Tags: Noble.
Katherine Mortimer Countess of Warwick (1314 – 4 August 1369) was the wife of Thomas de Beauchamp 11th Earl of Warwick KG an English peer and military commander during the Hundred Years War. She was a daughter and co-heiress of Roger Mortimer 1st Earl of March and Joan de Geneville Baroness Geneville.Sometime before 1355 she became an important figure at the royal court of King Edward III.