 A 2008 estimate suggested that the most recent common ancestor of haplogroup IJ could have lived 30,500–46,200 years ago, while another estimate suggests 43,000–45,700 years.Both of the primary branches of haplogroup IJ – I-M170 and J-M304 – are found among modern populations of the Caucasus, Anatolia, and Southwest Asia.This tends to suggest that Haplogroup IJ branched from IJK in West Asia and/or the Middle East.