Robert IV de Béthune
Robert IV de was born about 1070 in Bethune,Pas-de-Calais,FRA.  He died about 1123.

 Alix de Péronne-Senlis
Alix de was born about 1075.  Alix de is no longer alive.

 Guillaume I de Béthune
Guillaume I de was born about 1100.  He died in 1144.