Bernard (Benno) I Billung of Saxony

 Hildegarde von Stade
Hildegarde was born in 0978.  She died at the age of 33 on October 3rd, 1011.

 Bernhard II of Saxony
Bernhard II of was born before 1011 in Luneburg, Saxony.  He died on June 29th, 1059.