One of the best ways of contributing to this project is to take an interest in the the line called 'DNA Markers' on rabbinical profiles (here is an example: Yehuda Aryeh Leib (Leibel) Alter). If you see one of these markers, simply post a new discussion note here with the URL of the profile and I will add the lineage to the index. There are currently eighteen rabbinical yDNA lineages in the index.
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