Lady Isabel Seymour

 Isabel William was the daughter of Mark William. She married John Seymour, son of Roger Seymour and Maud Esturney, on 30 July 1424. She died on 14 April 1486.1

     Her married name became Seymour. Child of Isabel William and John Seymour John Seymour+ d. c 1463

22. Benolt's Visitation of Wilts, 1532 {Add. MS. 12, 479, British Museum), cited in Wiltshire Notes and Queries, ii. p. 304; Vincent, art. "A Bristol Ancestor of the Dukes of Somerset," The Genealogist, new ser., vol. 12, pp. 73-5, who conclusively shows the error of the old pedigrees in referring to this Isabel as daughter of Mac Williams. He cites papers in a suit of law [De Banco (659) Mich. 4 Hen. VI m. 437, Thomas Stamford vs. John Borton] which show that on 30 July 1424 Isabel, daughter and sole heir of Mark Williams, Mayor of Bristol," and of his wife Agnes, married John Seymour, identified by Leland, after him by Morant (Essex, ii. 356), and by the old Seymour pedigrees as Sir John Seymour of Even Swindon in Wiltshire. Vincent gives 14 April 1485 as the date of death of Isabel, widow of Sir John Seymour, ascertained from several inquisitions post mortem (2 Ric. Ill No. 38), at which time she was seized of the properties mentioned above. He also cites huj. p. m. 19 Edw. IV No. 38 in evidence that her heir was her grandson, "John Seymour of Wolfhale in Wilts, Esquire," at the time of her death aged 34, his father and mother having predeceased Dame Isabel Seymour ; his father, John Seymour, also of Wolfhale, having died 29 Sept. 1463, and his mother, Elizabeth, having died 19 April 1472. Citations [S1916] Tim Boyle, "re: Boyle Family," e-mail message to Darryl Roger Lundy, 16 September 2006. Hereinafter cited as "re: Boyle Family."