IV Geoffrey
IV was born about 1046 in Perche, Normandy, France.  He died in October 1100.

 Beatrix de Montdidier
Beatrix was born about 1040 in Montdidier, Picardy, France.

 Margaret De Perche
Margaret was born about 1067 in Morlaign, Normandy.  She died after 1156 in Warwick, Warwickshire, England.

 Julienne De Perche
Julienne was born about 1070 in Aigle, France.

 II Routrou
II was born in 1070 in Perche, Normandy, France.  He died at the age of 74 in April 1144.

 Countess of Perche Maud
Countess of Perche was born about 1075.