L1066+ (CTS1202)

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About us

** Please do not attempt to join this project unless you are L1066/CTS1202 positive or at a minimum predicted to be positive  **

L1066 is an SNP found under Z2534 and Z2185. L1066 is also identified as CTS1202 (Geno 2.0 results).

The general consensus is that the L1066/CTS1202 mutation occurred over 3,500 YBP (years before present).

It is unknown whether this mutation occurred in an individual back on the European Continent or in the British Isles however testing thus far shows a strong Ireland representation followed by the Isles and a relative small number back on the Continent. Interestingly, L1066 has been found in Scandinavia however it's currently not possible to determine when the mutation arrived there.

The surnames associated with L1066 are quite varied as one would expect with a founder existing several thousand years ago so it is very difficult to draw any reasonable conclusions regarding more ancient origins. With that said, there are patterns starting to develop pointing more toward specific areas for more recent ancestry. A good example for this would be the Irish Type IV (CTS9881) group, found more heavily in Tipperary and Kilkenny Ireland for example. It's not possible to say at this point when the ancestor or ancestors for this group arrived in Ireland. Most likely this group represents one of the earliest arrivals in Ireland and the surname diversity came from a number of possible sources. It is also possible they are more recent arrivals but currently the evidence tends to support a more ancient origin. We also have what is named the Central Irish Cluster, which has the uncommon values of 22-23 at YCA II A/B. So far this group appears to be focused within the Irish Midlands and has a shared common ancestor existing somewhere between 500 and 900 AD.