Rudolph de Alost de GANT
Rudolph de Alost de was born about 1022 in Gand, Flanders, Belgium.  He died after 1058.

 Gisele of LUXEMBURG
Gisele of was born about 1069 in Flanders, Belgium.

 Gilbert de GAUNT
Gilbert de was born in Folkingham, Lincolnshire, England.  He died after 1091.