Urnfield Expansion Spread Celtic Languages

New identity‑by‑descent (IBD) analyses trace a Late Bronze Age Knovíz/Urnfield ancestry expansion (≈1250–850 BCE) into western Europe and link it to later Hallstatt/La Tène contexts, suggesting that Celtic speech could have spread with migrants who mixed locally rather than forming a single genetic bloc. The method emphasises shared DNA stretches (IBD) to infer recent ancestry pathways that align with archaeological horizons. — If correct, this reframes heritage and identity debates: linguistic/cultural labels (like ‘Celtic’) need not map to coherent genetic units, weakening simplistic genetic claims about modern group identity and affecting nationalist or ancestral narratives.