Later dubbed The Magnificent by John Smyth of Nibley (d.1641), he was born at Berkeley Castle in Gloucestershire, the son and heir of Maurice de Berkeley, 4th Baron Berkeley by his wife Elizabeth le Despencer.
In 1367 Thomas married Margaret de Lisle, 3rd Baroness Lisle (1360–1392), daughter of Warine de Lisle, 2nd Baron Lisle (d.1382) and Margaret Pipard. By his wife he had no male progeny, only a daughter and sole heiress:
Elizabeth de Lisle (born ca.1386 – 28 December 1422), suo jure Baroness Lisle, who married Richard de Beauchamp, 13th Earl of Warwick (1381–1459).
Arms of Berkeley: Gules, a chevron between ten crosses pattée six in chief and four in base argent
https://en.wikipedia.org/wiki/Thomas_de_Berkeley,_5th_Baron_Berkeley
Margaret de Lisle was born in the little village of Kingston Lisle, to Warin de Lisle, the 2nd Baron de Lisle and Margaret Pypard. At Wingrave Buckinghamshire, in November of 1367 Margaret, age 7, married Thomas Berkeley age 14, the son of Maurice De Berkeley and Elizabeth Despenser. Even though Lord Maurice was very ill and could not travel to his son's marriage, he sent three household Knights suited in liveries of fine cloth of ray fur with miniver, and twenty three of his household Esquires in their liveries of coarser ray and less costly fur. The young bridegroom was in scarlet and satin and a silver girdle. Because of Margaret's age there was an agreement that they would live apart for four years. Margaret was about 22 when her father died (Sir Warin de Lisle, 2nd Lord Lisle, 5th Lord Tyeys died on 28 June 1382.) and about 30 at her step-mother's death, when she became heir to the Lisle and Teyes estates. She died between May and September 1392, and was buried at Wotton-under-Edge. Thomas died 13 July 1417, and was buried at Wotton. The brasses remain, but are without inscription.
https://www.findagrave.com/memorial/84705572/margaret-berkeley
https://www.geni.com/people/Margaret-de-Berkley/6000000000796849001
https://www.wikitree.com/wiki/Lisle-94
Wotton-under-Edge is a market town within the Stroud district of Gloucestershire, England.
In 1272 the inhabitants of the borough were authorised to elect one of their members as a Mayor, a practice that continued every year until 1886.
St. Mary the Virgin was consecrated in 1283, and is the oldest and largest church in the town.
The Katharine Lady Berkeley's Grammar School was established in 1384 and is now a comprehensive named Katharine Lady Berkeley's School although the present modern building is a little outside of the town on the way to the village of Kingswood. The British School was established in the village in 1835.
A battle occurred near the Ancient Ram Inn in 1469, when the building was owned by a Viscount Lisle. William Berkely led the forces that beat the Viscount, and after the battle his men sacked the manor.
https://en.wikipedia.org/wiki/Wotton-under-Edge
