The Kingdom of England (927 - 1707).
England as a nation state began on 12 July 927 AD after a gathering of British kings at Eamont Bridge, Cumbria, but broadly traces its origins to the Anglo-Saxon settlements of Britain [1] and the Heptarchy of petty states [2] that followed and ultimately united. The Norman invasion of Wales from 1067–1283 (formalised with the Statute of Rhuddlan in 1284) put Wales in England's control, and Wales came under English law with the Laws in Wales Acts 1535–1542. On May 1st, 1707, England was united with the neighbouring Scotland to create the Kingdom of Great Britain under the terms of the Acts of Union 1707. Though no longer a direct sovereign state, modern England continues as one of the countries of the United Kingdom.
[1] - The Anglo-Saxons knew themselves as the Angelcynn, Englisc or Engle. These names were originally names from the Engla, or Angles, but came to be used by Saxons, Jutes and Frisians alike. They called their lands Engla land, meaing "Land of the Angles" (and when unified also Engla rice; "the Kingdom of the English"). In time Englaland became England.
[2] - The minor kingdoms in time coalesced into the seven famous kingdoms known as the Heptarchy: East Anglia, Mercia, Northumbria, Kent, Essex, Sussex and Wessex.
Just some more facts about Engaland (Old English).