Joan, daughter of Walter Follot of Whiteford, co. Devon and Melbury Turberville, Dorset. [Magna Charta Sureties]
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He [John Mautravers] married, 2ndly, Joan, widow of Nicholas DE PERCY, who died in 1324, and daughter and heir of Sir Walter FOLIOT, by his wife Ada or Alda, daughter and heir of Sir Laurence DE SAMFORD of Melbury (h). He was living 26 January 1340/1, but dead in June 1341. His widow, who was aged 26 and more in 1330 (k), was heiress (inter alia) of a sixth part of the barony of Nantwich in Cheshire. She married, 3rdly, Sir Alexander DE VENABLES, with whom she nominated attorneys for Ireland 7 September 1342. She died before 11 February 1348/9 (c). [Complete Peerage VIII:579-81, (transcribed by Dave Utzinger)]
(h) By his 2nd wife Sir John had 3 daughters, Alice, Joan and Elizabeth. Joan dsp., but Elizabeth had issue and long survived her mother, though not returned as coheir in the Inq.p.m. quoted in note "c" on following page.
(k) When her mother died. On 16 Mar. 1336/7 William, son of William de Percy, parson of Folke, Dorset, was to be arrested for the abduction of Joan, wife of John Mautravers, the elder.
(c) When the writ to the excheator was issued. Her heirs (as returned in Cheshire) were her two daughters: (i) Joan, her daughter by Nicholas de Percy, then aged 26 and wife of Piers de Brewes; (ii) Alice, her daughter by John Mautravers, then aged 21. As Alice, mother of John Browning, she was living in 1415.
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Note: I originally had Joan's 2nd husband as John's son John who d. 16 Feb 1363/64. Joan is only 15 years younger than the son John, while she is at least 39 years younger than John senior. And she had children by him (three daughters).