9 October 1200–17 January 1240 (Age 39)
Pembroke Castle, Pembrokeshire, Wales
When Lady Isabel Marshal Countess Gloucester, Countess Hertford, Countess of Cornwall was born on 9 October 1200, in Pembroke Castle, Pembrokeshire, Wales, her father, Sir William Marshal 1st Earl of Pembroke, was 54 and her mother, Isabel de Clare 4th Countess of Pembroke, was 28. She married Gilbert de Clare on 9 October 1217, in Tewkesbury Abbey, Tewkesbury, Gloucestershire, England, United Kingdom. They were the parents of at least 3 sons and 4 daughters. She died on 17 January 1240, in Berkhamsted, Hertfordshire, England, United Kingdom, at the age of 39, and was buried in Brockenhurst, Hampshire, England.
BIO: from http://fmg.ac/Projects/MedLands/ENGLISH%20NOBILITY%20MEDIEVAL1.htm#IsabelMarshaldied1240 as of 5/29/2016 ISABEL (Pembroke Castle 9 Oct 1200-Berkhamstead Castle, Hertfordshire 15 or 17 Jan …
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