Ælfthryth married Cerdicingas, King of Northumbria Edgar I 956. Edgar (son of Cerdicingas, King of Wessex, King of England Edmund I and Shaftesbury, Queen of Wessex Ælfgifu, son of Cerdicingas, King Of England Edmund I and Cerdicingas, Queen of Wessex Elgiva) was born 7 Aug 943, Wessex, England; died 8 Jul 975, Winchester, Hampshire, England; was buried Aft 8 Jul 975, Glastonbury Abbey, Glastonbury, Somerset, England. [Group Sheet]

1. Cerdicingas, Edmund died 970.
2. Cerdicingas, King of Kent Æthelred II was born 969, of, , Wessex, England; died 23 Apr 1016, London, Middlesex, England; was buried 23 Apr 1016, St. Paul's, London, London, England.