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Birth:          2 May 1304 
Death:          5 May 1337 

Notes
www.tudorplace.com.ar/GREY1.htm
https://en.wikipedia.org/wiki/Margaret_Mortimer,_Baroness_Berkeley
Margaret Mortimer, Baroness Berkeley (2 May 1304 – 5 May 1337) was the wife of 
Thomas de Berkeley, 3rd Baron Berkeley. She was the eldest daughter of Roger 
Mortimer, 1st Earl of March, the de facto ruler of England from 1327 to 1330, and his 
wife Joan de Geneville, Baroness Geneville.[1]
Family[edit]

Margaret Mortimer was the eldest of the twelve children of Roger Mortimer, 1st Earl of 
March and Joan de Geneville, Baroness Geneville. Her paternal grandparents were 
Edmund Mortimer, 2nd Baron Mortimer and Margaret de Fiennes. Her maternal 
grandparents were Piers de Geneville, of Trim Castle and Ludlow, and Jeanne of 
Lusignan.

Marriage and death[edit]

Her father Roger proposed the marriage of his eldest daughter Margaret to Maurice de 
Berkeley, 2nd Baron Berkeley's son and heir Thomas. From Roger's point of view, the 
marriage was meant to secure an earlier alliance with an important lord of the Welsh 
Marshes.[2] Margaret was duly married to Thomas de Berkeley in May 1319.[1] He 
succeeded his father as 3rd Baron Berkeley in 1326.[2] They had the following issue:
Maurice de Berkeley (born 1320, date of death unknown), who succeeded his father 
as Baron de Berkeley.
Thomas de Berkeley, (born c. 1325, date of death unknown)
Roger de Berkeley (born 1326, date of death unknown)
Alphonsus de Berkeley (born 1327, date of death unknown)
Joan de Berkeley (born 1330 - 1369), married Sir Reginald Cobham.
John de Berkeley (born 1326)

Their eldest son Maurice married Elizabeth le Despenser, despite the fact that it had 
been his grandfather Roger Mortimer that was namely responsible for the execution of 
Elizabeth's father Hugh le Despenser in 1326.

Later life[edit]

After her father's fall from power in 1322, Margaret was arrested.[1] In 1324, she was 
sent to Sholdham Priory. Her marriage to Berkeley was confirmed, and her offspring 
declared legitimate by Pope John XXII in 1329.[1]

Margaret died on 5 May 1337. She was buried at St. Augustine's Abbey, Bristol, 
Gloucestershire.[1] After her death, her husband remarried to Catherine Clivedon.

Parents
DE MORTIMER Roger (3 May 1287 - 29 Nov 1330)
DE GENEVILLE Joan (2 Feb 1286 - 19 Oct 1356)

Siblings
DE MORTIMER Edmund (ABT 1302 - 16 Dec 1331)
DE MORTIMER Margaret (2 May 1304 - 5 May 1337)
DE MORTIMER Joane (ABT 1313 - ABT 1350)
DE MORTIMER Katherine (Catherine) (1314 - 4 Aug 1369)

Marriage To DE BERKELEY Thomas "the Rich" (1293 - 27 Oct 1361)
    m. May 1319 

Notes

Parents
DE BERKELEY Maurice "the Magnanimous" (Apr 1271 - 31 May 1326)
LA ZOUCHE Eve (1273 - 5 Dec 1314)

Children by DE BERKELEY Thomas "the Rich" 1293 - 27 Oct 1361
DE BERKELEY Joan (ABT 1320 - 2 Oct 1369)

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