it's trueIf you don’t know, not sure how common this knowledge is so sorry if I come off as condescending, the Lithunian Rus is as its name suggests a historiographic theory that the grand duchy of Lithuania was the true successor to the Kievan Rus
not sure how this works thoughLithuania -> Cossacks
That's rookie stuff.There's an even crazier historiographical theory which claims that the Lithuanians are actually descended from the ancient Romans via Pontic refugees:
Palemonids - Wikipedia
en.wikipedia.org
Try this
Sarmatism (pseudohistory) - Wikipedia
en.wikipedia.org