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26. ISABEL DE WARENNE, Countess of Surrey, sole dau. and h., d. 13 July 1199; m. (1) William of Blois, d.s.p., yr. son of STEPHEN OF BLOIS (169-25), king of England; m. (2) 1163, HAMELIN PLANTAGENET) 5th Earl of Surrey (123-26), d. 7 May 1202, natural son of GEOFFREY V (PLANTAGENET), Count of Anjou (118-25, 123-25) CCPIV: 670; ES III 2/355).