Edmund de Mortimer, 3rd Earl of March & Phillipa Plantagenet, Countess of Ulster 
Edmund and Phillipa were married about May 1368 in Reading Abbey, Queen's Chapel, Reading, Berkshire, England. They had a son and two daughters, named Roger, Elizabeth and Phillipa.
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Personal Details
Edmund de Mortimer, 3rd Earl of March
Edmund was born on February 1st, 1352. He died at the age of 29 on December 27th, 1381.
Phillipa Plantagenet, Countess of Ulster
Phillipa was born on August 16th, 1355. She died about January 5th, 1381.
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Children
Elizabeth de Mortimer
Elizabeth was born on February 12th, 1371 in Usk, Monmouthshire, Wales. She died at the age of 46 on April 20th, 1417. She was buried in Trotton, Sussex, England.
Roger de Mortimer, 4th Earl of March
Roger was born on April 11th, 1374 in Usk, Monmouthshire, Wales. He died at the age of 24 on July 20th, 1398. He was buried in Wigmore, Herefordshire, England.
Phillipa de Mortimer
Phillipa was born on November 21st, 1375. She died at the age of 25 on September 24th, 1401.