8th Baron of Wigmore and 1st Earl of March (circa 1287–1330), English noble. In 1326 he invaded England with his lover Isabella of France, replacing her husband Edward II with her son, the future Edward III. When Edward III assumed royal power in 1330 he had Mortimer executed.
Mortimer, Roger de in other Oxford dictionaries
Definition of Mortimer, Roger de in the US English dictionary