DNA haplogroups are “large groups of similar haplotypes that share a common ancestor having the same single nucleotide polymorphism (SNP) mutation in all haplotypes. Because a haplogroup consists of similar haplotypes, this is what makes it possible to predict a haplogroup from haplotypes. A SNP test confirms a haplogroup…. Haplogroups pertain to deep ancestral origins dating back thousands of years.” source

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Most Benbow men who have been tested are from Haplogroup “I-2a3,” which is also called “I-L233” — meaning that the L233 SNP is the most refined SNP that has been tested positive with this group.  The I-2a3 sub-group is a recent development, and some research trees, such as the one below, have not yet added the group. The presumed refinement of the main Benbow group is:  I2a3a “Western” (I-L233) P37.2+ L1286+ L1287+ L233+.

Below is part of the haplotree showing the tests that have been run on one member, and the branches of the “I” haplogroup tree.

I 2a L233

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Ken Nordtvedt’s conjectured spread map for Haplogroup I

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There is one man in the Y-DNA project from a different branch of the “I” haplogroup, possibly due to another Benbow group from the same haplogroup. There are several “R” haplogroup members, who are not related to each other, so it is possible that there is an adoption or other wrinkle in their background. That would not be surprising in a time when life expectancy was short, and parents sometimes died before their children grew up. There are two “G” haplogroup members who are related to each other, and they are working to find their common ancestor.