Your explanation of the expansion of the Lusatian core sounds like a possible explanation for the term "Venedi" being found in the Vistula, Brittany...
This looks promising! It's quite informative to follow the video and look some of the clades up on the Block Tree. For instance - at about 9:01 they...
Altvred, there is one per mille of Slavs in the YFull base. Even if he were the ancestor of two modern Slavs, he is still the ancestor of the Slavs....
