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W E Wightman, *The Lacy Family in England and Normandy, 1066-1194*,
genealogical chart following p 260.
From same, p 178: King Henry I's permission for the marriage of Robert de Lisours with Aubrey de Lacy was obtained in 1129-30.
"Robert fitz Eustace (ob. 1163) (1) Aubrey de Lisours (ob. post 1194) = (2) William de Clairfait = (3) William fitz Godric" W E Wightman, *The Lacy Family in England and Normandy, 1066-1194*, genealogical chart following p 260.