4th Earl of Hertford Gilbert de Clare and Isabel Marshal Family
m. 9 Oct 1217
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Male
4th Earl of Hertford Gilbert de Clare
Birth Abt 1180 Death 25 Oct 1230 Penros, Brittany, France 
Burial Marriage 9 Oct 1217 [1] Father 3rd Earl of Hertford Sir Richard de Clare | F1340 Group Sheet Mother Amice of Gloucester | F1340 Group Sheet
Female
Isabel Marshal
Birth 9 Oct 1200 Pembroke Castle, Pembroke, Pembrokeshire, Wales Death Burial Father 1st Earl of Pembroke William Marshal | F1338 Group Sheet Mother 4th Countess of Pembroke Isabel de Clare | F1338 Group Sheet
Male
2nd Earl of Gloucester Sir Richard de Clare
Birth 4 Aug 1222 Death Jul 1262 Burial Spouse Countess of Gloucester and Hertford Maud de Lacy | F1120 Marriage Abt [J] 25 Jan 1238
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Sources - [S0491] Douglas Richardson, Ed. by Kimball G. Everingham, Magna Carta Ancestry, (2011), Clare; Vol. 1, pages 446-474.
- [S0491] Douglas Richardson, Ed. by Kimball G. Everingham, Magna Carta Ancestry, (2011), Clare; Vol. 1, pages 446-474.