For them to have rocked up all at the same time would have been a migration of massive proportions and there is no mention of it anywhere by anyone. There is no record of thousands upon thousands of Germanic invaders streaming into Britain to change the ethnic and linguistic make up of the country. The archaeological evidence doesn't indicate ethnic cleansing and driving out of a local Celtic population. We have always assumed that a Germanic invasion came about because of one mention in passing by the Venerable Bede. I think.So you are saying that the Angles, Saxons, and Jutes didn't rock up in their longboats in about 440 AD from Northern Germany/Southern Denmark. That is all a myth?
Someone rocked up in his long boat, but the DNA evidence says that they were, like the Franks who went to Gaul, a ready-made ruling class. You know, chancers and soldiers.