Thomas I de Coucy
Thomas I was born in 1073 in Coucy, Aisne, Picardy, France.¹   He died at the age of 57 in 1130 in Coucy, Aisne, Picardy, France.¹ 

 Ida de Hainault
Ida was born in 1085 in Hainault, Flanders, Belgium.²   Ida is no longer alive.

 Beatrice de Coucy
Beatrice was born in 1101 in Coucy, Ardens, France.