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TERRY - COOKE HAPLOGROUP R1B - LINEAGE II - Discussion

Haplogroup R1b1

(This is of course a work in progress)

Individuals in this group who have DNA tested as of April 09, 2007: T-30, C-1.

This is one of the more interesting cases in the Terry DNA project. We have two individuals who match 67/67 markers who have different surnames. However, documents indicate the Cooke and Terry family were in the same general areas in North Carolina and Virginia? The question then becomes is the early common ancestor a Terry or Cooke? Suggestions that T-30 is related to the Southside Virginia Terry families is disproved if you view the DNA results in the project. SNP tests indicate this group is R1b1c which is the modal haplogroup for Europeans. Random matches could be a possibility. The Southside Virginia families are noted to be haplogroup I1b. It is suggested other Terry DNA tests should be performed on earlier documented Terry men in this Group. You may find the information for the family of T-30 at James Terry Family.

Click this link at right to see the Cook family DNA project Group 2

In comparing 67 markers, the probability that T-30 and C-1 shared a common ancestor within the last....
4 generations 8 generations 12 generations 16 generations 20 generations 24 generations
89.79% 98.96% 99.89% 99.99% 100% 100%

*The above numbers are based exclusively on the comparison of their Y-DNA results, which show no mismatches. I believe a generation is considered to be 25 years.


The FTDNATiP results are based on the mutation rate study presented during the 1st International Conference on Genetic Genealogy, on Oct. 30, 2004. The above probabilities take into consideration the mutation rates for each individual marker being compared.