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Line 1123
256. HAMELIN (PLANTAGENET), Earl of Surrey, d. 7 May 1202; m. 1164, as her 2nd husb. ISABEL DE WARENNE (83-26) (CP IV: 670 chart II)
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From Wikipedia, the free encyclopedia
Hamelin de Warenne, Earl of Surrey (c. 1130 – 7 May 1202) (alias Hamelin of Anjou and (anachronistically[a]) Hamelin Plantagenet), was an Anglo-Angevin nobleman, a half-brother of King Henry II of England, and was prominent at the courts of the Plantagenet kings of England, Henry II and his sons Richard I and John.
He was an illegitimate son of Geoffrey of Anjou, the teenaged Count of Anjou and son-in-law to King Henry I, and thus an elder half-brother of King Henry II,[1] and uncle to King Richard I and King John (sons of Henry II).[2]

Line 83
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).