Isabelle Claire De Gand-Vilain 
Isabelle Claire De was born in 1619. She died at the age of 45 in 1664.General Notes
SOURCES:
"Ancestors/Descendants of Royal Lines" (Contributors: Manuel Abranches de Soveral, Reynaud de Paysac, H.R. Moser <Burke Peerage>, L. Orlandini, O.Guionneau, L.B. de Rouge, E. Polti, A.Terlinden <Genealogy of the existing British Peerage, 1842>, L. Gustavsson, C. Cheneaux, E. Lodge, and S. Bontron <Brian Tompsett>) http://geneastar.org.
Isabelle Claire De and Philippe Emmanuel De were married in a religious ceremony on September 22nd, 1638. They had two sons and a daughter, named Philippe Emmanuel De, Balthazard Charles De and Isabelle Marguerie Caroline De.
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Children
Philippe Emmanuel De Croy
Philippe Emmanuel De was born on October 29th, 1641. He died at the age of 77 on December 22nd, 1718.
Balthazard Charles De Croy
Balthazard Charles De was born on March 10th, 1644. He died at the age of 60 on October 1st, 1704.