On 13 Mar 1712 [his father] John Leveson-Gower 1st Earl Gower (age 17) and [his mother] Evelyn Pierrepont Baroness Gower (age 21) were married. She by marriage Baroness Gower. She the daughter of Evelyn Pierrepont 1st Duke Kingston upon Hull (age 57) and Mary Fielding Countess Kingston upon Hull. They were fourth cousins.

On 31 Oct 1733 [his father] John Leveson-Gower 1st Earl Gower (age 39) and [his step-mother] Penelope Stonhouse Baroness Gower (age 28) were married. She by marriage Baroness Gower.

On 16 May 1736 [his father] John Leveson-Gower 1st Earl Gower (age 41) and [his step-mother] Mary Tufton Countess Gower were married. She by marriage Baroness Gower. She the daughter of Thomas Tufton 6th Earl of Thanet and Catherine Cavendish Countess Isle Thanet. They were fourth cousins.

In 1744 Granville Leveson-Gower 1st Marquess Stafford (age 22) and Elizabeth Fazakerley were married. He the son of John Leveson-Gower 1st Earl Gower (age 49) and Evelyn Pierrepont Baroness Gower.

In 1748 Granville Leveson-Gower 1st Marquess Stafford (age 26) and Louisa Egerton Countess Gower (age 24) were married. She the daughter of Scroop Egerton 1st Duke Bridgewater and Rachel Russell Duchess Bridgewater (age 41). He the son of John Leveson-Gower 1st Earl Gower (age 53) and Evelyn Pierrepont Baroness Gower.

On 09 Mar 1753 Frederick Calvert 6th Baron Baltimore (age 22) and [his sister-in-law] Diana Egerton Baroness Baltimore (age 22) were married. She by marriage Baroness Baltimore of Longford in Leinster. She the daughter of Scroop Egerton 1st Duke Bridgewater and Rachel Russell Duchess Bridgewater (age 46). He a great x 2 grandson of King Charles II of England Scotland and Ireland.

In 1768 Granville Leveson-Gower 1st Marquess Stafford (age 46) and Susanna Stewart Marchioness Stafford were married. She by marriage Countess Gower. She the daughter of Alexander Stewart 6th Earl Galloway (age 74) and Catherine Cochrane Countess Galloway (age 59). He the son of John Leveson-Gower 1st Earl Gower and Evelyn Pierrepont Baroness Gower.

On 22 Mar 1770 [his son-in-law] Frederick Howard 5th Earl Carlisle (age 21) and [his daughter] Margaret Caroline Leveson-Gower Countess Carlisle were married. She by marriage Countess Carlisle. She the daughter of Granville Leveson-Gower 1st Marquess Stafford (age 48) and Louisa Egerton Countess Gower. He the son of Henry Howard 4th Earl Carlisle and Isabella Byron Countess Carlisle (age 48).

On 05 Feb 1784 [his son-in-law] Archbishop Edward Venables-Vernon-Harcourt (age 26) and [his daughter] Anne Leveson-Gower (age 23) were married. She the daughter of Granville Leveson-Gower 1st Marquess Stafford (age 62) and Louisa Egerton Countess Gower.

On 04 Sep 1785 [his son] George Granville Leveson-Gower 1st Duke Sutherland (age 27) and [his daughter-in-law] Elizabeth Sutherland Duchess Sutherland 19th Countess Sutherland (age 20) were married. He by marriage Earl Sutherland. She the daughter of William Sutherland 18th Earl Sutherland. He the son of Granville Leveson-Gower 1st Marquess Stafford (age 64) and Louisa Egerton Countess Gower.

On 16 May 1791 [his son-in-law] Henry Charles Somerset 6th Duke Beaufort (age 24) and [his daughter] Charlotte Sophia Leveson-Gower Duchess Beaufort (age 20) were married at St Mary's Church Lambeth Palace [Map]. She the daughter of Granville Leveson-Gower 1st Marquess Stafford (age 69) and Susanna Stewart Marchioness Stafford. He the son of Henry Somerset 5th Duke Beaufort (age 46) and Elizabeth Boscawen Duchess Beaufort (age 43).

In 1795 [his son-in-law] Dudley Ryder 1st Earl of Harrowby (age 32) and [his daughter] Susanna Leveson-Gower Countess Harrowby Lincolnshire (age 22) were married. She the daughter of Granville Leveson-Gower 1st Marquess Stafford (age 73) and Susanna Stewart Marchioness Stafford.

On 30 Jan 1797 [his son-in-law] William Eliot 2nd Earl St Germans (age 29) and [his daughter] Georgiana Augusta Leveson-Gower (age 27) were married at Trentham, Staffordshire. She the daughter of Granville Leveson-Gower 1st Marquess Stafford (age 75) and Susanna Stewart Marchioness Stafford.