Lady Katherine Percy (18 May 1423 – c. 1475) was the daughter of Henry Percy, 2nd Earl of Northumberland, and Lady Eleanor Neville.
Her maternal grandparents were Ralph Neville, 1st Earl of Westmorland and his second wife Joan Beaufort, a legitimized daughter of John of Gaunt.
She married Edmund Grey, 1st Earl of Kent, and had seven children: This English biographical article is a stub.
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