After 24 Aug 1658 [his father] John Bennet 1st Baron Ossulston (age 42) and Elizabeth Cranfield Countess Mulgrave (age 50) were married. She the daughter of Lionel Cranfield 1st Earl Middlesex and Elizabeth Sheppard.

On 03 Jul 1695 Charles Bennet 1st Earl Tankerville (age 21) and Mary Grey Baroness Ossulston (age 17) were married. She by marriage Baroness Ossulston of Ossulston in Middlesex. She the daughter of Ford Grey 1st Earl Tankerville (age 39) and Mary Berkeley Countess Tankerville.

In 1697 John Cecil 6th Earl Exeter (age 22) and [his sister-in-law] Anabella Grey were married. She the daughter of Ford Grey 1st Earl Tankerville (age 41) and Mary Berkeley Countess Tankerville. He the son of John Cecil 5th Earl Exeter (age 49) and Anne Cavendish Countess Exeter (age 48).

Before Nov 1715 [his son] Charles Bennet 2nd Earl Tankerville (age 17) and [his daughter-in-law] Camilla Colville Countess Tankerville (age 18) were married. He the son of Charles Bennet 1st Earl Tankerville (age 41) and Mary Grey Baroness Ossulston.

On 20 May 1716 [his son-in-law] John Wallop 1st Earl Portsmouth (age 26) and [his daughter] Bridget Bennet Viscountess Lymington (age 19) were married. They had six sons and four daughters. She the daughter of Charles Bennet 1st Earl Tankerville (age 42) and Mary Grey Baroness Ossulston.

On 10 Feb 1721 [his son-in-law] William Paulett (age 28) and [his daughter] Annabella Bennet were married. She the daughter of Charles Bennet 1st Earl Tankerville (age 47) and Mary Grey Baroness Ossulston. They were second cousin once removed.

[his father] John Bennet 1st Baron Ossulston and [his mother] Bridget Howe Baroness Ossulston were married.