Sire Rasse de Gavre III
Rasse was born about 1070 in Gavere, Flandre-Orientale, Belgium.

 Ida de Rouex
Ida was born about 1103 in Roeux, Pas de Calais, Normandy, France.

 Sire Bertrand de Gavre
Bertrand was born about 1129 in Gavere, Flandre-Orientale, Belgium.  He died in 1150.