Ireland Surname yDNA test results: y111 and Big Y

I took a y67 DNA test in Jun 2016, upgraded it to y111 in Dec 2017, and took the Big Y test in 2017 as well. Our family's yDNA haplogroup is R-YP5640, an extremely rare R1a Scandinavian subclade that falls under Z284 and CTS4179.

As of late Dec 2017, I have:

  • y111: 0 matches
  • y67: 0 matches
  • y37: 1 match, GD 4 (genetic distance) to surname Ivy/Ivey
  • y25: 215 matches, including:
    • y25: 1 GD 0 match to surname Ireland (Wallace Ireland line of Allegheny PA)
    • y25: 1 GD 0 match to surname Smith - but no match to him at y37
    • y25: 25 GD 1 match to non-Ireland surnames - but no matches to any of them at y37+ except for Ivy
  • y12: 1,782 matches


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Y-chromosome DNA tests provide deep historical insight into a single paternal line: from son to father - to father's father - to father's grandfather - and so on, back for tens of thousands of years. The Y-chromosome is never diluted by mixing with another line, because any son has only one father.

From time to time, a mutation occurs on the Y chromosome. That mutation is passed on from father to future descendants - and is not passed on to anyone except those descendants. Over hundreds or thousands of years, the Y chromosome slowly diverges between ancestral lines as some members of a family inherit a series of mutations and others do not. As more time passes, these separate family branches continue to each mutate differently.


A haplogroup is a genetic population group of people who share a common ancestor. Each time a mutation occurs, descendants who inherit the mutation are assigned a new haplogroup, which is a subclade of the original haplogroup. If enough descendants from the different branches have tested, scientists are able to determine which mutations occurred first - and estimate the time to the most recent common ancestor.

I've taken three yDNA-related tests at Family Tree DNA:

  • a y-111 test - resulting in one exact y-25 DNA match to an Ireland-surname descendant of Wallace Ireland (the Allegheny Co PA line). Interestingly, my match had been waiting TEN YEARS for his first close match. Family Tree DNA (FTDNA) estimated that my Haplogroup was R-M198 (an R-1A subclade).
  • As everyone should, I joined my haplogroup project at FTDNA, R1a. They predicted that my haplogroup was R-S6355. I took the R-S6355 SNP test to confirm their projection; they were correct.
  • In August 2017, FTDNA held a major sale on their Big Y test. That test refined my test results one further step to R-YP540 - which turns out to be quite rare among men who have tested. As of 2 Oct 2017, I'm awaiting further analysis of those results.

What was our ancestral path from Africa to America?

One of the main goals of taking the "Big Y" test was to narrow down my paternal line's historical migration path. provides some of the best explanations about likely migration paths that I've found.

Recommended reading:

Haplogroup Line

The simplest view is to look at my haplogroup line (click on the image to zoom in):

Haplogroup Tree

Our haplogroup is easiest to read by starting at the very bottom left at CTS4149 (bright yellow; typo: should be CTS4179) and working back in time. Click on the image to zoom in:

What this means: any time my family members meet someone else with the surname Ireland, it's highly unlikely that we're related to them.

Are we related?

Here are the GEDmatch Kit #s for my father and mother:

GI: A909282
CL: A216073

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