William de [Sir Knight] Ferrers - Pedigree | FamilyCentral
 Abt 1240 - 20 Dec 1287
 Abt 1200 - 24 Mar 1254
 Abt 1218 - 1294
 Abt 1174 - 2 May 1264
 Abt 1196 - Aft 21 Nov 1245
 Abt 1150 - 3 Nov 1219
 Abt 1154 - 19 Jan 1234/35
 Abt 1174 -
 Abt 1130 - 7 Sep 1190
 Abt 1134 - 8 Apr 1212
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