Celredus EncyclopediasEncycl. 1 ‹ McClintock › 1 of 1 McClintock and Strong’s Cyclopaedia · 1867–1887 Celredus (Selredus, or Selfridus), abbot of Medeshamstede (afterwards Peterborough), was brother of Siward, abbot of Croyland, A.D. 806. Choose resources