Wikipedia
According to a tale related by Jordanes, Gothiscandza was arguably the first settlement of the Goths after their migration from Scandinavia ( Scandza) during the first half of the 1st century C.E.
Jordanes relates that the East Germanic tribe of Goths were led from Scandza by their king Berig. As soon as they had set foot in the land, they named the area Gothiscandza. They soon moved to the settlements of the Rugians (Ulmerugi, a Germanic tribe which had arrived in the area already before the Goths), who lived on the coast, and they chased them away. Then they defeated their new neighbours, the Vandals.
After some time, when at least four generations of kings had passed after Berig, and Filimer was the king of the Goths, their numbers had multiplied. Filimer decided that everyone was to leave Gothiscandza and move to a new region named Oium ( Scythia). Several archaeologists and historians have proposed the theory that the name Gothiscandza was evolved linguistically into Kashubian and other West Slavic languages' rendition of the various historical names of GdaĆsk .