there are str markers in that research made public. its not so easy to see.
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I have also looked at a study of Apulians (Italy). Some of their J2b2 appears to be likely PH1751 ;)
It would be interesting if we get some confirmation through FTDNA testing along with a TMRCA estimate, but those areas appear to be heavily under-tested. I would expect this subclade to show up in Bulgaria as well though. There is already a Greek example, but may be Arvanite.
I think j2b2 was at least Pelasgian, Illyrian, Thracian, Hellenic, Roman.
It is very nicely spread thru area and it has nice TMRCA. Also Italy and Greece are rich in it so everything falls into its place.
Its strange tho Vinca and Starcevo are already tested but we yet cant test Illyrian samples. Also Ancient Greeks are not tested as far as i know.