As I have just said the J2b2 sample's age coincides with the Illyrian arrival into the Balkans
Printable View
J2b2 might have come from Sardinia to the Balkans 8000 years ago by a migration from the West, or even from Central Europe.
Caucasus is out of the question as L283 is only found in Europe.
"The oldest J2b2-L283 sample recovered among ancient DNA samples is a Late Bronze Age (1700-1500 BCE) individual from southern Croatia (Mathieson et al. 2017). His genome possessed about 30% of Steppe admixture and 15% of Eastern Hunter-Gatherer, which suggest a recent arrival from the Steppe. He was accompanied by a woman with similar admixtures, and both possessed typical Pontic-Caspian Steppe mtDNA (I1a1 and W3a). The timing, location and admixtures of these samples fit with the Illyrian colonisation of the Dinaric Alps, which is thought to have taken place between 1600 and 1100 BCE. The Illyrians may have been late Steppe migrants from the Volga region that were forced out of the Steppe by the invasion of the northern R1a tribes who established the Srubna culture (from 2000 BCE). Through a founding effect, J2b2-L283 lineages might have considerably increased their original frequency after reaching Illyria." http://www.eupedia.com/europe/Haplog...A.shtml#J2b2a1