Here is an interesting article (-> link ) that definitely requires more in-depth study. The migration history of the Scandinavian Iron Age has been divided into three phases using a new (?) arithmetic. In the first phase, in the Middle Roman Iron Age, we see migrations from northern Germany and Scandinavia to Central Europe. In the second phase, covering the later Roman Iron Age, the Migration Period and the Merovingian period, we see migrations from the south (it will say from Central Europe) into Scandinavia. This migration would explain two key observations: 1) Anglo-Saxon finds deep in the Swedish Great Lakes region, suggesting even more southern cultural influences, and 2) the shift of the genetic makeup of modern Scandinavians to a more southern location compared to earlier Scandinavian genome samples. In the third phase, during the Viking Age, the expansion of Scandinavian trade and military expeditions to all directions.
My task is to search the Middle Roman Age samples used in the study and place them in a Fennoscandinavian context.