R1a1a Y DNA Haplogroup

I have a great interest in Y DNA haplogroup R1a1a.

My maternal grandmother's paternal grandmother's father/my 3rd Great Grandfather Thomas Eugene Kasinger's Y DNA haplogroup was R1a1a according to the 23andme results of his grandson/my 1st Cousin, 3X removed. My 3rd Great Grandfather Thomas' most distant known patrilineal ancestor in USA was his 3rd Great Grandfather/my 8th Great Grandfather Andreas Kessinger who immigrated to Pennsylvania from the Palatinate, Germany in 1737. 23andme doesn't do full Y DNA testing, and there are no descendants of Andreas Kessinger that did Y DNA testing at FamilyTreeDNA. Therefore, my Kessinger family line's particular R1a1a downstream haplogroup is unknown. I joined R1a facebook group. To my surprise, I found out that some Indian men had it. R1a1a haplogroup is haplogroup common in both Europe and Asia. All of this I learned back in 2013 which was when I first connected with my late 1st cousin, 3X Removed Thomas Kasinger who died over a year ago.

Another reason why R1a1a is of great interest to me is that many Ashkenazi Jews have it and my maternal grandmother's mother was an Ashkenazi Jew.

R1a1a is present in over 50% of Ashkenazi Levites (who comprise 4% of the Ashkenazi Jewish population). This has been used to argue for the case of Ashkenazi Jews being Khazars by those that support the Khazarian Hypothesis. They jump to conclusion that their patrilineal ancestry is Slavic by narrowly focusing on R1a1a as being Eastern European in origin, but this isn't the case.

A 2013 study by Rootsi, Behar et al found the R1a1a found in Levites was R1a-M582/R1a-Y2619 which occurs with significant frequency in Near Eastern regions Iranian Kerman, Iranian Azeri, the Kurds from Cilician Anatolia and Kazakhstan, and among Ashkenazi and non-Ashkenazi Jews. It is absent in Eastern Europeans and present in non-Jewish Near Easterners which makes it likely that Jews picked it up Near Easterners and not from Eastern Europeans.

A 2017 study by Behar determines that R1a-Y2619 sub-clade testifies for a local origin, and that the "Middle Eastern origin of the Ashkenazi Levite lineage based on what was previously a relatively limited number of reported samples, can now be considered firmly validated.

Jewishdna.net lists R1a-Z93 as one of the haplogroups that Ashkenazi Jews have. It also noted that Z93 are in the pastoralist group that migrated the Indo-European language to India and a part of the descendants of Z93 arrived in the Middle East.

R1a-Z93 is the main Asian branch of R1a. It is found in Central Asia, South Asia and Southwest Asia (including among Ashkenazi Jews). R1a-Z93 is the marker of historical peoples such as the Indo-Aryans, Persians, Medes, Mitanni, or Tatars. Z93 also pervaded the genetic pool of the Arabs and Jews.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5668307/

https://www.nature.com/articles/s41598-017-14761-7

https://jewishdna.net/R1a-Z93.html

https://www.eupedia.com/europe/Haplogroup_R1a_Y-DNA.shtml#Indo-Iranian

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