In 1755 [her father] Walter Smythe (age 34) and [her mother] Mary Ann Errington (age 20) were married.

In Jul 1775 Edward Weld (age 3) and Maria Anne Smythe aka "Mrs Fitzherbert" (age 18) were married. He died three months later.

On 24 Jun 1778 Thomas Fitzherbert (age 31) and Maria Anne Smythe aka "Mrs Fitzherbert" (age 21) were married.

On 15 Dec 1785 King George IV of Great Britain and Ireland (age 23) and Maria Anne Smythe aka "Mrs Fitzherbert" (age 29) were married. The marriage was invalid under English civil law because his father had not given his consent. Her uncle Henry Errington and her brother John Smythe were witnesses. The ceremony was performed by one of the prince's Chaplains in Ordinary, the Reverend Robert Burt, whose debts of £500 were paid by the prince to release him from Fleet Prison [Map]. He the son of King George III of Great Britain and Ireland (age 47) and Charlotte Mecklenburg Strelitz Queen Consort England (age 41).

On 29 Sep 1791 [her brother-in-law] Prince Frederick Hanover Duke York of York (age 28) and Frederica Charlotte Hohenzollern (age 24) were married at Charlottenburg, Berlin. She the daughter of Frederick William II King Prussia (age 47) and Crown Princess Elisabeth Christine of Prussia (age 44). He the son of King George III of Great Britain and Ireland (age 53) and Charlotte Mecklenburg Strelitz Queen Consort England (age 47). They were third cousins. She a great x 2 granddaughter of King George I of Great Britain and Ireland.

On 08 Apr 1795 [her husband] King George IV of Great Britain and Ireland (age 32) and Caroline of Brunswick Queen Consort England (age 26) were married at Chapel Royal, St James's Palace. He the son of King George III of Great Britain and Ireland (age 56) and Charlotte Mecklenburg Strelitz Queen Consort England (age 50). They were first cousins. She a great granddaughter of King George II of Great Britain and Ireland.

On 18 May 1797 King Frederick Wilhelm Karl Württemberg (age 42) and [her illegitimate sister-in-law] Princess Charlotte Hanover (age 30) were married. She the illegitmate daughter of King George III of Great Britain and Ireland (age 58) and Charlotte Mecklenburg Strelitz Queen Consort England (age 52). They were third cousins. He a great x 2 grandson of King George I of Great Britain and Ireland.

On 21 Sep 1808 Charles Cavendish-Bentinck (age 27) and [her step-daughter] Georgiana Augusta Frederica Seymour (age 26) were married. She the daughter of King George IV of Great Britain and Ireland (age 46) and Grace Elliott. He the son of William Cavendish-Bentinck 3rd Duke Portland (age 70) and Dorothy Cavendish 3rd Duchess Portland.