Ralph de Tankerville & partner 
They had a son named Gerald.
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Children
Gerald de Tankerville
Gerald was born in 1015 in Tancarville, Le Havre, Seine-Inferieure, Normandy, France.2
1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=kimbar&id=I71530
2 http://wc.rootsweb.com/cgi-bin/igm.cgi?op=PED&db=tamer&id=I8791&style=TABLE
2 http://wc.rootsweb.com/cgi-bin/igm.cgi?op=PED&db=tamer&id=I8791&style=TABLE