Bell Beaker ancestry persisted in Europe through the Iron Age
A study of 4,587 ancient genomes found little to no Únětice genetic contribution to later people in their region or to Celtic-speaking regions more broadly.
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A study of 4,587 ancient genomes found little to no Únětice genetic contribution to later people in their region or to Celtic-speaking regions more broadly.
Bell Beaker-related ancestry remained dominant in western, central and southern Europe through the Iron Age, researchers found in an analysis of a filtered dataset of 4,587 imputed ancient human genomes covering the periods and regions where early Celtic languages are historically documented. They also detected little to no genetic contribution from central Europe’s Únětice populations to later people in their region or to Celtic-speaking regions more broadly.
The study, published in Nature on 4 November 2026, addresses a question distinct from an earlier finding: evidence already links the arrival of Indo-European dialects ancestral to Celtic with migration from the Pontic Steppe. Where and when Celtic subsequently formed and spread within Europe remains disputed.
Celtic languages were once documented across much of Europe; today they persist mainly along its northwestern Atlantic fringe. The study’s genetic evidence can help test proposed movements of people, but it cannot directly identify their languages.
The researchers examined four models for the formation and spread of Celtic: one tied to the Bell Beaker expansion, one to Atlantic Bronze Age maritime networks, one centered on inland France and possibly northwestern Italy, and one in eastern central Europe. Each implies different movements of people.
The team compared segments of DNA shared through common ancestors. For each ancient individual, it fitted the pattern of shared segments as a mixture of patterns from groups used for comparison. This helped the researchers distinguish lasting ancestry from movement between regions and test whether a proposed language spread would require a population movement not supported by the genetic data.
The authors said the persistence of Bell Beaker-related ancestry, without a further influx of Corded Ware-related ancestry from the north or Yamnaya-related ancestry from the east, is consistent with the Bell Beaker expansion bringing dialects ancestral to Celtic into the region. That does not establish what language Bell Beaker groups spoke.
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Analysis
People can adopt a language without changing their genes, study co-author and historical linguist Guus Kroonen said. Persistent ancestry also does not settle what happened later: the authors said later movements are difficult to detect because populations after the arrival of Steppe ancestry were closely related genetically.
To investigate those later movements, the team combined evidence of ancestry linked to early farmers in different regions with samples from Bronze Age populations. The authors treat these as indicators of broad regional ancestry, rather than as precise source populations. They say further sampling from northern France to Germany will help refine the proposed northwestern source region.
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