The Sinclair DNA Project is a global project and open to all who are interested in this family's genealogy. All variant spellings are welcome. If your Surname spelling is close, but missing, we'll be glad to add it. We're growing rapidly and are adding important members of the clan with known paper documentation dating back over 400 years and more. You are very welcome to join our Sinclair DNA study. The new push in our family is Big Y testing with Family Tree DNA. These thousands of results, then verified by Yfull.com, will be the definitive answer as to your connections back in time. The Orkney and Caithness group has solved their connections this way. We're solving the Herdmanston group and closing in on the narrative of the medieval Saint-Clair family. You can do this as well. It's somewhat expensive, but not difficult. Contact us at the link above to discuss next steps.