On 05 Jul 1794 [his father] Henry Conyngham 1st Marquess Conyngham (age 27) and [his mother] Elizabeth Denison Marchioness Conyngham (age 25) were married.

In 1820 Arthur Chichester 1st Baron Templemore (age 22) and [his future sister-in-law] Augusta Paget Baroness Templemore (age 17) were married. She the daughter of Henry William Paget 1st Marquess Anglesey (age 51) and Caroline Elizabeth Villiers Duchess Argyll (age 45).

On 23 Apr 1824 Francis Nathaniel Conyngham 2nd Marquess Conyngham (age 26) and Jane Paget Marchioness Conyngham (age 25) were married. She the daughter of Henry William Paget 1st Marquess Anglesey (age 55) and Caroline Elizabeth Villiers Duchess Argyll (age 49). He the son of Henry Conyngham 1st Marquess Conyngham (age 57) and Elizabeth Denison Marchioness Conyngham (age 55).

On 07 Mar 1829 George Byng 2nd Earl Strafford (age 22) and [his sister-in-law] Agnes Paget (age 25) were married. She the daughter of Henry William Paget 1st Marquess Anglesey (age 60) and Caroline Elizabeth Villiers Duchess Argyll (age 54). He the son of John Byng 1st Earl Strafford (age 57) and Mary Stevens Mackenzie.

On 19 Oct 1833 Edward Crofton 2nd Baron Crofton (age 27) and [his sister-in-law] Georgina Paget Lady Crofton (age 33) were married. She the daughter of Henry William Paget 1st Marquess Anglesey (age 65) and Caroline Elizabeth Villiers Duchess Argyll (age 58).

In 1847 [his brother-in-law] Alfred Paget (age 30) and Cecilia Wyndham were married. She the daughter of George Thomas Wyndham of Cromer Hall Norfolk and Maria Augusta Windham Countess Listowel (age 41). He the son of Henry William Paget 1st Marquess Anglesey (age 78) and Charlotte Cadogan Marchioness Anglesey (age 65).

On 19 May 1849 [his son-in-law] Francis George Spencer 2nd Baron Churchill (age 47) and [his daughter] Jane Conyngham Baroness Churchill (age 22) were married. The difference in their ages was 24 years. She the daughter of Francis Nathaniel Conyngham 2nd Marquess Conyngham (age 51) and Jane Paget Marchioness Conyngham (age 50). He a great x 4 grandson of King Charles II of England Scotland and Ireland.

On 29 Nov 1851 Frederick William Cadogan (age 29) and [his sister-in-law] Adelaide Paget (age 31) were married. She the daughter of Henry William Paget 1st Marquess Anglesey (age 83) and Charlotte Cadogan Marchioness Anglesey (age 70). He the son of George Cadogan 3rd Earl Cadogan (age 68). They were first cousins.

In 1852 [his brother-in-law] Clarence Paget (age 40) and Martha Otway (age 31) were married. He the son of Henry William Paget 1st Marquess Anglesey (age 83) and Charlotte Cadogan Marchioness Anglesey (age 70).

On 27 Feb 1854 [his brother-in-law] General George Augustus Frederick Paget (age 35) and Agnes Charlotte Paget were married. He the son of Henry William Paget 1st Marquess Anglesey (age 85) and Charlotte Cadogan Marchioness Anglesey. They were first cousins.

On 17 Jun 1854 [his son] George Henry Conyngham 3rd Marquess Conyngham (age 29) and [his daughter-in-law] Jane St Maur Blanche Stanhope Marchioness Conyngham (age 21) were married. She the daughter of Charles Stanhope 4th Earl of Harrington and Maria Foote Countess Harrington. He the son of Francis Nathaniel Conyngham 2nd Marquess Conyngham (age 57) and Jane Paget Marchioness Conyngham (age 55). She a great x 4 granddaughter of King Charles II of England Scotland and Ireland.

On 06 Feb 1861 [his brother-in-law] General George Augustus Frederick Paget (age 42) and Louisa Elizabeth Heneage Countess Essex were married. He the son of Henry William Paget 1st Marquess Anglesey and Charlotte Cadogan Marchioness Anglesey. They were first cousin once removed. She a great x 5 granddaughter of King Charles II of England Scotland and Ireland.

On 18 Jul 1861 [his son-in-law] Theodore Brinckman 2nd Baronet (age 30) and [his daughter] Cecilia Augusta Conyngham were married at St George's Church, Hanover Square. She the daughter of Francis Nathaniel Conyngham 2nd Marquess Conyngham (age 64) and Jane Paget Marchioness Conyngham (age 62).