The age of these 36 samples is 1100-1200 AD, the average age is 1100 AD (and the average age of every individual sample is also 1100 AD, except one sample for which it is 1089 AD and one for which it is 1171 AD). So I think we can agree that it is unlikely that any Restgermanen survived for such a long time still unmixed with the Slavic population.
Okay I agree. However my assumption was that Poles from Wielkopolska Polonized mostly that early wave of German settlers (who probably still had no Slavic admixture or just a small amount). By the way a comparison of Early Medieval Wielkopolska and Modern Wielkopolska Y-DNA haplogroups also shows that there must have been German admixture.
(I included Kuyavia, Santok & Sieradz-Leczyca Land as they are sometimes considered parts of Wielkopolska)
(however, modern percentages from Abreu-Głowacka and Grochowalski are just for Wielkopolskie Voivodeship)
https://i.postimg.cc/3hStNZLM/Wielkopolska-YDNA.png
Modern figures are from Abreu-Głowacka 2013 study (interpreted by Michal Milewski) and Grochowalski 2020:
https://www.termedia.pl/Badania-popu...23736,1,0.html
https://www.frontiersin.org/journals...20.567309/full
Michal's interpretation -
https://genoplot.com/discussions/post/717011
Early Medieval samples can be found in my Google Spreadsheet here:
https://docs.google.com/spreadsheets...it?usp=sharing
Sieradz-Leczyca samples are mostly from Lutomiersk, where there is a very high proportion of R1b (7 out of 10).