J-Z2507 (within J2) is found in 21 individuals. It is part of haplogroup J-M102 for which it was written in 2004 on the basis of present-day samples that: “J-M12 is almost totally represented by its sublineage J-M102, which shows frequency peaks in both the southern Balkans and north-central Italy”(471) In the ancient data we find it in 3 samples from Rome,(436) with the earliest being R474.SG (700-600 BCE). All remaining samples are from the Balkans and indeed the Western Balkans (Montenegro, Croatia, Albania) and most of them are from the Bronze Age. Thus, J-Z2507 has a peri-Adriatic ancient distribution in agreement with the present-day distribution and may represent a Bronze Age or later expansion in the area. The immediately upstream nodes of J-Z2507 are J-Z585, J-Z615, J-Z597 with a similar time depth and include two additional Bronze Age samples from Albania and Croatia, and are thus part of the same pattern. J-Z600, the parent node of J-Z585, includes four additional individuals, one of which is from Croatia, and three of which are from the Late Bronze Age Nuragic culture in the island of Sardinia,(20, 453) thus suggesting that this culture included individuals of Bronze Age Western Balkan origin (these might have Italian intermediaries, but we do not detect any J-Z600 in mainland Italy prior to the aforementioned Iron Age sample from Rome).
Jesus these nomenclatures are questionable. Just say J2b-L283 and then name the downstream clades.