John 'One-Eye' MONOCULUS 
John 'One-Eye' was born before 1056 in Vains, Manche, Normandy, France. John 'One-Eye''s father was Richard de VAINS. His paternal grandfather was Ranulf the Moneyer. He was an only child. He died in 1138 in Saxlingham, Norfolkshire, England.
They had a son named Eustace.
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Children
Eustace FITZJOHN
Eustace was born about 1083 in Knaresborough Castle, Yorkshire, England. He died on July 3rd, 1157 in Ambushed near Basingwick Abbey, Flintshire, Wales.