Louis De Gramont
Louis De was born in 1689.  He died at the age of 56 in 1745.

 Genevieve De Gontaut-Biron
Genevieve De was born in 1696.  She died at the age of 60 in 1756.

 Antoine VII De Gramont
Antoine VII De was born on April 19th, 1722.  He died at the age of 78 on April 17th, 1801.