talbot 6th Earl of Shrewsbury (age 40) and [her mother] Bess of Hardwick Countess Shrewsbury and Waterford (age 41) were married. She by marriage Countess of Shrewsbury Countess Waterford. He the son of Francis Talbot 5th Earl of Shrewsbury and Mary Dacre. He a great x 5 grandson of King Edward III of England. 
In 1571 [her future husband] Charles Stewart 5th Earl Lennox 1557-1576 (age 13) was created 1st Earl Lennox by older brother King James I of England and Ireland and VI of Scotland (age 4) who had inherited the Earl Lennox when he became King.
On 04 Sep 1571 Matthew Stewart 4th Earl Lennox (age 54) died at Stirling Castle [Map]. On 04 Sep 1571 His son [her future husband] Charles Stewart 5th Earl Lennox 1557-1576 (age 14) succeeded 5th Earl Lennox.
In 1574 Charles Stewart 5th Earl Lennox 1557-1576 (age 16) and Elizabeth Cavendish Countess Lennox (age 18) were married. She by marriage Countess Lennox. She the daughter of William Cavendish and Bess of Hardwick Countess Shrewsbury and Waterford (age 47). He the son of Matthew Stewart 4th Earl Lennox and Margaret Douglas Countess Lennox (age 58). He a great grandson of King Henry VII of England and Ireland. 
In 1575 [her daughter] Arabella Stewart was born to [her husband] Charles Stewart 5th Earl Lennox 1557-1576 (age 17) and Elizabeth Cavendish Countess Lennox (age 19). She a great x 2 granddaughter of King Henry VII of England and Ireland.
In Apr 1576 [her husband] Charles Stewart 5th Earl Lennox 1557-1576 (age 18) died.
On 21 Jan 1582 Elizabeth Cavendish Countess Lennox (age 26) died.
Paternal Family Tree: Cavendish
Maternal Family Tree: Margaret Vaux 1465
Kings Wessex: Great x 16 Grand Daughter of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 11 Grand Daughter of Owain "Great" King Gwynedd 1100-1170
Kings Seisyllwg: Great x 17 Grand Daughter of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 12 Grand Daughter of Maredudd ap Bleddyn King Powys 1047-1132
Kings England: Great x 8 Grand Daughter of King Edward "Longshanks" I of England
Kings Scotland: Great x 14 Grand Daughter of Malcolm III King Scotland
Kings Franks: Great x 12 Grand Daughter of Louis VII King Franks
Kings France: Great x 12 Grand Daughter of Louis "Fat" VI King France
Great x 4 Grandfather: John Cavendish
Great x 3 Grandfather: John Cavendish
Great x 4 Grandmother: Alice Odingsells
Great x 2 Grandfather: William Cavendish
Great x 4 Grandfather: William Clopton
Great x 3 Grandmother: Joan Clopton
Great x 4 Grandmother: Ivetta Grey
Great x 1 Grandfather: Thomas Cavendish
Great x 2 Grandmother: Joan Staventon
GrandFather: Thomas Cavendish 6 x Great Grand Son of King Edward "Longshanks" I of England
Great x 2 Grandfather: John Scudamore
Great x 1 Grandmother: Catherine Scudamore 5 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandfather: Gruffudd Fychan II Mathrafal
Great x 3 Grandfather: Owain ap Gruffudd "Glyndŵr" Mathrafal Prince Powys 3 x Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandmother: Elen 2 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 2 Grandmother: Alys Mathrafal 4 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandfather: David Hamner
Great x 3 Grandmother: Margaret Hamner
Father: William Cavendish 7 x Great Grand Son of King Edward "Longshanks" I of England
Great x 1 Grandfather: John Carrington Smith
GrandMother: Alice Smith
Elizabeth Cavendish Countess Lennox 1555-1582 8 x Great Grand Daughter of King Edward "Longshanks" I of England
GrandFather: John Hardwick
Mother: Bess of Hardwick Countess Shrewsbury and Waterford
Great x 4 Grandfather: Simon Leeke
Great x 3 Grandfather: John Leeke of Cotham
Great x 2 Grandfather: William Leeke of Lakeford
Great x 1 Grandfather: Thomas Leeke of Hasland
GrandMother: Elizabeth Leeke
Great x 4 Grandfather: William Vaux
Great x 3 Grandfather: William Vaux
Great x 2 Grandfather: William Vaux of Harrowden
Great x 1 Grandmother: Margaret Vaux
