David Faux has written a 84-page paper on a proposed link between Celts and marker S28 / U152 within the R1b haplogroup.
A Genetic Signal of Central European Celtic Ancestry:Preliminary Research Concerning Y-Chromosome Marker S28 / U152
David K. Faux
"The goal of the present study is to use historical references (via the Greco – Roman Classical authors), plus linguistic and archaeological data, to link the Hallstatt and La Tene Celtic people of Central Europe to a Y-chromosome marker, S28 / U152. The hypothesis under consideration is that all who are S28 positive (thus placed in the phylogenetic haplogroup R1b1c10 / R1b1b2h) are living descendants of these ancient Celtic people who emerged from an Alpine European homeland; with the possible exception of distantly related folk who reside along the Mediterranean coast south to Sardinia."