Eustace de Conteville
Eustace was born in 1005 in Tonsburgh, Normandy, France.

 John Fitzeustace ("Monoculus") de Burgo
John, known as Monoculus, was born in 1050 in Tonsburgh, Normandy, France or Knaresborough, Yorkshire, England.  He died at the age of 88 in 1138 in Knaresborough, Yorkshire, England.