Jubel Berenger de Rennes
Jubel Berenger was born before 0915.  He died in 0970.

 UNKNOWN Gerberga
UNKNOWN was born before 0915.  She died after 0930.

 Mien I de Fougeres
Mien I was born about 0926.  He died in 1020.

 Conan I le Tort the Crooked de Brittany
Conan I le Tort the Crooked was born in 0927.  He died in Battle of Conquereux.

 Martin de Vitre
Martin was born about 0930 in Bretagne, Normandy, France.  He died after 0960.