1) The Anglo-Saxons were a collection of Germanic tribes which settled in what is now England from the early fifth century AD. After the Roman legions departed, the Anglo-Saxons became the dominant culture, subsuming the Romano-British one. 2) ALL of them? There were seven Anglo-Saxon kingdoms - Wessex, Mercia, Northumbria, East Anglia, Essex, Sussex and Kent. They arose around the middle of the sixth century, each with their own monarchies. Important early Anglo-Saxon kings included Oswiu (Northumbria), Offa (Mercia) and Aethelred (Kent). By the ninth century, Kent, Essex and Sussex were effectively client kingdoms of Wessex. The Danish Great Army of 865 pretty much swept away all the A-S kingdoms except Wessex; and in the hundred years or so that followed, the rulers of Wessex re-conquered the Danelaw to create England. See Alfred the Great, Edward the Elder, Athelstan. Danish raiding resumed during the reign of Aethelred the Unready, and soon after his death, and that if his son, Edmund Ironside, The Danish King Canute (or Cnut, or Knut) sat on the English throne. 3) The saxons were pagan up until the arrival of Augustine, who converted them (or re-converted them - remember that the Roman province of Britannia had been Christian) to Christianity. The Danes were pagan in the ninth century, but Canute and his followers were Christian, at least nominally.