Gerard de Tankerville & Helisinde 
They had a son named Ralph.
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Personal Details
Gerard de Tankerville
Gerard was born in 1015 in Tancarville, Le Havre, Seine-Inferieure, Normandy, France.1
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Children
Ralph de Tankerville
Ralph was born in 1034 in Tancarville, Le Havre, Seine-Inferieure, Normandy, France.2
1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=:3035289&id=I590786890
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=:3035289&id=I590786890
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=:3035289&id=I590786890