Benedicta Knyvett

Died unmarried.

From http://our-royal-titled-noble-and-commoner-ancestors.com/p915.htm#i...

 Alice Grey was born circa 1435 at of Barwell, Leicestershire, England.3,2 She married Sir William Knyvett, Sheriff of Norfolk & Suffolk, Burgess of Melcombe, Bletchingley, & Grantham, Constable of Rising Castle, son of John Knyvet, Esq., Justice of the Peace for Cambridgeshire, Huntingdonshire, & Norfolk and Alice Lynne, circa 1455; They had 1 son (Sir Edmund) and 3 daughters (Bennet; Anne, wife of John Thwaites, Esq; & Elizabeth). Alice Grey died on 4 April 1474; Buried at Buckenham, Norfolk.