CASS is one of the surnames included in this study. I'm forwarding this message at the request of the admin of the Corca Laidhe list. The first link below gives a good overview of the DNA study. Gene Phillips List Admin --------------------------------------------------------------------------------------- Introduction to the Corca Laidhe message list: The goals of the project are to see if DNA can corroborate the genealogies of the Corca Laide and to identify the DNA signatures of the surnames in those genealogies. Currently the focus is on building a haplotype database for names said to have sprung from the Corca Laidhe. The data is made available to other investigators and family historians for analysis as may suit their purpose on the project website at http://www.familytreedna.com/public/Corca_Laidhe/ The genealogy of the Corca Laidhe is described by John O'Donovan in his treatise published in 1849 by the Celtic Society in the book "Miscellany of the Celtic Society". The book is online as both a scanned copy and a transcribed copy; see:' http://ia700302.us.archive.org/7/items/miscellanyofcelt00celt/miscellanyofcelt00celt.pdf http://www.ucc.ie/celt/published/T105009/index.html The genealogy is not straight forward, there is conflicting information in O'Donovan and only a few of the names have pedigrees. There are other sources to consider. A subsidiary purpose of the project is to compile the genealogy of the Corca Laidhe so that pertinent data is collected. I, Colin Ferguson, act as the project admin and the project spun off of the Driscoll project which I also administer. Co-Admin Janet Crawford is an avid researcher of the Corca Laidhe, being descended from Cuileannain, hereditary chief of the Corca Laidhe. Co-Admin Martha Bowes is Admin of the Bowes DNA Project and is archive holder for the Guild of One-Name Studies on behalf of the Bowes. This list provides a means for interested parties to contribute to the project via discussion of both the DNA data and the attendant genealogy of the Corca Laidhe. Such discussion is essential as assistance is required with both technical issues and in research on particular surnames. To join the Corca Laidhe list: http://lists.rootsweb.ancestry.com/index/other/DNA/IRL-CORCA-LAIDHE-DNA.html