Jacques de Avesnes
Jacques was born in 1155.  He died at the age of 36 on September 7th, 1191 in Palestine.

 Adelphie de Guise
Adelphie was born in 1159.  Adelphie is no longer alive.

 Burchard de Avesnes
Burchard was born in 1182.  He died at the age of 62 in 1244.