Jean De Luxembourg
Jean was born in 1370.  He died at the age of 27 in 1397.

 Marguerite De Enghien
Marguerite was born in 1372 in Ligny-Et-Barrois, Meuse, France.

 Pierre De Luxembourg Count of St. Pol & Brienne
Pierre De Luxembourg Count of St. Pol & was born in 1390.  He died at the age of 43 on August 31st, 1433.