On 29 Nov 1773 [his father] Francis Osborne 5th Duke Leeds (age 22) and [his mother] Amelia Darcy 12th Baroness Darcy 9th Baroness Conyers (age 19) were married. She the daughter of Robert Darcy 4th Earl Holderness (age 55). He the son of Thomas Osborne 4th Duke Leeds (age 60) and Mary Godolphin Duchess Leeds. She a great x 4 granddaughter of King James I of England and Ireland and VI of Scotland.

In 1779 [his step-father] John "Mad Jack" Byron (age 22) and [his mother] Amelia Darcy 12th Baroness Darcy 9th Baroness Conyers (age 24) were married. She the daughter of Robert Darcy 4th Earl Holderness. She a great x 4 granddaughter of King James I of England and Ireland and VI of Scotland.

In 1788 [his father] Francis Osborne 5th Duke Leeds (age 36) and [his step-mother] Catherine Anguish Duchess Leeds (age 23) were married. He the son of Thomas Osborne 4th Duke Leeds (age 74) and Mary Godolphin Duchess Leeds.

On 07 May 1790 General William Loftus (age 38) and [his future sister-in-law] Elizabeth Townshend were married. She the daughter of George Townshend 1st Marquess Townshend (age 66) and Charlotte Compton 16th Baroness Ferrers Chartley 7th Baroness Compton.

On 17 Aug 1797 George William Frederick Osborne 6th Duke Leeds (age 22) and Charlotte Townshend Duchess Leeds (age 21) were married. She by marriage Baroness Darcy of Knayth, Baroness Conyers. She the daughter of George Townshend 1st Marquess Townshend (age 73) and Anne Montgomery Marchioness Townshend (age 45). He the son of Francis Osborne 5th Duke Leeds (age 46) and Amelia Darcy 12th Baroness Darcy 9th Baroness Conyers. He a great x 5 grandson of King James I of England and Ireland and VI of Scotland.

In 1826 [his son-in-law] Sackville Lane-Fox (age 28) and [his daughter] Charlotte Mary Anne Georgiana Osborne (age 20) were married. She the daughter of George William Frederick Osborne 6th Duke Leeds (age 50) and Charlotte Townshend Duchess Leeds (age 49).

On 24 Apr 1828 [his son] Francis Godolphin Osborne 7th Duke Leeds (age 29) and [his daughter-in-law] Louisa Catharine Caton Duchess Leeds (age 35) were married. He the son of George William Frederick Osborne 6th Duke Leeds (age 52) and Charlotte Townshend Duchess Leeds (age 52).

She one of the four Caton sisters, daughters of Richard Caton (age 65), a merchant from Baltimore, the three eldest, known as the "The Three American Graces", married European husbands husbands. Only the fourth daughter Emily Caton (age 33) had children.

Marianne Caton Marchioness Wellesley (age 40) married Richard Wellesley 1st Marquess Wellesley (age 67),

Elizabeth Caton Baroness Stafford (age 38) married George William Stafford-Jerningham 8th Baron Stafford (age 56),

Louisa Catharine Caton Duchess Leeds (age 35) married firstly Felton Elwell Hervey-Bathurst 1st Baronet and secondly Francis Godolphin Osborne 7th Duke Leeds (age 29).

Emily Caton (age 33) married Consul John MacTavish (age 41).