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In page Maud of Gloucester, Countess of Chester:

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Maud of Gloucester, Countess of Chester (died 29 July 1189), also known as Matilda, was an Anglo-Norman noblewoman and the daughter of Robert, 1st Earl of Gloucester, an illegitimate son of King Henry I of England, and Mabel, daughter and heiress of Robert Fitzhamon.[1] Her husband was Ranulf de Gernon, 4th Earl of Chester (died 16 December 1153).[citation needed]