R-DF85 (under R-L21 > R-DF13 > R-DF85): A prominent English/Irish branch, mentioned in pedigree analyses. Associated with Yorkshire/Durham origins; ~20–30% of project testers. TMRCA estimates ~1,500–2,000 years, but surname-level matches suggest 400–600 years.
R-BY132893 and similar R1b-U106 branches: Linked to Low Countries/Germanic migrations into England; ~10–15% of testers. Often tied to northern English or Scottish Border lineages.
R-L270 (under R1b-P312): Rare but noted in some pedigrees; potential Celtic/British ties.