Thanks to Alexander "cousin" Carol Vass, who did the work classifying these YDNA-donor Alexanders into color-coded tentative family groups. She based the classification mostly on their DNA results but gave some consideration to their paper trails. This table does not include results beyond 37 markers; however, you may click the last marker of anyone testing beyond 37 to get the results on markers 38 through 67.

In addition to giving each family group a separate color, we have used colors to provide other information. Red text for the kit number of a family member means DNA markers of the other family memebers are compared with those of this member, and clicking on this member's kit number will take you to a page showing the early ancestors of the family members. Usually, we have chosen the member whose markers have the fewest differences with those of other members of the family group. Green text for the haplogroup means that the lab has conducted an actual test for the haplogroup; black menas that the lab has only confidently predicted the haplogroup. Bright yellow cells denote markers of other members that differ from the selected family representative. Red cells in the header denote markers that FTDNA has designated as fast mutators, meaning differences are more likely here.

If you hold the pointer over the kit number of the first (or second if the first is in red text) member of a family group,you will see the name by which current family members designate the family. The "group" means haplogroup, a ten dollar word that most of us don't need to remember unless we are geneticists; however, briefly, haplogroups are divisions of people into major groups depending on where the ancestral tribes lived in relative isolation thousands of years ago. Two families, both designated R1a, are not necessarily closely related in their male line, but, on the other hand, the male lines of two families, one designated R and one one designated I, are certainly separated by thousands of years.

In a few cases, individuals not currently associated with any family group may eventually be joined to form a "new" family on the basis of further testing, but the currently tested markers do not definitively rule these cases in or out. (Twelve markers can sometimes definitively show lack of a relationship but are never enough to establish a definite relationship.)