King Æthelstan of England secured the submission of four northern rulers: Constantine II of Scotland, Hywel Dda of Deheubarth, Ealdred I of Bamburgh, and Owain ap Dyfnwal of Strathclyde, leading to seven years of peace. Æthelstan: Æthelstan or Athelstan was King of the Anglo-Saxons from 924 to 927 and King of the English from 927 to his death in 939. He was the son of King Edward the Elder and his first wife, Ecgwynn. Modern historians regard him as the first King of England and one of the "greatest Anglo-Saxon kings". He never married and had no children; he was succeeded by his half-brother, Edmund I. July 12, 927. Wiki link