You're talking about the Haloptype variation, R1a1, which 52 percent of Levites of Ashkenazi origin, who were tested, were found to have. This variation is most concentrated in Central Asia, however this does not necessarily denote 'nativity' or 'origin', and could just as likely to be linked to migration over centuries and intermarriage. One of my girlfriends is a Levite, and she looks Circassian - blue eyed, curly dark hair - almost 'Irish' looking. Her family, Ashkenazi Levites, came to UK to escape the Holocaust, as did my Uncle's family, and my ex-partners mother's family.