Baldwin VI, Comte de Hainaut et Flandre
Baldwin was born in July 1171 in Valenciennes, France.  He died at the age of 33 on June 11th, 1205 in Bulgaria.

 Marie of Champaigne
Marie was born in 1174.  She died at the age of 30 on August 9th, 1204.

 Marguerite, Comtesse de Flandre, Hainaut et Namur
Marguerite was born on June 2nd, 1202 in Constantinople, Turkey.  She died at the age of 77 on February 10th, 1280.