On 16 Sep 1609 [his father] Gilbert Gerard 2nd Baron Gerard and [his mother] Eleanor Dutton (age 12) were married.

After 11 May 1623, the date her first husband [his father] Gilbert Gerard 2nd Baron Gerard died, [his step-father] Robert Needham 2nd Viscount Kilmorey (age 35) and [his mother] Eleanor Dutton (age 26) were married.

After 18 May 1625 Dutton Gerard 3rd Baron Gerard (age 12) and Mary Fane Baroness Gerard (age 19) were married. She by marriage Baroness Gerard of Gerard's Bromley. She the daughter of Francis Fane 1st Earl of Westmoreland (age 45) and Mary Mildmay Countess of Westmoreland (age 43).

On 24 Jun 1627 Charles Cockayne 1st Viscount Cullen (age 24) and [his future sister-in-law] Mary O'Brien Viscountess Cullen (age 18) were married at Church of St Gile's in the Fields. She the daughter of Henry O'Brien 5th Earl Thomond (age 39) and Mary Brereton Countess Thomond (age 47). He the son of William Cockayne and Mary Morris Countess Dover (age 62).

On 14 Feb 1631 John Cope 3rd Baronet (age 22) and [his sister-in-law] Elizabeth Fane (age 23) were married. She the daughter of Francis Fane 1st Earl of Westmoreland and Mary Mildmay Countess of Westmoreland (age 49). They were fourth cousins.

In 1636 [his former brother-in-law] Francis Fane (age 25) and Elizabeth West Baroness Darcy (age 55) were married. The difference in their ages was 30 years; she, unusually, being older than him. He the son of Francis Fane 1st Earl of Westmoreland and Mary Mildmay Countess of Westmoreland (age 54).

On 21 Aug 1636 Dutton Gerard 3rd Baron Gerard (age 23) and Elisabeth O'Brien Baroness Gerard were married. She by marriage Baroness Gerard of Gerard's Bromley. She the daughter of Henry O'Brien 5th Earl Thomond (age 48) and Mary Brereton Countess Thomond (age 56).

After 13 Oct 1638 William Cope (age 26) and [his former sister-in-law] Elizabeth Fane (age 30) were married. She the daughter of Francis Fane 1st Earl of Westmoreland and Mary Mildmay Countess of Westmoreland (age 56).