1) Y-DNA doesn't determine ethnicity, or 40% of Aframs are Anglos.
2) You now know you're R1b. That means you're one of maybe 250 million, out of 7 billion. Narrowed it down a lot. That's not to mention the L51 split.
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How do I figure out which branch I am of J1e?
My y-dna branch is R1b. My paternal haplogroup is the rare R-U198.
mothers mt-dna haplgroup is U5a1d.