Origin in 1070 ,with Gilles ler Grebert in Gaul .. the clade of the Grebert family . Father was Baron Renaut Tietewin de Haucourt, mother was Dame Judette de Honnecourt . His mother gave him the lands of Forest Greis-Biers near their property in Cambraisas ,Gaul ( now France). Greis-Biers ( in old frankish) became Grebiers, from which became Grebert . There were no surnames in that period , known only by their land ownership . The family of Gilles de Grebert carried on with the surname " Grebert" .