On 31 Aug 1676 [his father] Thomas Bruce 3rd Earl Elgin 2nd Earl Ailesbury (age 20) and [his mother] Elizabeth Seymour Countess Elgin and Ailesbury (age 21) were married. She the daughter of Henry Seymour and Mary Capell Duchess Beaufort (age 45). He the son of Robert Bruce 2nd Earl Elgin 1st Earl Ailesbury (age 50). They were fourth cousins. She a great x 5 granddaughter of King Henry VII of England and Ireland.

On 27 Apr 1700 [his father] Thomas Bruce 3rd Earl Elgin 2nd Earl Ailesbury (age 44) and [his step-mother] Charlotte Argenteau Countess Elgin and Ailesbury (age 21) were married at Brussels [Map]. She by marriage Countess Elgin, Countess Ailesbury. The difference in their ages was 22 years. He the son of Robert Bruce 2nd Earl Elgin 1st Earl Ailesbury.

Before 1717 Charles Bruce 4th Earl Elgin 3rd Earl Ailesbury (age 34) and Anne Savile (age 25) were married. She the daughter of William Savile 2nd Marquess Halifax and Elizabeth Grimston. He the son of Thomas Bruce 3rd Earl Elgin 2nd Earl Ailesbury (age 60) and Elizabeth Seymour Countess Elgin and Ailesbury.

In Jul 1717 Charles Bruce 4th Earl Elgin 3rd Earl Ailesbury (age 35) and Juliana Boyle (age 20) were married. She the daughter of Charles Boyle 2nd Earl Burlington and Juliana Noel Countess Burlington (age 45). He the son of Thomas Bruce 3rd Earl Elgin 2nd Earl Ailesbury (age 61) and Elizabeth Seymour Countess Elgin and Ailesbury. They were second cousins.

On 28 Aug 1719 Henry Arundell Bedingfeld 3rd Baronet and [his sister-in-law] Elizabeth Boyle (age 29) were married. She the daughter of Charles Boyle 2nd Earl Burlington and Juliana Noel Countess Burlington (age 47).

In 1726 Henry Boyle 1st Earl Shannon (age 44) and [his sister-in-law] Henrietta Boyle (age 25) were married. She the daughter of Charles Boyle 2nd Earl Burlington and Juliana Noel Countess Burlington (age 54). They were second cousin once removed.

On 21 Dec 1728 [his son-in-law] Henry Brydges 2nd Duke Chandos (age 20) and [his daughter] Mary Bruce (age 18) were married. She the daughter of Charles Bruce 4th Earl Elgin 3rd Earl Ailesbury (age 46) and Anne Savile. He the son of James Brydges 1st Duke Chandos (age 55) and Mary Lake.

In 1732 [his son-in-law] Benjamin Bathurst and [his daughter] Elizabeth Bruce were married. She the daughter of Charles Bruce 4th Earl Elgin 3rd Earl Ailesbury (age 49) and Anne Savile. He the son of Allen Bathurst 1st Earl Bathurst (age 47) and Catherine Apsley Countess Bathurst Sussex.

In Mar 1739 Charles Bruce 4th Earl Elgin 3rd Earl Ailesbury (age 56) and Caroline Campbell Countess Elgin and Ailesbury (age 18) were married. The difference in their ages was 38 years. She the daughter of John Campbell 4th Duke Argyll (age 46) and Mary Drummond Bellenden. He the son of Thomas Bruce 3rd Earl Elgin 2nd Earl Ailesbury (age 83) and Elizabeth Seymour Countess Elgin and Ailesbury.

On 19 Dec 1747 Field Marshal Henry Seymour-Conway (age 26) and [his former wife] Caroline Campbell Countess Elgin and Ailesbury (age 26) were married. She the daughter of John Campbell 4th Duke Argyll (age 54) and Mary Drummond Bellenden.

[his son] Robert Bruce and Frances Blackett were married. He the son of Charles Bruce 4th Earl Elgin 3rd Earl Ailesbury and Anne Savile.