Sam's haplogroup, like mine and Jim McKown's are identical at R1b1a2a1b4c, This is the same as
the rest of those with Maguire DNA except for the letter c suffix which means that Sam, Jim and I
are all three Single Nucleotide Polymorphism (SNP) P66+ as expected. The three of us share a
Most Recent Common Ancestor (MRCA) in the year of our Lord 1661. It is extremely gratifying
to have us match so very closely over a period going back to the common use of surnames in
Ulster, Ireland. The deep subclades, unlike markers can and do show our common heritage going back
to about 3,000 b.c..