Nielsen Hayden genealogy
Family: John fitz Gilbert / Sybil de Salisbury (F6304)
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Father | Male
John fitz Gilbert
Born Bef 1109 of Cherhill, Wiltshire, England 
Died Bef 29 Sep 1165 Buried Married Other Spouse Aline Pipard | F1566 Married Other Spouse Alice de Coleville | F2198 Married Father Gilbert | F3561 Group Sheet Mother
Mother | Female
Sybil de Salisbury
Born Died Buried Father Walter of Salisbury | F4048 Group Sheet Mother Sybil de Chaworth | F4048 Group Sheet
Child 2 | Male
+ William Marshal
Born Abt 1146 Died 14 May 1219 Caversham, Oxfordshire, England Buried Temple Church, London, England Spouse Isabel de Clare | F5382 Married Aug 1189 London, England