Elizabeth Mortimer, Baroness Camoys

http://en.wikipedia.org/wiki/Elizabeth_Mortimer

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Elizabeth Mortimer, Baroness Camoys, was an English noblewoman, who, as the granddaughter of Lionel of Antwerp, 1st Duke of Clarence, and great-granddaughter of King Edward III, was in the line of succession to the English crown. Her first husband was Sir Henry Percy, known to history as 'Hotspur'. She married secondly Thomas de Camoys, 1st Baron Camoys. She is represented as 'Kate, Lady Percy,' in Shakespeare's Henry IV, Part 1, and briefly again as 'Widow Percy' in Henry IV, Part 2.

References

• ”Memorials of an ancient house : a history of the family of Lister or Lyster.” Author: Denny, Henry Lyttelton Lyster, 1878-. Page 125. Archive.Org