This is the article for her from The Peerage, "Lady Amelia Darcy was born on 12 October 1754. She was the daughter of Robert Darcy, 4th Earl of Holderness and Mary Doublet. She married, firstly, Francis Godolphin Osborne, 5th Duke of Leeds, son of Thomas Osborne, 4th Duke of Leeds and Lady Mary Godolphin, on 29 November 1773 at London, England. She and Francis Godolphin Osborne, 5th Duke of Leeds were divorced in May 1779. She married, secondly, Captain John Byron, son of Admiral Hon. John Byron and Sophia Trevannion, on 1 June 1779 at London, England. She died on 26 January 1784 at age 29.
From 29 November 1773, her married name became Osborne. She succeeded to the title of 12th Baroness Darcy de Knayth on 16 May 1778, de jure. She succeeded to the title of 9th Baroness Conyers on 16 May 1778, de jure. From 1 June 1779, her married name became Byron."