Seventeen sampled individuals from Masłomęcz (dated 124–431 CE) provide a first genetic window into a Wielbark cemetery in eastern Poland. Maternally, the profile is dominated by common European haplogroups—U (4 individuals), H (4), HV (2), K (2), and J (1)—a distribution consistent with longstanding maternal continuities in much of Europe. These mtDNA lineages are typically interpreted as part of the local European maternal substrate that persists through the Iron Age and into later periods.
Paternal lineages recorded in this assemblage show notable diversity: haplogroups labeled Z (2), M (1), P30 (1), L80 (1), and L22 (1) are observed among the Y-chromosome results. Some of these markers (for example, Z) have distributions extending into northern and northeastern Eurasia, while others (M and L lineages) are often rare in continental Europe and more frequently observed in south or central Asian contexts. The presence of these lineages in a small, localized sample could reflect long-distance connections, the relict survival of rare paternal lines, or the limitations and noise inherent to small-sample studies. Given the modest sample size (n=17) and the restricted geographic focus, conclusions about large-scale migrations should be cautious.
Taken together, the pattern—maternal continuity with paternal heterogeneity—can be consistent with scenarios of male-biased mobility or incorporation of outsiders into local communities, but the evidence is not definitive. Comparative analyses with broader Iron Age and Migration Period datasets are essential to place Masłomęcz within regional population dynamics.