Haplogroup R

Y-DNA (paternal line)

A major Eurasian lineage whose branches R1a and R1b dominate much of Europe and Central/South Asia. [isogg]

In the ancient British record

Frequency of R among ancient male samples from Britain & Ireland, by period — from our aggregation of the CC0 Allen Ancient DNA Resource. See the full chart.

Early Medieval 1%
Iron Age 1%
Medieval+ 1%
Roman 2%

For a fuller account, search “Haplogroup R” in a reference such as Wikipedia or ISOGG.

Remember: a haplogroup is a deep, broad lineage shared by many people — not an ethnicity, a nationality or a clan. See what DNA can and can’t tell you.

Sources

[isogg] International Society of Genetic Genealogy (ISOGG), Y-DNA Haplogroup Tree. Reference — cite for haplogroup nomenclature only (not frequencies) · link