R-U198 Y-DNA Project


Welcome to the R-U198 Project
IMPORTANT - New SNPs have been found downstream of U198 (S29) - IMPORTANT
See menu to the left


To bring together information and people from a small group who shared a common direct-line male ancestor a few thousand years ago. By sharing data and ideas we may better understand our common shared ancestry and deep origins.


Testing of the Y-chromosome, which is passed directly, and virtually unchanged, from father to son, is important in family genealogy and the search for deeper origins.

A great many people of European ancestry will find they belong to the ubiquitous "R" haplogroup. This alone is not particularly informative. Fortunately there are easily-affordable tests for finding one’s more relevant (and more recent) haplogroup – simply a group of people who descend via the direct paternal line from a shared forefather. R-U198 is one such “family”.

Our R-U198 haplogroup is defined by the presence of a particular “SNP” marker. If you are unfamiliar with this term you can find an explanation here: explanation of STR & SNP markers

Our project deals with a sub-clade defined by the presence of a positive test result for a special marker called a “SNP”. In our case the SNP is known by a variety of names including the following:


Please note, a positive or “derived” result is required (as opposed to a negative or “ancestral” result for this marker).

All of the above names describe the same marker. Our haplogroup may also be referred to by a variety of very long names but, since these are becoming obsolete, they will not be listed here.

It is also possible, with reasonable accuracy, to predict R-U198 status from Y-STR markers as described here: Page 3 U198 Spotting though a suitable SNP test is still required for confirmation.


We may find evidence of an interesting shared ancestry within our DNA and we invite you to explore further with us.


We also have a project page at Facebook: Click here

Go To Page 2-Administration

Go To Top