Y-DNA tests measure characteristic markers that are passed down only in the male heritage line. Hundreds of thousands of persons, or perhaps a million, have undergone genealogical Y-DNA testing. (If anyone can quantify this, please inform us!). To date, only 36 tested persons are known to have been found exhibiting this low DYS19 STR marker value of 9 or less, which is rare according to available statistics.
This uniqueness indicates that our cluster of tested persons may be of interest to DNA-genealogy researchers, particularly in view of the well-documented paper trail of the Swiss members of our cluster. This documentation extends back 700 years to circa 1300 AD, as documented on the genealogy pages of this Cellier website and the MyHeritage.com references cited herein. This Swiss subgroup appears to have ancestry from Italy, but the paper trail currently ends at that point.
The available data for all known tested persons (as of June 2022) exhibiting DYS19<=9 has been gathered on this site, for ease of analysis. A cross-matrix, and Y-DNA data as it is known, for these unique individuals is shown.
20 tested persons with this characteristic, including the aforementioned Swiss sub-group, are members of the DYS19<=9 Project documented on the Family Tree DNA website.
16 additional such persons have been discovered, through internet searches of other genealogical Y-DNA test data; attempts to contact these persons have, unfortunately, been futile. The extent and format of Y-DNA testing (12, 25, 37, 67, and 111 marker tests are currently common at familytreedna, and more recently "Big-Y" with hundreds) varies among test organizations, and most of those other DYS19=9 persons apparently had very limited-scope tests.
If any person represented here objects to any aspect of this posting, or wishes to share further information, please contact the author with specifics, at the email address given at the foot of this page.
News - We have recently added new members, and invite others to join the Project; also some members have increased the depth of their tests. This results in updates to the data herein in the coming weeks. Also, "BigY" SNP tests (next-generation YDNA tests, expanded from the former 'deep=clade' tests) will hopefully result in greater understanding of familial connections back about 4500 years, augmenting the current paper-trail data encompassing only hundreds of years.
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