On 02 Jan 1766 [his father] Henry Somerset 5th Duke Beaufort (age 21) and [his mother] Elizabeth Boscawen Duchess Beaufort (age 18) were married. She by marriage Duchess Beaufort. He the son of Charles Noel Somerset 4th Duke Beaufort and Elizabeth Berekeley Duchess Beaufort (age 53).

On 05 Feb 1784 Archbishop Edward Venables-Vernon-Harcourt (age 26) and [his future sister-in-law] 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 16 May 1791 Henry Charles Somerset 6th Duke Beaufort (age 24) and 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).

On 30 Jan 1797 William Eliot 2nd Earl St Germans (age 29) and [his sister-in-law] 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.

On 25 Jul 1814 [his son] Henry Somerset 7th Duke Beaufort (age 22) and [his daughter-in-law] Georgiana Frederica Fitzroy (age 21) were married at Upper Brook Street. Following her death in 1821 he would marry her younger half-sister Emily Frances Smith Duchess Beaufort (age 14). An example of a man marrying two sisters, albeit in this case half-sisters. He the son of Henry Charles Somerset 6th Duke Beaufort (age 47) and Charlotte Sophia Leveson-Gower Duchess Beaufort (age 43). They were fourth cousins. She a great x 4 granddaughter of King Charles II of England Scotland and Ireland.

In 1822 [his son] Granville Charles Henry Somerset (age 29) and [his daughter-in-law] Emily Smith were married. He the son of Henry Charles Somerset 6th Duke Beaufort (age 55) and Charlotte Sophia Leveson-Gower Duchess Beaufort (age 50).

On 29 Jun 1822 [his son] Henry Somerset 7th Duke Beaufort (age 30) and [his daughter-in-law] Emily Frances Smith Duchess Beaufort (age 22) were married. She being the younger half-sister of his first wife Georgiana Frederica Fitzroy both of whom's mother was Anne Wellesley (age 54) sister of Arthur Wellesley 1st Duke Wellington (age 53). An example of a man marrying two sisters, albeit in this case half-sisters. He the son of Henry Charles Somerset 6th Duke Beaufort (age 55) and Charlotte Sophia Leveson-Gower Duchess Beaufort (age 51).

On 12 Aug 1823 [his son-in-law] Frederick Gough 4th Baron Calthorpe (age 33) and [his daughter] Charlotte Sophia Somerset 4th Baroness Calthorpe (age 28) were married. She the daughter of Henry Charles Somerset 6th Duke Beaufort (age 56) and Charlotte Sophia Leveson-Gower Duchess Beaufort (age 52).

On 30 May 1825 [his son-in-law] Granville Dudley Ryder (age 25) and [his daughter] Georgiana Augusta Somerset (age 24) were married. She the daughter of Henry Charles Somerset 6th Duke Beaufort (age 58) and Charlotte Sophia Leveson-Gower Duchess Beaufort (age 54). He the son of Dudley Ryder 1st Earl of Harrowby (age 62) and Susanna Leveson-Gower Countess Harrowby Lincolnshire (age 52). They were first cousins.

On 08 Apr 1828 [his son-in-law] Colonel Thomas Henry Kingscote of Kingscote Park in Gloucestershire (age 29) and [his daughter] Isabella Somerset Anne Frances (age 19) were married at Badminton, Gloucestershire. She died three years later in childbirth. She the daughter of Henry Charles Somerset 6th Duke Beaufort (age 61) and Charlotte Sophia Leveson-Gower Duchess Beaufort (age 57).

On 11 May 1830 [his son-in-law] George Cholmondeley 2nd Marquess Cholmondeley (age 38) and [his daughter] Susan Carolina Somerset Marchioness Cholmondeley (age 26) were married. She by marriage Marchioness Cholmondeley. She the daughter of Henry Charles Somerset 6th Duke Beaufort (age 63) and Charlotte Sophia Leveson-Gower Duchess Beaufort (age 59). He the son of George Cholmondeley 1st Marquess Cholmondeley and Georgina Charlotte Bertie Marchioness Cholmondeley (age 68).

On 22 Oct 1832 [his son-in-law] George Finch (age 38) and [his daughter] Louisa Elizabeth Somerset (age 26) were married. She the daughter of Henry Charles Somerset 6th Duke Beaufort (age 65) and Charlotte Sophia Leveson-Gower Duchess Beaufort (age 61). He the illegitmate son of George Finch 9th Earl Winchilsea 4th Earl Nottingham.

On 09 Aug 1833 [his son-in-law] Randolph Stewart 9th Earl Galloway (age 33) and [his daughter] Harriet Blanche Somerset Countess Galloway (age 21) were married. She the daughter of Henry Charles Somerset 6th Duke Beaufort (age 66) and Charlotte Sophia Leveson-Gower Duchess Beaufort (age 62). He the son of George Stewart 8th Earl Galloway (age 65) and Jane Paget Countess Galloway (age 58). They were second cousins.

Edward O'Brien and [his daughter] Elizabeth Susan Somerset were married. She the daughter of Henry Charles Somerset 6th Duke Beaufort and Charlotte Sophia Leveson-Gower Duchess Beaufort.