Katherine Percy, Countess of Kent

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:


 * Mary Grey (1440–1474);
 * Anthony Grey (1446–1480), married Eleanor Woodville, daughter of Richard Woodville, 1st Earl Rivers;
 * Elizabeth Grey (d. 1472), married Sir Robert Greystoke;
 * Anne Grey (b. 1450), married John Grey, 8th Baron Grey de Wilton;
 * George Grey, 2nd Earl of Kent (1454–1505), married Anne Woodville;
 * John Grey (1455–1484);
 * Edmund Grey (b. 1457).