>>510660802Vistula is original name of Oder
Chronius is original name of so called Wisลa
Oder is actually deutsche translation of one of real Vistula's 3 real mouths (which are mentioned in Jordanes) called Dziwna in polish.
Viadrus is not even in ancient sources. What you mean could be Oviadua of Ptolemy but it is not Oder, it is short river.
Chalusus - Trava, Suevus - Warnawa, Oviadua - Ryck. Vistula in Ptolemy has its source near the middle course of Albis, cannot be modern so called Wisลa.
>The Slavic languages and identities we know only solidly appear in this region after the fall of RomeThat's a lie, all germanic and sarmatian tribes were slavic, just didn't use name Sclaveni which was new name, and originally only applied to tribes liveing from Bodensee and Noviodunum in Slovenia to Dniestr. Ancient Poles weren't even classiefied as Sclaveni, but Venedi.
> later Slavic migrationsare you talking about fake migrations made up by Godลowski?