Geoffroi IV De+ Mayenne
Geoffroi IV De+ was born in 1147.  He died at the age of 23 on February 18th, 1170.

 Isabelle De+ Beaumont-Le-Roger
Isabelle De+ was born about 1147.  She died on May 10th, 1220.

 Juhel III De+ Mayenne
Juhel III De+ was born in 1168 in Mayenne, Maine, France.  He died in Egypt.