The study of hydrotoponymy shows a prevalent initial Old European layer in central and northern Germany, too, similar to the case in Iberia, France, Italy, and the British Isles.
The recent paper on Late Proto-Indo-European migrations by Frederik Kortlandt relies precisely on this ancestral layer as described by Jürgen Udolph to support a Danubian expansion of North-West Indo-European with East Bell Beakers, identified as the Alteuropäische (Old European) layer that was succeeded by Germanic in the North European Plain.
The Proto-Germanic homeland
The following are excerpts are translated from the German original (emphasis mine) in Udolph’s Namenkundliche Studien … Read the rest “European hydrotoponymy (III): from Old European to Palaeo-Germanic and the Nordwestblock”
Chapter The Sea and Bronze Age Transformations, by Christopher Prescott, Anette Sand-Eriksen, and Knut Ivar Austvoll, In: Water and Power in Past Societies (2018), Emily Holt, Proceedings of the IEMA Postdoctoral Visiting Scholar Conference on Theories and Methods in Archaeology, Vol. 6.
NOTE. You can download the chapter draft at Academia.edu.
Abstract (emphasis mine):
Along the western Norwegian coast, in the northwestern region of the Nordic Late Neolithic and Bronze Age (2350–500 BCE) there is cultural homogeneity but variable expressions of political hierarchy. Although new ideological institutions, technology (e.g., metallurgy and boat building), intensified agro‑pastoral farming, and
… Read the rest “Minimal Corded Ware culture impact in Scandinavia – Bell Beakers the unifying maritime elite”