Family: Thomas Berkeley, 3d Baron Berkeley / Margaret de Mortimer, Baroness Berkeley (F3100)
m. 1320-
Father | Male
Thomas Berkeley, 3d Baron Berkeley
Born Abt 1293 Berkeley Castle, Gloucestershire 
Died 27 Oct 1361 Berkeley Castle, Gloucestershire Buried Married 1320 [1] Father Maurice de Berkeley, 2d Baron Berkeley | F2592 Group Sheet Mother Eve la Zouche | F2592 Group Sheet
Mother | Female
Margaret de Mortimer, Baroness Berkeley
Born 2 May 1304 Died 5 May 1337 Buried Bristol Cathedral, Bristol, Glouchester Father Roger V de Mortimer, 1st Earl of March | F3101 Group Sheet Mother Joan de Geneville, 2nd Baroness Geneville | F3101 Group Sheet
Child 1 | Male
+ Maurice "the Valiant" Berkeley, 4th Baron Berkeley
Born Abt 1330 Berkeley Castle, Gloucestershire Died 8 Jun 1368 Berkeley Castle, Gloucestershire Buried Bristol Cathedral, Bristol, Glouchester Spouse Elizabeth le Despenser | F3082 Married Abt 1338
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Notes Married:
- "Afterwards, in May, Roger [de Mortimer] also probably attended the marriage of his eldest daughter Margaret with Thomas, the son and heir of Lord Berkeley, which secured an earlier alliance with an important lord of the Welsh Marches. Interestingly Berkeley and his adherent John Maltravers and Thomas Gurney had fallen out with the Earl of Pembroke [Aymer de Valence] at this time, and Berkeley's move towards Roger was a long-term political shift, not a mere interweaving of alliances but a vote of confidence in him as a leader." [2]
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