William de Tankerville 
William was born about 1054 in Tancarville, Le Havre, Seine-Inferieure, Normandy, France. William's father was Ralph de Tankerville. His paternal grandparents are Gerard de Tankerville and UNKNOWN Helesinde. He was an only child. He died in 1129.
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Children
Renebault de Tankerville
Renebault was born about 1080 in Tancarville, Le Havre, Seine-Inferieure, Normandy, France. He died in 1140.
Lucy de Tankerville
Lucy was born in Tancarville, Le Havre, Seine-Inferieure, Normandy, France. She died about 1165 in Shipbrook, Northwich, Cheshire, England.
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