Molecular phylogenetic research published in 2013 and 2016 for haplogroup J-M267 places the Y-chromosomal Aaron within subhaplogroup Z18271, age estimate 2638-3280 years Before Present (yBP). The finding led to excitement in religious circles, with some seeing it as providing some proof of the historical veracity of the priestly covenant or other religious convictions. Following the discovery of the very high prevalence of 6/6 CMH matches amongst Kohanim, other researchers and analysts were quick to look for it. Some groups have taken the presence of this haplotype as indicating possible Jewish ancestry, although the chromosome is not exclusive to Jews. It is widely found among other Semitic peoples of the Middle East. Early research suggested that the 6/6 matches found among male Lemba of Southern Africa confirmed their oral history of descent from Jews and connection to Jewish culture.(Thomas MG et al. 2000); Later research has been unable to confirm this although it has shown that some male Lemba have Middle Eastern ancestry. Critics such as Avshalom Zoossmann-Diskin suggested that the paper's evidence was being overstated in terms of showing Jewish descent among these distant populations. One source of early confusion was the low resolution of the available tests. The Cohen Modal Haplotype (CMH), while frequent amongst Kohanim, also appeared in the general populations of haplogroups J1 and J2 with no particular link to the Kohen ancestry. These haplogroups occur widely throughout the Middle East and beyond. Thus, while many Kohanim have haplotypes close to the CMH, a greater number of such haplotypes worldwide belong to people with no apparent connection to the Jewish priesthood. Individuals with at least 5/6 matches for the original 6-marker Cohen Modal Haplotype are found across the Middle East, with significant frequencies among various Arab populations, mainly those with the J1 Haplogroup. These have not been "traditionally considered admixed with mainstream Jewish populations" – the frequency of the J1 Haplogroup is the following: Yemen (34.2%), Oman (22.8%), Negev (21.9%), and Iraq (19.2%); and amongst Muslim Kurds (22.1%), Bedouins (21.9%), and Armenians (12.7%). On the other hand, Jewish populations were found to have a "markedly higher" proportion of full 6/6 matches, according to the same (2005) meta-analysis.