Roger de [Baron Clifford] Clifford - Pedigree | FamilyCentral
 21 Jan 1299/1300 - 23 Mar 1322
 1 Apr 1274 - 24 Jun 1314
 Abt 1276 - 1 Feb 1327
 Abt 1248 - Feb 1287/88
 Abt 1249 - Aft 1309
 1250 - 1291
 Abt 1223 - 1276