Who were the angles and Saxons?

Anglo-Saxons is the term usually used to describe the invading tribes in the south and east of Great Britain starting from the early 5th century AD, and their creation of the English nation, lasting until the Norman conquest of 1066. The Benedictine monk, Bede, identified them as the descendants of three Germanic tribes:

• The Angles, who may have come from Angeln, and Bede wrote that their whole nation came to Britain [3], leaving their former land empty. The name 'England' or 'Ænglaland' originates from this tribe. [4]
• The Saxons, from Lower Saxony (German: Niedersachsen, Germany)
• The Jutes, from the Jutland peninsula.

The Angles and Saxons were closely related, and spoke different dialects of Ingweonic (North Sea German). They could probably understand each other, but probably made fun of each other's accents like the present-day Norwegians and Swedes. Neither could understand the Jutes, who moved south and mixed with Franks in Hannover before moving to Frisia. Chances are they had trouble understanding the Frisians too.