About Relationship Diagrams
Remember project participants have been divided into five groups on the basis of the Y-DNA results alone. These are Group 1, Group 2 … Group 5. Each of the Groups is subdivided on the basis of conventional genealogy, so that for example Group 1a consists of men descended from John Ewing of Carnashannagh, Group 1b consists of men descended from James Ewing of Inch, etc. Relationship Tables display and compare the Y-DNA results of the men in each of the Groups; Relationship Diagrams outline the conventional relationships among the men in each of the subgroups. Participants in each of the Groups for whom we do not know the conventional relationships with the others have been put in subgroups designated with an asterisk, so that for example the Y-DNA of the men in group Group 1* matches the other men in Group 1, but their conventional genealogic connection with the others is not known. For more detailed information about this, please have a look at Results Introduction.
Information in the Diagrams
Because of the nature of these diagrams, participants’ ancestors are identified only by their first names and date of birth. To see more details, go to the Lineage of the participant of interest posted elsewhere on the website, which can be reached by clicking on the ID in the list of Lineages within the Results Directory. Each of the known kinship groups has a Relationship Diagram, though in a couple of cases (Group 3 and Group 5) there are few enough participants that we could fit the Relationship Diagrams of two kindred on one page. We have also posted “Relationship” Diagrams for the men in the asterisk subgroups, but of course by definition these do not show descent from a common ancestor. Each Relationship Diagram also had a table showing at which markers project participants appearing on that diagram differ from the modal to which their group has been compared, and in many cases, there are other notes. References to Chapters in Fife's "Ewing in Early America" have been included where these are known.
How the Relationship Diagrams are Prepared
Relationship Diagrams have been prepared using Microsoft Excel, but are generally distributed and posted as PDF files because of program compatibility issues. It is relatively easy to prepare such diagrams in Excel by making heavy use of the Merge Cells and Draw Borders features of Excel. I wish I could say I thought of this trick myself, but I learned it from some phylogeny diagrams accompanying one of Doron Behar’s articles.
Behar, DM et al, Counting the Founders: The Matrilineal Genetic Ancestry of the Jewish Diaspora, PLoS ONE. 2008; 3(4): e2062. Available on-line at http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=2323359. The Excel file that gave me the idea is available through a link in that article, at http://www.pubmedcentral.nih.gov/picrender.fcgi?artid=2323359&blobname=pone.0002062.s002.xls.
Mistakes and Corrections