Robert Guiscard De Roucy
Robert Guiscard was born in 1135.  He died at the age of 45 in 1180.

 Elisabeth De Mareuil
Elisabeth was born in 1150.  She died at the age of 57 in 1207.

 Eustachie De Roucy
Eustachie was born in 1175.  She died at the age of 37 in 1212.