Ashkenazi Y-DNA Haplogroup R2

Based upon the methodology posted here and using the sample set described here, as of January 2019 it appears that there is one ancestral Y-DNA line in haplogroup R2 in the Ashkenazi Jewish population: (1) the R2-FGC13201 subcluster of R2-F1092.  A tree for this cluster is posted below.

R2-F1092 (R2-FGC13201 subcluster)
Upstream SNPs: 
M207>M479>M124>P267>FGC13203>FGC13192>F1092
TMRCA (YFull Tree)
R-F1092 7,200 ybp (5,800-8,700 ybp) (the YFull YTree has no SNPs downstream from R-F1092)
TMRCA (JewishDNA.net)
R2a-F1092-FGC13211 (AB-085): 1213-1502 CE

It appears likely that R2-F1092 and R2-F1758 are not tested through Big Y, and that the men in the sample set who are F1092+ and F1758+ belong to the R2-FGC13201 subcluster of the R2-F1092 cluster.  

Based upon the age of R2-FGC13201 and the lack of upstream clustering with men in the sample set, it appears, pending further information, that R2-FGC13211 may have entered the Ashkenazi population in the early part of the last millenium.

Y-DNA SNPs Not Appearing on Tree Posted Above
In addition to the SNPs posted above, there are a number of SNPs identified through the methodology used on this website that do not appear in the tree posted above.  In some cases, primarily with regard to SNPs reported by Family Tree DNA based upon the results of Big Y testing or Geno 2.0 testing, the reported SNPs are ancestral to the SNPs set forth in one or more of the trees above; if the tested man is Ashkenazi on his direct male line, Big Y testing would likely determine that he belongs to one of the clusters set forth above.  In other instances, it is possible that SNPs identify a small and/or undertested Ashkenazi cluster; further testing or information may identify such clusters.  Often, because the methodology used herein to identify potential Ashkenazi SNPs is overinclusive (especially for the 50 cM cohort but also, on occasion, for the 80 cM and 100 cM cohorts), SNPs set forth below do not reflect Ashkenazi (or Jewish) ancestry on the direct male line. Finally, there are some SNPs (identified with "N/A") that do not appear on FTDNA's Y-DNA haplotree at all.
If men who are reported based upon STR or Geno 2.0 testing as R-M124+ are of Ashkenazi descent on their direct male line, there is a high probability that such men belong to the R2-F1092 Ashkenazi Y-DNA cluster. However, a large proportion of the men reported as having this terminal SNP are not of Ashkenazi descent on their direct male lines.

Other Reported Terminal SNPs in Haplogroup R. In addition to the SNPs identified above, the dataset includes one SNP (R-M173) (identified in red) which is ancestral to haplogroup R as a whole, and seven SNPs not identified by the materials consulted for this analysis as belonging to haplogroup R1a, R1b, or R2.
Upstream SNP.  R-M173 (identified in red) is upstream from R1a, R1b, and R2.  If men who are reported as R-M173 are of Ashkenazi descent on their direct male line, there is a high probability that such men belong to one of the Ashkenazi Y-DNA clusters in haplogroup R.

Other SNPs.  Based on the available information, R-BY39369 (identified in blue) may belong to one of the Ashkenazi Y-DNA clusters in haplogroup R.  With the exception of that SNP, it is unlikely that men with the terminal SNPs identified with "N/A" are of Ashkenazi descent on their direct male lines.