I wonder have any other male McGarrs done the genetic test to find what haplogroup their Y Chromosome is?
Y chromosomes are passed down only the male line, and so (barring adoptions and naughty goings on!) should to some extent reflect surnames.
Like most Irish, my Y chromosome is of the R1b haplogroup, which is the most common of all haplogroups in Western Europe.From Germany eastwards you start getting more of the related but different R1a.
More specifically, mine is of the subgroup R1b1b2a1a2f2.
This is a rather peculiar one, with a marked concentration in North West Ulster, in Donegal and Tyrone and Derry.It has even been linked with the great O´Neill dynasty of kings and earls, though it would be pushing it to claim definite royal descent merely because of this!It seems to have appeared by a random mutation around 500 AD, but all the science is up for debate still...
Anyone else found the same haplogroup, or another one?Would be interesting to see if the Kildare or Galway McGarrs were of a different branch.
If you haven´t done the test, have a look at the company 23andMe.com