|  Birth - Annales Monastici |  | Originale | Seconde main | Directe | 
		
			|  Birth - Dugdale's Monasticon Anglicanum |  | Originale | Seconde main | Directe | 
		
			|  British History Online |  | Originale | Seconde main | Directe | 
		
			|  Burke's Landed Gentry |  | Originale | Seconde main | Directe | 
		
			|  Complete Peerage |  | Originale | Seconde main | Directe | 
		
			|  England A. K. vol 3 p. 2-7, B.kG. 4 p. 162 |  | Originale | Seconde main | Directe | 
		
			|  England A. K. vol 3 p. 2-7, B.kG. 4 p. 162 |  | Originale | Seconde main | Directe | 
		
			|  Europäische Stammtafeln |  | Originale | Seconde main | Directe | 
		
			|  Foundation for Medieval Genealogy: Matilda la Zouche |  | Originale | Seconde main | Directe | 
		
			|  Gilbert and Richard de Clare, Earls of Pembroke, from Annuals and Antiquities, vol. 2, page 867 [See document in the Memories section] |  | Originale | Seconde main | Directe | 
		
			|  Gilbert and Richard de Clare, Earls of Pembroke, in Burke's A Genealogical History of the Dormant, Abeyant, Forfeited and Extinct Peerages, pgs. 120-121 [See document in the Memories section] |  | Originale | Seconde main | Directe | 
		
			|  Héraldique européenne |  | Originale | Seconde main | Directe | 
		
			|  Heraldry Coat of Arms |  | Originale | Seconde main | Directe | 
		
			|  Hubert de Vaux II in The Early History of the Stricklands of Sizergh, pgs. 20-22 [See document in the Memories section] |  | Originale | Seconde main | Directe | 
		
			|  Hubert de Vaux in the Foundation for Medieval Genealogy ~ http://fmg.ac/Projects/MedLands/engunttz.htm#RobertVauxdiedafter1130B [See document in the Memories section] |  | Originale | Seconde main | Directe | 
		
			|  Isabel de Clare Le Brus, "Find A Grave Index" |  | Originale | Seconde main | Directe | 
		
			|  Isabel de Clare Le Brus, "Find A Grave Index" |  | Originale | Seconde main | Directe | 
		
			|  Isabel De Clare, "Find A Grave Index" |  | Originale | Seconde main | Directe | 
		
			|  Isabel De Clare, "Find A Grave Index" |  | Originale | Seconde main | Directe | 
		
			|  Isabel de Clare, 4th Countess of Pembroke - Wikipedia page |  | Originale | Seconde main | Directe | 
		
			|  Isabel de Clare, suo jure Countess of Pembroke and Striguil (1172–1220) |  | Originale | Seconde main | Directe | 
		
			|  Lady Isabel De Clare, 4th Countess of Pembroke at findagrave.com |  | Originale | Seconde main | Directe | 
		
			|  Magna Charta Sureties, 1215, |  | Originale | Seconde main | Directe | 
		
			|  Pedigree of Richard FitzGilbert de Clare in the Annuals of Chepstow Castle, pg. 266 [See document in the memories section] |  | Originale | Seconde main | Directe | 
		
			|  Plantagenet Ancestry, Douglas Richardson - William de Warenne 6th Earl of Surrey |  | Originale | Seconde main | Directe | 
		
			|  Plantagenet: p. 97, 112, 114, 124, 136. |  | Originale | Seconde main | Directe | 
		
			|  Richard Strongbow de Clare, Earl of Pembroke, in Cokayne's Complete Peerage, Vol. 1, pg. ix [See document in the Memories section] |  | Originale | Seconde main | Directe | 
		
			|  Ridpath's history of the world |  | Originale | Seconde main | Directe | 
		
			|  Royal Index, University of Hull |  | Originale | Seconde main | Directe | 
		
			|  The Children of William Marshal and Isabel de Clare |  | Originale | Seconde main | Directe | 
		
			|  The Royal Ancestry Bible |  | Originale | Seconde main | Directe | 
		
			|  Vaux Pedigree in The Early History of the Stricklands of Sizergh, pg. 16 [See document in the Memories section] |  | Originale | Seconde main | Directe | 
		
			|  William Marshal, Earl of Pembroke, in Archeologia Cambrensis, 1991 Vol. 4, Pg. 93 [See document in the Memories section] |  | Originale | Seconde main | Directe | 
		
			|  William Marshal, Earl of Pembroke, in the Battle Abbey Roll, Vol. 3, pg. 244-245 [See document in the memories section] |  | Originale | Seconde main | Directe | 
		
			|  William Marshall in the Foundation for Medieval Genealogy ~ http://fmg.ac/Projects/MedLands/ENGLISH%20NOBILITY%20MEDIEVAL1.htm# [See document in the memories section] |  | Originale | Seconde main | Directe |