On 12 Jun 1866 [his father] Francis Teck (age 28) and [his mother] Princess Mary Adelaide Hanover (age 32) were married at St Anne's Church Kew, Surrey. She the daughter of Adolphus Hanover 1st Duke Cambridge and Princess Augusta Hesse-Kassel Duchess Cambridge (age 68). They were third cousin once removed. He a great x 3 grandson of King George II of Great Britain and Ireland. She a granddaughter of King George III of Great Britain and Ireland.

In 1877 Charles Compton Cavendish (age 26) and [his future sister-in-law] Beatrice Constance Grosvenor (age 18) were married. She the daughter of Hugh Lupus Grosvenor 1st Duke Westminster (age 51) and Constance Leveson-Gower Duchess Westminster (age 42). They were second cousins.

On 21 Apr 1887 [his future brother-in-law] Henry George Grosvenor (age 25) and Dora Mina Erskine-Wemyss (age 31) were married. He the son of Hugh Lupus Grosvenor 1st Duke Westminster (age 61) and Constance Leveson-Gower Duchess Westminster. She a great granddaughter of King William IV of the United Kingdom.

In 1893 [his future brother-in-law] Arthur Hugh Grosvenor (age 32) and Helen Sheffield (age 21) were married. He the son of Hugh Lupus Grosvenor 1st Duke Westminster (age 67) and Constance Leveson-Gower Duchess Westminster.

In 1894 Adolphus Cambridge Duke Teck (age 25) and Margaret Evelyn Grosvenor Duchess Teck (age 20) were married at Eaton Hall, Cheshire [Map]. She the daughter of Hugh Lupus Grosvenor 1st Duke Westminster (age 68) and Constance Leveson-Gower Duchess Westminster. He a great grandson of King George III of Great Britain and Ireland.

Before 22 Nov 1907 Henry Crichton (age 35) and [his sister-in-law] Mary Cavendish Grosvenor (age 24) were married. She the daughter of Hugh Lupus Grosvenor 1st Duke Westminster and Katherine Cavendish Duchess Westminster (age 50). He the son of John Crichton 4th Earl Erne (age 68).

On 05 Aug 1914 [his brother-in-law] Edward Arthur Grosvenor (age 21) and Dorothy Margaret Browne (age 26) were married. She the daughter of Valentine Charles Browne 5th Earl of Kenmare (age 53) and Elizabeth Baring Countess Kenmare (age 47). He the son of Hugh Lupus Grosvenor 1st Duke Westminster and Katherine Cavendish Duchess Westminster (age 57).

On 10 Apr 1923 [his son] George Cambridge 2nd Marquess Cambridge (age 27) and [his daughter-in-law] Dorothy Hastings Marchioness Cambridge (age 23) were married. She by marriage Marchioness Cambridge. He the son of Adolphus Cambridge Duke Teck (age 54) and Margaret Evelyn Grosvenor Duchess Teck (age 50). He a great x 2 grandson of King George III of Great Britain and Ireland.

On 14 Jun 1923 [his son-in-law] Henry Hugh Arthur Fitzroy Somerset 10th Duke Beaufort (age 23) and [his daughter] Mary Cambridge Duchess Beaufort (age 26) were married. She by marriage Duchess Beaufort. She the daughter of Adolphus Cambridge Duke Teck (age 54) and Margaret Evelyn Grosvenor Duchess Teck (age 50). He the son of Henry Adelbert Wellington Fitzroy 9th Duke Beaufort (age 76) and Louise Emily Harford 9th Duchess Beaufort (age 58). They were half fourth cousins. She a great x 2 granddaughter of King George III of Great Britain and Ireland.

Hugh William Grosvenor and Mabel Florence Mary Creighton were married. She the daughter of John Crichton 4th Earl Erne. He the son of Hugh Lupus Grosvenor 1st Duke Westminster and Katherine Cavendish Duchess Westminster.

Henry Charles Seymour and Helen Grosvenor were married. She the daughter of Hugh Lupus Grosvenor 1st Duke Westminster and Katherine Cavendish Duchess Westminster. He the son of Hugh de Grey Seymour-Conway 6th Marquess Hertford and Mary Hood Marchioness Hertford.