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en.wikipedia.org
Y sacado de ahí, sobre la genética:
Genetics
See also:
Bell Beaker culture § Genetics,
Hallstatt culture § Genetics,
La Tène culture § Genetics,
Gauls § Genetics,
Celtic Britons § Genetics,
Celtiberians § Genetics, and
Italic peoples § Genetics
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Distribution of Y-chromosomal
Haplogroup R-M269 in Europe. The majority of ancient Celtic males have been found to be carriers of this lineage.
[187][188][189]
Genetic studies on the limited amount of material available suggest continuity between Iron Age people from areas considered Celtic and the earlier
Bell Beaker culture of Bronze Age Western Europe.
[190][191][192] Like the Bell Beakers, ancient Celts carried a substantial amount of
steppe ancestry, which is derived from
Yamnaya pastoralists who expanded westwards from the
Pontic–Caspian steppe during late
Neolithic and early Bronze Age.
[193] This ancestry was particularly prevalent among Celts of
Northwest Europe.
[192] Examined individuals overwhelmingly carry types of the paternal
haplogroup R-M269,
[187][188][189] while the maternal haplogroups
H and
U are frequent.
[194][195] These lineages are associated with steppe ancestry.
[187][194] The spread of Celts into Iberia and the emergence of the
Celtiberians is associated with an increase in
north-
central European ancestry in Iberia, and may be connected to the expansion of the
Urnfield culture.
[196] The paternal haplogroup
haplogroup I2a1a1a has been detected among Celtiberians.
[197] There appears to have been significant gene flow among Celtic peoples of Western Europe during the Iron Age.
[198][192] While the Gauls of southern France display genetic links with the Celtiberians, the Gauls of northern France display links with Great Britain and Sweden.
[199] Modern populations of Western Europe, particularly those who still speak
Celtic languages, display substantial genetic continuity with the Iron Age populations of the same areas.
[200][201][202]