This individual has the following other parents in the Ancestral File: Edmund De /MORTIMER/ (AFN:8HRJ-M5) and Margaret /DE FIENNES/ (AFN:HNJG-GV)99
Hart Family Genealogy website, Title: 1st Earl of March.
Was a very powerful and ambitious Marcher Lord. He was the first of several members of his family to attempt to seize the throne of England. He fought the Scottish Wars and made attempts to remove the King's favorites, at first with some success. In 1323 he was imprisoned in the Tower of London, but escaped to France, an event he later commemorated by building St Peter's chapel in the outer bailey of Ludlow Castle .
In France, Mortimer formed an alliance with Queen Isabella , who had deserted her effeminate husband, King Edward II of England. They raised an army, invaded England and forced Edward to abdicate in favor of his youngest son, the future Edward III. Mortimer entertained Isabella at his castles on the Welsh borders and they became famous lovers. Meanwhile, Edward II was cruelly murdered at Berkeley Castle in 1327.
Following Edward's death, Mortimer, acting as regent, was the virtual ruler of England, but he over-reached himself and aroused the anger of other barons. In October 1330 he was arrested at Nottingham and sentenced to death. He was executed at Tyburn in London.
Later, the ambitions of the Mortimers became part of the great dynastic struggles of the mid-15th century which became known as the "War of the Roses."
In 1330, Sir William Eland conducted King Edward through a passage in Nottingham Castle when he seized Lord Mortimer, and brought him out of the castle. This was afterwards called Mortimer's Hole, in memory of that unfortunate nobleman, a name which is erroneously given to the principal vault.356