Hildouin IV de Montdidier Ct de Roucy
Hildouin IV de Montdidier was born in 1021 in Montdidier, Somme, France.¹   He died at the age of 41 in 1062.  He was buried in Comte de Montdidier..^1 1 

 Alice de Roucy
Alice was born in 1014 in Roucy, Aisne, France.¹   She died at the age of 49 in 1063.¹ 

 Marguerite de Montdidier
Marguerite was born in 1045 in of Montdidier, Somme, France.¹   She died at the age of 65 in 1110.¹ 

 Adelheid de Roucy
Adelheid was born about 1050 in La Sarraz, Waadt, Switzerland.¹ 

 Beatrice de Roucy de Montdidier
Beatrice de Roucy was born in 1051 in of Montdidier, France.¹   She died after 1129.¹