In 1734 Willam Karel Hendrik Friso Orange Nassau (age 22) and [his future sister-in-law] Princess Anne Hanover (age 24) were married at St James's Palace [Map]. She the daughter of King George II of Great Britain and Ireland (age 50) and Caroline Hohenzollern Queen Consort England (age 50). They were fourth cousins.

On 08 May 1740 Frederick Hesse-Kassel (age 19) and Mary Hanover (age 17) were married. She the daughter of King George II (age 56). She the daughter of King George II of Great Britain and Ireland (age 56) and Caroline Hohenzollern Queen Consort England. He the son of William Hesse-Kassel (age 58). They were fourth cousins.

Before 06 Nov 1754 Frederick Eugene Württemberg Duke Württemberg (age 22) and [his future sister-in-law] Friederike Sophie Dorothea Hohenzollern (age 17) were married. She a great granddaughter of King George I of Great Britain and Ireland.

On 27 Sep 1755 Augustus Ferdinand Hohenzollern (age 25) and [his future sister-in-law] Princess Elisabeth Louise Hohenzollern (age 17) were married. He the son of Frederick William "Soldier King" I King Prussia and Sophia Dorothea Hanover Queen Consort Prussia (age 68). They were uncle and niece. He a grandson of King George I of Great Britain and Ireland. She a great granddaughter of King George I of Great Britain and Ireland.

On 01 Sep 1764 [his son] William Elector of Hesse (age 21) and [his daughter-in-law] Electress Wilhelmina Caroline Oldenburg (age 17) were married at Christiansborg Castle. She the daughter of Frederick V King Denmark and Norway (age 41) and Louise Hanover Queen Consort Denmark and Norway. He the son of Frederick Hesse-Kassel (age 44) and Mary Hanover (age 41). They were first cousins. He a grandson of King George II of Great Britain and Ireland. She a granddaughter of King George II of Great Britain and Ireland.

On 30 Aug 1766 [his son] Charles Hesse-Kassel (age 21) and [his daughter-in-law] Louise Oldenburg (age 16) were married at Christiansborg Castle. She the daughter of Frederick V King Denmark and Norway and Louise Hanover Queen Consort Denmark and Norway. He the son of Frederick Hesse-Kassel (age 46) and Mary Hanover (age 43). They were first cousins. He a grandson of King George II of Great Britain and Ireland. She a granddaughter of King George II of Great Britain and Ireland.

On 10 Jan 1773 Frederick Hesse-Kassel (age 52) and Princess Philippine Hohenzollern (age 27) were married. No issue. The difference in their ages was 25 years. He the son of William Hesse-Kassel. They were third cousins. She a great granddaughter of King George I of Great Britain and Ireland.