According to: D. Georgacas - W.A. McDonald, Place Names of Southwest Peloponnesus, Minneapolis 1967, in the region of Mani, 1450 toponyms are Albanian. There are this theories of prominent greek scholars like Sathas, S. G. Panayotopoulos and P. Kanelidis, Fourikis, etc, about Maniates, Tsakonian dialect, etc, but according to this study and what we read, everything is wrong, so.....
No, it isn't wrong, you just can't understand context and rely many times on outdated sources or sources that were fringy even in their own time. Sathas (the 19th century guy who wanted to downplay the Slavic presence and argue for very early Albanian migrations south, before they are even mentioned in medieval Arbanon in Central Albania) also wrote very interesting things about the connections some Albanian tribes had with Levantine populations like the Mardaites but those were just as nonsensical and I assume you won't accept
those, for example
. You're also not addressing anything specific about the study itself but keep posting the same old stuff.
Arvanites in the early 19th century as described by German ethnographers like Hahn were <20% of the population of the new Greek kingdom (and we have recent work done on their medieval presence as well), yet here we're supposed to think they were the most important element even of very isolated groups like the Tsakones who preserved a very Doric-influenced variant of the Koine.
And of course Tosk Albanians (which the Arvanites are) seem very early Slavic-influenced judging by their R1a and I2 subclades as well so they too would bring in new "early Slavic"-like ancestry wherever they went.
Also, comparisons to northern Balkans populations would not have been helpful to answer one of the primary questions being addressed, i.e. the amount of "Slavic" genetic material in the people of this part of Greece, which is different than the number of people who might have moved into the area during the "Slavic" migrations. Again, do we need to explain that the people moving from further north in the Balkans into Greece were a mixed population, and not genetically "Slav"? The people of the northern Balkans share too much genetic material with Greeks for such an analysis to be useful for answering that question, going all the way back to the Neolithic and including Bronze Age and Iron Age migrations as well as simple movements across unstable political borders, as undoubtedly happened, for example, between Albania and Greece, or between Bulgaria and Greece.
If the burning question for so many posters is which modern population is closest to, for example, the Greeks of classical Greece, or how similar those Classical Era Greeks are to Sicilians, then there is no answering that until we have a lot of ancient Greek dna from that period from multiple locations. All this speculation is useless and misleading.
Exactly, considering we don't have ancient/early medieval Greek or early medieval Slavic samples, you can only use limited approaches which are still interesting for anyone who approaches this as of historical and not nationalistic Balkan interest and if anything you get new data on the structure of the Peloponnese.
The Balkan Slavs (at least the Southeast ones) look like northern-shifted mainland Greeks more or less so a comparison with them would be much less meaningful for attempting to find some proto/very early Slavic input. Maybe the early Slavs who are responsible for much of the Slavic toponymy we see in Greece and Albania (some seems later, judging by sound changes) were already very Balkan in ancestry but in that case we can't differentiate much between those guys and later Bulgarians or Serbs contributing ancestry to Albanians and Greeks (as we know they did).
I don't know what conclusions I'm meant to draw, especially because I can't read the legend, but to be honest, since it's dated to 1830, and probably related to outdated notions of "race" I'm not really interested. I'm even less interested if it was created by this fantasist we've already discussed. Anyone can draw a map from their own fantasies
Balkan ethnography has always been disputed (quite a bit has been written on this about the region of Macedonia for example) and you can sometimes come across completely unrealistic monstrosities but that particular map looks good about language in the 19th century. Of course, it's about language, not genetics - unfortunately we don't know what the early Arvanites looked exactly genetically
either and some Greek linguists have argued for Greek substrates in some Arvanite areas which might indicate some early local mixing even before their linguistic assimilation.