Richard, Earl of Hereford de Clare {M} [P67] = Amicia of, Countess of Gloucester Gloucester {F} [P71]

Married 1180
Richard, Earl of Hereford de Clare:

Born 1153
Died 1217
Inherited the title Earl of Gloucester from his wife, and passed it down to his son on his death in 1217.

Amicia of, Countess of Gloucester Gloucester:

Alias de Clare

Gilbert de Clare¹ {M} [P72] = Isabella, Lady Marshal {F} [P98] > Family [F26]

Married Monday 9 October 1217, Tewkesbury Abbey
Gilbert de Clare:

Born 1180
Died Friday 25 October 1230, Penros, Brittany
Buried Tewkesbury
7th Earl of Clare, 6th Earl of Hertford and 5th Earl of Gloucester.

Some sources say married Isabella 1214

Chronology

1215 among twenty five barons appointed to carry out Magna Carta
1216 excommunicated by Innocent III
1217 succeeded his father in the earldom of Hertford
1217 inherited, through his mother, the earldom of Gloucester
1228 fought against the Welsh
1230 attended Henry III to Brittany

Isabella, Lady Marshal:

Alias de Clare
Alias Isabella, Lady Cornwall
Born Monday 9 October 1200, Pembroke Castle, Wales
Died Tuesday 17 January 1240, Berkhamsted Castle, Herts
Buried Beaulieu Abbey, Hampshire
Some say Isabella died on the 15th Jan. She died in childbirth.

Richard (Roger) de Clare {M} [P73]

Died 1228

Matilda de Clare {F} [P74] = Rhys Gryg {M} [P124] > Family [F34]

Married 1219
Matilda de Clare:

Alias Matilda Gryg (1219)

= William de Braose {M} [P125] > Family [F35]

1 : "The Complete Peerage"; Page Vol v. pp 694-6; Secondary evidence
1a: "The Dictionary of National Biography Volume VI"; Page 378; Secondary evidence