In 1807 [his father] John Savile 3rd Earl Mexborough (age 23) and [his mother] Anne Yorke Countess Mexborough (age 24) were married. She the daughter of Philip Yorke 3rd Earl of Hardwicke (age 49) and Elizabeth Lindsay Countess Hardwicke (age 43). He the son of John Savile 2nd Earl Mexborough (age 45) and Elizabeth Stephenson Countess Mexborough (age 45).

In 1842 John Savile 4th Earl Mexborough (age 31) and Rachel Katherine Walpole (age 18) were married. She the daughter of Horatio Walpole 3rd Earl Orford (age 58) and Mary Fawkener Countess Orford (age 54). He the son of John Savile 3rd Earl Mexborough (age 58) and Anne Yorke Countess Mexborough (age 59).

1847 Reginald Henry Neville (age 39) and [his sister-in-law] Dorothy Walpole (age 20) were married. She the daughter of Horatio Walpole 3rd Earl Orford (age 63) and Mary Fawkener Countess Orford (age 59). They were second cousin once removed.

Before 10 Jul 1854 [his former brother-in-law] Frederick Walpole (age 31) and Laura Sophia Frances Walpole (age 22) were married. He the son of Horatio Walpole 3rd Earl Orford (age 71) and Mary Fawkener Countess Orford (age 66). They were half second cousin once removed.

In Jul 1861 John Savile 4th Earl Mexborough (age 51) and Agnes Louisa Elizabeth Raphael were married at St Mary's Church, Bryanston Square, Marylebone at which time he converted to his wife's Cathloic faith. He the son of John Savile 3rd Earl Mexborough and Anne Yorke Countess Mexborough (age 78).

On 24 Apr 1867 [his son] John Horace Savile 5th Earl Mexborough (age 24) and [his daughter-in-law] Venetia Stanley Errington Countess Mexborough were married. She by marriage Countess Mexborough of Lifford in County Donegal. He the son of John Savile 4th Earl Mexborough (age 56) and Rachel Katherine Walpole.