Family
 Isabella de Warenne, 4th Countess of Surrey 1) 2)Born ± 1130 Died ± 1203, approximately 73 years Married/ Related to:  Hamelin de Warenne 1) 2)Son of Geoffrey V Plantagenet, Count of Anjou, Touraine and Maine, Duke of Normandy and Illegitimate. Born ± 1129 Died 1202, approximately 73 years Children: 1. William de Warenne, 5th Earl of SurreyDied 1240 Notes: Alice, Countess of Eu can be confirmed as William's niece - therefore Alice's mother must be a sister of William. | |||
Sources
1) Source: Exchequer: Treasury of Receipt: Ancient Deeds, Series A "Confirmation by William de Warenne, earl of Surrey, son of Hamelin and Isabel, of grants to Lewes Priory made by his predecessors." Dated: 1202-1240.. External Linkhttps://discovery.nationalarchives.gov.uk/details/r/C4954160. Reference: E 40/15401 (Data from direct source)
2) Source: Special Collections: Ancient Correspondence of the Chancery and the Exchequer "William de Warenne, earl of Surrey to Hubert de Burgh, justiciar: the justiciar will be glad to hear that the countess of Eu, the earl's niece, and the justiciar's cousin, has arrived in England". Dated: c Aug 1219. External Link
https://discovery.nationalarchives.gov.uk/details/r/C9159957. Reference: SC 1/1/215 (Data from direct source)