Interactive tree of Yves II Beaumont -Sur-Oise twin]

Petronilla (Pernel) Grentmesnil 1134–1212

Robert Blanchmains Harcourt [Earl of Leicest 1121–1190

Hugh De Grentmesnil [Baron of Hinckl 1092–

Mrs-Hugh De Grentmesnil 1105–

Ivo (Ives) De Grentmesnil 1064–1118

De Gant 1066–

Adeliza Or Alice Beaumont 1035–1091

Hugh De Grentmesnil [Lord of Hinckle 1032–1098

Yves II Beaumont -Sur-Oise twin] 1005–

Mrs. Judith Beaumont 1008–

Yves I Beaumont -Sur-Oise 975–

Gisele Chevreuse 980–

Yves De Beaumont 945–

Mrs. Yves De Beaumont 950–