Where did the Slavic ethnos come into being, and what territory can be called "primordially Slavic"?
Historians' accounts vary. The Dominican monk-historian Mavro Orbini, who wrote at the end of the 16th-beginning of the 17th century a work called "The Slavic Kingdom", referring to a number of authors, claims that the Slavs came out of Scandinavia:, argue and conclude that the Slavs came out of Scandinavia …
The descendants of Japheth the son of Noah (to whom the author refers to the Slavs) moved north to Europe, penetrating into the country now called Scandinavia. There they multiplied innumerable as St. Augustine points out in his "City of God", where he writes that the sons and descendants of Japheth had two hundred ancestors and occupied the lands located north of Mount Taurus in Cilicia, along the Northern Ocean, half of Asia, and throughout Europe all the way to the British Ocean."
The chronicler Nestor called the most ancient territory of the Slavs - the lands along the lower reaches of the Dnieper and Pannonia. The reason for the resettlement of the Slavs from the Danube was the attack on them by the Volokhs. "Along the same time, they settled the essence of Slovenia along the Dunaevi, where there is now Ugorsk land and Bolgarsk". Hence the Danube-Balkan hypothesis of the origin of the Slavs.
The European homeland of the Slavs also had supporters. Thus, the prominent Czech historian Pavel Shafarik believed that the ancestral home of the Slavs should be sought in Europe, in the vicinity of their related tribes of the Celts, Germans, Balts and Thracians. He believed that in ancient times the Slavs occupied vast territories of Central and Eastern Europe, from where they were forced to leave for the Carpathians under the onslaught of Celtic expansion.
There was even a version about two ancestral homelands of the Slavs, according to which the first ancestral home was the place where the Proto-Slavic language was formed (between the lower reaches of the Neman and the Western Dvina) and where the Slavic people themselves were formed (according to the authors of the hypothesis, this happened from the 2nd century BC era) - the Vistula River basin. From there, the Western and Eastern Slavs have already left. The former settled in the region of the Elbe River, then the Balkans and Danube, and the latter - the banks of the Dnieper and Dniester.
The Vistula-Dnieper hypothesis about the ancestral home of the Slavs, although it remains a hypothesis, is still the most popular among historians. It is conventionally confirmed by local place names, as well as vocabulary. If you believe the “words”, that is, the lexical material, the ancestral home of the Slavs was located away from the sea, in a forest plain zone with swamps and lakes, as well as within the rivers flowing into the Baltic Sea, judging by the common Slavic names of fish - salmon and eel. By the way, the areas of the already known culture of sub-cone burials fully correspond to these geographical features.