Enguerrand III Sire de Perche & de Coucy
Enguerrand III Sire de Perche & de was born about 1175 in Coucy, Picardy, France.  He died in 1243.

 Marie de Montmirel-En-Brie
Marie de was born about 1200 in of Montmirail, Meaux, and de Combrai, France.  She died in 1267.

 Mary de Coucy
Mary de was born about 1228 in France.  She died before 1251 in (dsp).  She was buried in Widow of Alexander II King of Scotland.