DNA ancestry is new to me but I can smell an error here. I just had my DNA analysis done and the result was that I was haplotype J2-m172, common in the middle east but very rare in Europe, exclusively found in southern Greece and Italy. Trouble is I have done my genealogy back to the 1500s and am confident that all my ancestry is from northern Europe, specifically England and Germany. Everyone in my family and ancestry is blond, very fair with blue eyes and so on. Is there any reasonable explanation for this mismatch or should I demand a retest? And please don't tell me that I descend from a Yemeni orphan adopted by germans in the 1400s!