Amelia Darcy, 12th Baroness Darcy de Knayth, 9th Baroness Conyers, 5th Countess of Mértola, was born 12 October 1754 to Robert Darcy, 4th Earl of Holderness (1718-1778) and Mary Doublet (c1721-1801) and died 26 January 1784 of unspecified causes. She married Francis Godolphin Osborne, 5th Duke of Leeds (1751-1799) 29 November 1773 in London, England, United Kingdom. She married John Byron (1756-1791) 1 June 1779 in London, England, United Kingdom. Charlemagne (747-814)/s, Henry II of England (1133-1189)/s, Willem van Oranje (1533-1584)/s.
|Offspring of Amelia Darcy and Francis Godolphin Osborne, 5th Duke of Leeds (1751-1799)|
|George William Frederick Osborne, 6th Duke of Leeds (1775-1838)||21 July 1775 London, England, United Kingdom||10 July 1838 London, England, United Kingdom||Charlotte Townshend (1776-1856)|
|Mary Henrietta Juliana Osborne (1776-1862)|
|Francis Godolphin Osborne, 1st Baron Godolphin (1777-1850)||18 October 1777||15 February 1850||Elizabeth Charlotte Eden (1780-1847)|
|Offspring of Amelia Darcy and John Byron (1756-1791)|
|Augusta Byron (c1784-1851)|