Lambert of [Count of Lens] Boulogne - Pedigree | FamilyCentral
 Abt 1020/22 - 1054
 Abt 1004 - 1049
 Abt 984 -
 Abt 977 - 1015
 Abt 953 - 21 May 992
 10 Sep 921 - 10 Sep 954
 913/14 - 5 May 984