On 31 May 1825 [his father] Edward Smith-Stanley 14th Earl of Derby (age 26) and [his mother] Emma Caroline Bootle-Wilbraham Countess Derby 1805-1876 (age 20) were married. She by marriage Countess Derby. He the son of Edward Smith-Stanley 13th Earl of Derby (age 50) and .
On 21 Jul 1826 Edward Henry Stanley 15th Earl of Derby was born to Edward Smith-Stanley 14th Earl of Derby (age 27) and Emma Caroline Bootle-Wilbraham Countess Derby 1805-1876 (age 21).
On 29 Apr 1847 James Brownlow William Gascoyne-Cecil 2nd Marquess Salisbury (age 56) and [his future wife] Mary Catherine Sackville-West Marchioness Salisbury 1824-1900 (age 22) were married. She by marriage Marchioness Salisbury in Wiltshire. The difference in their ages was 33 years. She the daughter of George Sackville-West 5th Earl De La Warr 1791-1869 (age 55) and Elizabeth Sackville Countess De La Warr 1795-1870 (age 51). He the son of James Cecil 1st Marquess Salisbury and Mary Amelia Hill Marchioness Salisbury 1750-1835.
On 30 Jun 1851 [his grandfather] Edward Smith-Stanley 13th Earl of Derby (age 76) died. His son [his father] Edward Smith-Stanley 14th Earl of Derby (age 52) succeeded 14th Earl Derby, 8th Baronet Stanley of Bickerstaffe.
Before 15 May 1867 [his future brother-in-law] William Sackville-West (age 37) and Georgina Dodwell were married. He the son of George Sackville-West 5th Earl De La Warr 1791-1869 (age 75) and Elizabeth Sackville Countess De La Warr 1795-1870 (age 71).
On 23 Oct 1869 [his father] Edward Smith-Stanley 14th Earl of Derby (age 70) died. His son Edward Henry Stanley 15th Earl of Derby (age 43) succeeded 15th Earl Derby, 9th Baronet Stanley of Bickerstaffe.
In 1870 Edward Henry Stanley 15th Earl of Derby (age 43) and Mary Catherine Sackville-West Marchioness Salisbury 1824-1900 (age 45) were married. She by marriage Countess Derby. She the daughter of George Sackville-West 5th Earl De La Warr 1791-1869 and Elizabeth Sackville Countess De La Warr 1795-1870 (age 74). He the son of Edward Smith-Stanley 14th Earl of Derby and Emma Caroline Bootle-Wilbraham Countess Derby 1805-1876 (age 65).
In 1872 Alan Stewart 10th Earl Galloway 1835-1901 (age 36) and [his step-daughter] Mary Arabella Arthur Gascoyne-Cecil Countess Galloway 1850-1903 (age 21) were married. She the daughter of James Brownlow William Gascoyne-Cecil 2nd Marquess Salisbury and Mary Catherine Sackville-West Marchioness Salisbury 1824-1900 (age 47). He the son of Randolph Stewart 9th Earl Galloway 1800-1873 (age 72) and Harriet Blanche Somerset Countess Galloway 1811-1885 (age 60). They were third cousin once removed.
In 1876 [his brother-in-law] Mortimer Sackville-West 1st Baron Sackville (age 55) was created 1st Baron Sackville of Knole in Kent with special remainder failing heirs male of his body to his two younger brothers, Lionel Sackville and William Edward respectively in like manner
On 26 Apr 1876 [his mother] Emma Caroline Bootle-Wilbraham Countess Derby 1805-1876 (age 71) died.
In 1884 Edward Henry Stanley 15th Earl of Derby (age 57) was appointed 781st Knight of the Garter by Queen Victoria of the United Kingdom (age 64).
On 01 Oct 1888 [his brother-in-law] Mortimer Sackville-West 1st Baron Sackville (age 68) died. His brother [his brother-in-law] Lionel Sackville-West 2nd Baron Sackville (age 61) succeeded 2nd Baron Sackville of Knole in Kent.
On 21 Apr 1893 Edward Henry Stanley 15th Earl of Derby (age 66) died at Knowsley. His brother [his brother] Frederick Arthur Stanley 16th Earl of Derby (age 52) succeeded 16th Earl Derby, 10th Baronet Stanley of Bickerstaffe. Constance Villiers Countess Derby 1840-1922 (age 53) by marriage Countess Derby.
On 06 Dec 1900 [his former wife] Mary Catherine Sackville-West Marchioness Salisbury 1824-1900 (age 76) died.
Paternal Family Tree: Stanley
Kings Wessex: Great x 24 Grand Son of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 21 Grand Son of Owain "Great" King Gwynedd 1100-1170
Kings Seisyllwg: Great x 27 Grand Son of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 22 Grand Son of Maredudd ap Bleddyn King Powys 1047-1132
Kings England: Great x 15 Grand Son of King Edward III of England
Kings Scotland: Great x 17 Grand Son of Robert "The Bruce" I King Scotland
Kings Franks: Great x 21 Grand Son of Louis VII King Franks
Kings France: Great x 17 Grand Son of Philip "The Fair" IV King France
Great x 4 Grandfather: Thomas Horton Stanley 4th Baronet 9 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Edward Stanley 11th Earl of Derby 10 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Elizabeth Patten
Great x 2 Grandfather: James Stanley "Lord Strange" 11 x Great Grand Son of King Edward III of England
Great x 1 Grandfather: Edward Smith-Stanley 12th Earl of Derby 12 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Hugh Smith of Weald Hall Essex
Great x 2 Grandmother: Lucy Smith
GrandFather: Edward Smith-Stanley 13th Earl of Derby 13 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: James Hamilton Duke Hamilton, 1st Duke Brandon 9 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: James Hamilton 5th Duke Hamilton 2nd Duke Brandon 10 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Elizabeth Gerard Duchess Brandon 1680-1743 10 x Great Grand Daughter of King Edward III of England
Great x 2 Grandfather: James Hamilton 6th Duke Hamilton 3rd Duke Brandon 11 x Great Grand Son of King Edward III of England
Great x 1 Grandmother: Elizabeth Hamilton Countess Derby 12 x Great Grand Daughter of King Edward III of England
Great x 3 Grandfather: John Barnaby Gunning
Great x 2 Grandmother: Elizabeth Gunning Duchess Hamilton and Argyll
Great x 4 Grandfather: Theobald Bourke
Great x 3 Grandmother: Bridget Bourke
Father: Edward Smith-Stanley 14th Earl of Derby 14 x Great Grand Son of King Edward III of England
Edward Henry Stanley 15th Earl of Derby 1826-1893 15 x Great Grand Son of King Edward III of England
GrandFather: Edward Bootle-Wilbraham 1st Baron Skelmersdale
Mother: Emma Caroline Bootle-Wilbraham Countess Derby 1805-1876