The population of England before the Norman Conquest of 1066. The Anglo-Saxons were originally three Germanic peoples from northern Germany and Jutland - the Angles, Saxons and Jutes - that invaded and settled in eastern and southern Britain in the 5th century AD. Though they were still divided into several independent kingdoms, by the 8th century the three groups were beginning to develop a common English identity. The term Angli Saxones was first used by early medieval continental writers to distinguish the invaders from the native Celtic population of Britain.
Notes from Encyclopaedia of the Viking Age by John Haywood. Thames & Hudson 2000. p24
There are a number of websites on the Anglo-Saxons including BBC history - Anglo-Saxons