Count of Montdidier Hilduin de Roucy III
Hilduin was born in 0980 in Montdidier, Somme, France.¹   He died at the age of 54 in June 1034 in Ramerupt, Aube, Champagne, France.¹ 

 Lesseline d'Harcourt
Lesseline was born in 0965.²   She died at the age of 32 on January 26th, 0997.³ 

 Count de Roucy Hildouin de Montdidier IV
Hildouin was born in 1010 in Montdidier, Somme, Picardy, France.¹   He died at the age of 53 in 1063 in Ramerupt, Aube, champagne, France.¹ 

 Isabel de Roucy
⁴