Looking at
https://discover.familytreedna.com/y-dna/R-BY250/tree it is one of the few haplogroups which has a similar phylogenetic pattern to main E-V13 branches.
A geographical/spacial position between R-L2 and J-L283 on the one hand and E-V13 on the other would make the most sense. As well as a participation in the Urnfield expansions (like Northern E-V13 branches had it too).
The general lack of older ancient DNA samples, even worse than for E-V13, which means something, could point to an affiliation with cremating and/or undertested Carpathian/Central Balkan populations. This is also generally similar to E-V13, if assuming a similar "behaviour" but more limited distribution.
Based on the very limited sampling and data i would suggest an association either:
Vucedol -> Vinkovci -> Vatin -> Belegis -> Belegis II-Gáva -> Kalakacza
or
Vucedol -> Vinkovci ->Maros/Cetina -> West Balkan groups -> Kalakacza or Kalakacza victims
Even the Kalakacza association would still mean there are two options: Kalakacza regional conflicts among themselves OR Kalakacza being attacked by Thraco-Cimmerian or early Basarabi-related groups from Oltenia.
West-Central Balkan groups which would be neighbours and from which the individuals could have been taken:
The interesting part about these Central-West Balkan groups, which were the direct neighbours of Bosut-Basarabi, is, that some of them are between the West (Italo-Celtic Urnfielders and inhumation using Illyrians) and the East (Daco-Thracians) if looking at their preferences for the burial rites:
The major challenge for the ‘cultural-ethnical’ concept in the case of northern Bosnia was,
first of all, the large diversity of contemporary grave types in the time span between Ha Ba and
Ha C, including both inhumation and cremations in various constructions and with occasionally
uncommon composition of the mortuary sets. The first example that needs to be pointed out is
the Jablanica cemetery, located in northeast Bosnia on the last foothills of the western Balkan
Mountains, towards the valley of the Sava and the Carpathian Basin (Fig. 1.1).
This is a complete mix of Western (Illyrian) and Eastern (Thracian) burial rites:
The intriguing fact about the Iron Age cemetery in Donja Dolina is the wide spectrum of burial
customs through all chronological phases, including inhumation, inhumation of selected body
parts, cremation burials in urns, cremation burials in pits, singular graves without any human re-
mains and even temporary burials in the settlement area 81 To a certain extent, the burial variabil-
ity points to the heterogeneous structure of the community, at least regarding their conceptions of
the afterlife. Even more striking at Donja Dolina are the mortuary sets with unique combinations
of objects (foremost jewellery and weaponry) from various surrounding regions. Specific items
originating from the Alpine region, the Balkans, the Carpathian Basin, and even distant regions
like Greece or Italy, are frequently deposited in the same grave.82
The exact archaeological context and the G25 coordinates could help to push the interpretation this or that way. Like if we find clearly different autosomal profiles for these male individuals, compared to some of the other executed people from the site. Therefore the G25 coordinates would be very welcomed.
Source:
https://www.researchgate.net/public...l_Balkans_from_the_Bronze_Age_to_the_Iron_Age
If these individuals were not derived from Belegis II-Gáva, which preceded Kalakacza, I think they came from these groups centered in Bosnia and being culturally positioned between the Illyrians and Thracians.
