Isabel Marshal was born 9 October 1200 to William Marshal, 1st Earl of Pembroke (1146-1219) and Isabel de Clare, 4th Countess of Pembroke (1172-1220) and died 17 January 1240 of unspecified causes. She married Gilbert de Clare, 5th Earl of Hertford (1180-1230) 8 October 1217 JL . She married Richard Plantagenet, 1st Earl of Cornwall (1209-1272) 30 March 1231 JL . Charlemagne (747-814)/s, Hugh Capet (c940-996)/s.


Offspring of Gilbert de Clare and Isabel Marshal (1200-1240)
Name Birth Death Joined with
Agnes de Clare (1218-)
Amice de Clare (1220-1287)
Richard de Clare, 6th Earl of Hertford (1222-1262) 4 August 1222 15 July 1262 Megotta de Burgh Megotta de Burgh Maud de Lacy, Countess of Lincoln (1223-c1287)
Isabel de Clare (1226-1264) 2 November 1226 10 July 1264 Robert de Brus (c1210-1295)
William de Clare (1228-1258)
Gilbert de Clare (1229-)



Offspring of Richard of Cornwall and Isabel Marshal (1200-1240)
Name Birth Death Joined with
Henry of Almain (1235-1271)


Footnotes (including sources)

‡ General