Guillaume I De Bethune
Guillaume I was born in 1100 in Bethune, Pas DE Calais, France.  He died at the age of 44 in 1144.

 Clemence De Oisy
Clemence was born in 1110 in Cambrai, Nord, Nord Pas DE Calais, France.  She died at the age of 55 in 1165.

 Robert V De Bethune
Robert V was born in 1135 in Bethune, Pas DE Calais, Normandy, France.  He died at the age of 56 on January 10th, 1191 in Acre, Palestine.