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Ranulf died in January 1129, and was buried in Chester Abbey. He was survived by his wife and countess, Lucy, and succeeded by his son Ranulf de Gernon. A daughter, Alicia, married Richard de Clare, a lord in the Anglo-Welsh marches. One of his offspring, his fifth son, participated in the Siege of Lisbon, and for this aid was granted the Lordship of Azambuja by King Afonso I of Portugal.