Chechens
Chechens (; '; Old Chechen: Нахчой "Naxçoy") are a Northeast Caucasian ethnic group of the Nakh peoples originating in the North Caucasus region of Eastern Europe. They refer to themselves as Vainakhs (which means "our people" in Chechen) or Nokhchiy (pronounced ; singular Nokhchi, Nakhchuo or Nakhtche). Chechen and Ingush peoples are collectively known as the Vainakh. The majority of Chechens today live in the Chechen Republic, a subdivision of the Russian Federation.
Nakh peoples
A 2011 study by Oleg Balanovsky and a number of other geneticists showed that the Y-DNA haplogroup J2a4b* (a subclade of J2, located mainly in the Middle East, Caucasus and Mediterranean) was highly associated with Nakh peoples. J2a4b* accounted for the majority of the Y-chromosomes of Ingush and Chechen men, with the Ingush having a much higher percentage, 87.4%, than Chechens, who had 51–58% depending on region (the lowest being in Malgobek, the highest in Dagestan and Achkhoy-Martan). In their paper, Balanovsky "et al." speculated that the differences between fraternal Caucasian populations may have arisen due to genetic drift, which would have had a greater effect among the Ingush than the Chechens due to their smaller population (another possible reason for the difference is the greater absorption of foreign peoples into the Chechen populace, reflecting an older theory that the Ingush are more 'archaic' than other Caucasian peoples). The Chechens and Ingush have the highest frequencies of J2a4b* yet reported (other relatively high frequencies, between 10 and 20 percent, are found in the Mediterranean and Georgia).