Echoes of Iron Age Grand-Est

In the dim sweep of eastern France, the Iron Age I horizon (c. 800–400 BCE) in the Grand-Est unfolds as a palimpsest of earlier Neolithic and Bronze Age traditions. Archaeological data indicates continuity of settlement and exchange across river valleys and upland plateaus, while material culture shows regional varieties of Iron Age craft and funerary practice. The samples for France_GrandEst_IA1 were recovered from contexts at Sainte-Croix-en-Plaine and Jebsen Boden (Nordhouse), placing them in the heart of the modern Grand-Est.

Genetically, this phase sits on multiple older layers. Limited evidence suggests maternal lineages associated with European Neolithic farmers (haplogroups J and K) remain prominent, while the presence of haplogroup U hints at deeper Mesolithic or mixed Bronze Age ancestry. These strands are consistent with a scenario in which local farming populations, Bronze Age networks, and incoming influences during the later first millennium BCE combined to produce regionally distinct communities. Because this interpretation rests on only five genomes, it should be read as a preliminary window into origins rather than a definitive story.

The genetic portrait for France_GrandEst_IA1 is necessarily tentative: only five genomes are available. Maternal haplogroups observed are J (2 individuals), K (1), H7d (1), and U (1). Haplogroup J and K are frequently associated with early European farmers and their descendants, indicating substantial Neolithic-derived maternal ancestry persisting into the Iron Age. Haplogroup U has a long presence in Europe, often linked to Mesolithic hunter-gatherer ancestry or to later admixture with those older lineages. H7d is a sublineage of H, a widespread European maternal lineage with complex local histories.

No robust, replicated pattern of Y-DNA continuity or turnover can be stated here because Y-chromosome haplogroups were not consistently reported for these five samples. Broader regional studies of Iron Age and earlier periods in France show a mosaic of ancestries—Neolithic farmer-derived, Bronze Age steppe-influenced, and residual hunter-gatherer components—and the Grand-Est fits into that layered picture. Given the sample count (<10), conclusions about population movements, sex-biased migration, or continuity must remain provisional. Future sampling and genome-wide analyses would clarify how these maternal signals map onto autosomal ancestries and male lineages.