I still have lots of unanswered questions about this and would like a little more detailed advice than the following sentence from the DNA Group Projects Free Space Project:
"Before creating a DNA project, please review the list of Name Studies already existing on WikiTree and work with the relevant members to link these companion projects together."
First of all, this sentence should have a hyperlink to the list of Name Studies already existing. I'm not sure where to find that list. I noticed only a couple of days ago that when I search for a surname which already has a project, the top of the search results page has a small link to, e.g., "Cahir Project". For surnames which do not yet have a project, it would be nice to see a message in the same place along the lines of "WikiTree does not yet have a project for this surname. Click here to learn how to start one."
Many of us who are already profile managers of Name Studies on WikiTree are apparently being asked to work with ourselves to link two companion projects, one of which already exists and already deals with DNA. In my case, this is at
https://www.wikitree.com/wiki/Space:Cahir_Name_Study
Am I expected to set up a second project for the same surname? If the DNA project is separate from the existing Name Study, will both links appear at the top of the search results page?
Or should I just change my existing Page Name from "Cahir Name Study" to something like "Cahir Surname DNA Study"?
Is it required that I also have a standalone FTDNA project for the same surname?
Is it sufficient to add [[Category:DNA Group Projects]] to the existing WikiTree page, as I have done?
I deliberately chose a very rare surname for my first WikiTree surname project in the hope of learning lessons that could later apply to some of the much more common surnames for which I administer FTDNA projects (O'Dea, McNamara, Clancy, etc.).
Please feel free to edit the existing open Cahir Name Study page or to suggest improvements in comments here on this G2G answer.