Hi Dave, Firstly, let me tell you that the surname of MacClinton is listed in Dr. Edward MacLysaght's book, "The Surnames of Ireland, " as being from the Gaelic name 'Mac Giolla Fhionntain, meaning "devotee of St. Fintan." He lists the Gaelic name for the McAlindens/McLindens as the "Mac Giolla Fhiondain" and states that it also means "devotee of St. Fintan." The McClendons/McLendon of the American South have Y-DNA that matched tha McLindens of Ulster, so they are the same family. Thus, it is probable that at least some of the McClintons would be matching the McClendons. Because of this possibility, the McClintons/McLintons would be welcome to join the McClendon DNA Project. It would save you money on a test kit, as joining through an existing project gives you a group discounted price. Here is a link to our McClendon DNA Project's web site home page: http://www.worldfamilies.net/surnames/mcclendon/http://www.worldfamilies.net/surnames/mcclendon/ In addition, I have created and launched a new geographic DNA project, the "Oriel Septs of Ireland DNA Project." The McAlindens/McLindens are listed asa sept of the Oriel (Airghialla) by Dr. MacLysaght, so I would be happy to add McClinton/McLinton to the eligible list, for any McClinton asncestors who wish to try to match their Y-DNA against the McAlinden descendants. Email me, if you are interested in the Oriel Septs of Ireland Project. Now to the practical uses of Y-DNA analysis for genealogy (genetic genealogy). It does not replace traditional genealogy, but works together with traditional genealogy. The Y-DNA, because it is passed from father to son, follows the surname, with periodicmutations. Each mutation could be said to mark a new branching line of that male line. When you are Y-DNA tested, you will be given numerical results for each tested marker. Those results are then matched against the database of the testing company, in our case, FTDNA. If you match another male on 12, 25, 37 or 67 markers, you are than given tools with which to calculate the probable number of generations to a common male ancestor. You are also given the email addresses of any of the persons who match you. There is value in contacting those matching persons, so that you might compare notes on your known genealogy. Often times, one, or several of those matching persons has access to data that you did not have. Occasionally, they might not, but as the Y-DNA testing is ongoing, you will hopefully keep meeting new people who match you. I would never recommend the 12 marker Y-DNA test, as it is often only useful for anthrogenealogy, especially in the case of the Irish, whose adoption of surnames is relatively recent. I personally would also not recommend a 25 marker Y-DNA test for a line from Ireland, for the same reason. It is better to order a 37 marker Y-DNA test kit, as then you are getting closer into the modern day. Nearly all of the members of our McClendon DNA Project have eventually upgraded to the 67 marker Y-DNA test kit, because the McClendons/McLendons of the American South have turned out to have very stable Y-DNA, with very infrequent mutations. Thus, the 67 markers are helping with the sorting out of the various descendant lines, because many of the mutations are occurring on one or more of the markers from 37-67. Plus, in the long run, it is cheaper to purchase the higher marker test kit, than it is to upgrade your test later. Please know that I am not an employee of FTDNA, or any other company. I am strictly a volunteer for the DNA project. I do not receive any money from the sale of DNA test kits. Please fell free to email me, if you have any questions. Best regards, Mary Becker Group Admin.