Henri
Henri was born in 1240 in Luxembourg, Belgium.  He died at the age of 48 on June 5th, 1288.

 Beatrice D'Avesnes
Beatrice was born about 1242 in Beaumont, Hainaut, Belgium.

 Heinrich
Heinrich was born in 1274 in Luxembourg, Belgium.  He died at the age of 39 on August 24th, 1313.