Guy IX De Laval
Guy IX De was born about 1265.  He died in 1333.

 Beatrice De Gavre
Beatrice De was born about 1275.  She died in 1316.

 Guy X De Laval
Guy X De was born about 1294.  He died on June 18th, 1347 in Killed in La Roche Derrien.

 Foulques De Laval
Foulques De was born about 1298.  He died after 1358.

 Catherine De Laval
Catherine De was born about 1303.