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Surname or Y-DNA testing is one of the newest tools available to genealogists. These tests help genealogists verify their paternal ancestry (father's father) in a quick and easy way. It saves time, prevents mistakes, and provides invaluable data that can be obtained in no other way.

Spelling variations of Kilcoyne/Coyne:  Coan, Coen, Cohen, Coin, Coyne, Gilcoin, Gilcoine, Gilcoyne, Kilcoin, Killcoin, Killcoyne, Koin, Koyne, Kyne, M'Coyne, Mac Giolla Caoin, Mac Giolla Caoine, Mac Giolla Chaoine, Mac Giolla Chaoinne.

All men with the above surnames who have possible or known heritage to Ireland, Scotland, or England are welcome to participate in this study.


Participating in a Surname DNA Project provides:

  • The participant's genetic DNA, which is very close (and sometimes identical) to his earliest known ancestor.
  • The participant's "deep" ancestry (Haplogroup), which identifies the paternal ancestor's prehistoric origins.
  • A sense of camaraderie, which is particularly strong for those who share a genetic ancestry
  • Stimulation to family research and renewed sharing of information
  • A wider sense of identity and relationship, as we begin to realize how much we are a World Family.
  • A chance to compare your genetic ancestry with those of your Surname and the spelling variations
  • Your genetic matches who do not share your common surname
  • The knowledge to understand our ancestors better - particularly where the records have been lost

Click here to order a DNA test in the Kilcoyne project.

This Project's website is now hosted at

Kilcoyne/Coyne Surname Project

The Kilcoyne surname originates in Ireland. It is believed to mean "Follower or Servant of Saint Caoine" (possibly Saint Kevin). Upon the adoption of surnames in Ireland, many Irish inhabitants chose to honor this Saint with their surname. Over the years, many Kilcoynes dropped/changed the "Kil" as a means of survival from English tyranny or, when emigrating to the new world, from those who frowned upon the Irish.  Thus, they created genealogical brickwalls.

The Coyne surname may originate from the O'Cadhain clan, a minor sept in County Mayo, Ireland; from the Kilcoyne surname; or from other sources.  The Kilcoyne/Coyne Surname DNA Project was created in an attempt to discover if and how the various Kilcoyne/Coyne families around the world are related.  With the use of a simple inexpensive DNA test, we can compare each Kilcoyne/Coyne line or individual and determine if they share a common ancestor.

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