DubhGhaill / Doyle Y-Chromosome
DNA Surname Project
DubhGhaill, Doyle, Doyel, Doyal, O’Doyle, Doyelle, D’Oyly, D’Oyley, D’Oyle, Doyley, Doylee, Doiley, Doley, Duley, Duly, Duely, Dueley, de Oiley, d’Oilly, De Oilgi, Ollie, Oyler, Olley, Oulley, Oullie, Ollie, Owley, Oyly, Oilli, Oiley, L’Oyle or their relatives …
Looking for long lost cousins?
Many Irish clans now have
yDNA surname projects.
One of the most amazing scientific discoveries of the past 50
years is that of DNA testing which can make a very strong
contribution to the field of genealogy. Put simply, a
Y-Chromosome is passed from father to son with only a slight
change every 500 years or so. This means that it
should be possible to test the extended members of a family group
to see if they really do come from the same genetic root.
On the other hand it is also simplistic to believe that all
members of a clan hold the same surname because of a biological
patrilineal connection. In-laws, friends, servants,
and other associates may well have paired the name of their leader
with their own Y chromosome.
The goals of Irish yDNA surname projects usually include the
primary one of finding of relatives in Ireland. The
goals sometimes include the desire to verify paternal ancestry and
the identification of place of origin of the family. A
history of the clan and its various branches can also be part of
the goals of Irish Surname projects.
It has been the case for years that "Irish" yDNA Surname Projects
have attracted people from many countries but they held little
interest for the Irish who were still resident in Ireland.
The argument has been that Irish who live in Ireland “know where
they come from” and don’t need to do DNA tests.
However, Irish yDNA Surname Projects really need Irish-based
participants to get involved in yDNA testing, for several reasons:
Irish-based families may wish to connect with relatives, who may
have emigrated in times past, where there is no paper trail or
living memory to help with making these connections.
How many people in Ireland can say “most of my family emigrated in
the Famine and we have no idea where they went or who their
descendants are”. Or “we have no contact with branches
of our family who left Ireland a long time ago”. Must
this be the case? DNA can open doors for the Irish who
have lost track of relatives. Please note that the
science of DNA is still evolving and that membership of an Irish
Clan is based on one's inherited and chosen identity and not on
bloodline descent alone.
Also, if more Irish men were involved in yDNA Surname Projects it
would help the Irish diaspora who need yDNA results of Irish-based
participants, to serve as "benchmarks" in their genealogical
research. It is an exciting way to bridge the gap
between the sometimes sad lonely emigration of the past and the
modern world of global communications.
In conjunction with Family Tree DNA Ltd. at the University of
Arizona, we have started a DNA project to try and see if we can
confirm that DubhGhaill / Doyle ‘cousins’ in Ireland, Europe, USA,
Australia, Canada, New Zealand, South Africa, South America and
elsewhere can trace their roots back to a common genetic ancestor.
If you are male and a Doyle (or other spelling variation) and you
think that your family came from Ireland originally and would like
to take part in the DNA project please click here
Family Tree DNA.
We strongly recommend that you order at least a 37 marker test
(US$149.00) or better again a 67 marker test (US$238) as this will
provide more accurate information than the basic 12 marker test.
DubhGhaill / Doyle Y-Chromosome DNA Surname Project Group
The project is a tool-kit that assists people in finding out which
groups they belong to; verification of relationship; or just
trying to find additional information, to hopefully piece together
the chaotic history that makes Ireland so interesting and
fascinating, yet frustrating; when putting the fabric of your
While it may be nice to know your
distantly related or a descendant from a particular Icon of Irish
history, surely it’s the excitement of being able to link with
some distant relative in the Ireland, US, Australia, Canada, South
Africa, South America or any other place on earth; or to be able
to place yourself within a particular group or region that is the
true benefit of the DNA project
A Doyle (or derivatives)
surname of itself can often hide the real origin of a family.
With religious changes and great movements of people, names can be
changed to suit the circumstances families face. In
Irish history this has been a common thread in regard to names and
many people may find that by tracing the name the family now has,
they hit brick walls, where the line ceases.
DubhGhaill (Doyle) has been around for more than a thousand years,
but from that name other surnames have devolved. While
some of these changes can be shown through the traditional paper
traces, some have started in mystery.
Irish families often
faced the hardships of war, famine and poverty and many children
were often "adopted" out to allow for the survival of the group.
One example was when land was rented by Spinsters, then they might
"adopt" a male child from another family, who would use their name
Therefore DNA-testing gives us concrete evidence
for identifying and separating family lines.
Y-chromosome DNA testing is especially helpful because the male
Y-chromosome is handed down, father to son, basically unchanged
through the generations, except for rare mutations which, in
themselves, can be helpful indicators of branching.
Accessibility to family DNA testing is doubtless the greatest
technical advance in the history of genealogical research because
-- at long, long last -- we have a tool to break down those brick
So what are you waiting for?
The Ireland yDNA Project website is at: