Elizabeth Bonville was born about 1425, the daughter of William Bonville, KG, and Margaret Grey.
Elizabeth married Sir William Tailboys and her maritagium included property at Somerton and Yeovilton.  They had two sons, Thomas, and Robert, Knight. 
Elizabeth's brother, Sir William Bonville, and her nephew - his son William Bonville, fought for York in the War of the Roses. They were captured and beheaded after the Battle of Wakefield, 31 Dec. 1460, their deaths witnessed by William and Elizabeth's father, Sir William Bonville,  Elizabeth's father was captured and beheaded a few weeks later after the 2nd Battle of St. Albans, 18 Feb. 1460/1. 
Elizabeth's husband was a rebel against King Edward IV, and he fought as a Lancastrian at the 2nd Battle of St. Albans, 19 Feb 1460/1, where he was knighted, and at the Battle of Towton 29 March 1461. 
Sir William Tailboys, Elizabeth's husband, was attainted by act of Parliament 4 Nov 1461 and was beheaded about 26 May 1464, and buried at Grey Friars, Newcastle-upon-Tyne.  His estates were forfeited.