WikiTree is a free genealogy website, where genealogists collaborate on a single family tree. Back in 2015, the Holocaust Project was created, and the Religion sub-project, Jehovah's Witnesses was started in 2019.
Purple Triangles is a part of both of these projects, as Jehovah's Witnesses that were persecuted during the Nazi regime were identified with this symbol. The focus of this project is to document and memorialize victims of religious persecution, and connect them to the global tree.
An estimated 10k Witnesses were imprisoned between 1933-1945, about 2k Jehovah's Witnesses died during the holocaust, an estimated 400 were executed, over 1k died in concentration camps, some were killed in gas chambers, medical experiments or lethal injections.<Currently, the focus is working on the Dachau collection available on Ancestry.com, as there is an indicator for whether the victim is a "bibelforscher" or Jehovah's Witness, of which there seem to be about 450. See the space page: Purple Triangles - Dachau
WikiTree functionality allows grouping of profiles into categories, like "Dachau Concentration Camp Prisoners". This functionality will also be used for maintenance of these profiles, for example, "Jehovah's Witnesses, Family Tree Size One", indicates that family members need to be added to the grouped profiles. Members can then pick from that category when they are working on challenges such as the upcoming Connect-a-Thon, where the focus is adding as many profiles as possible during a weekend.
Each Sunday this blog post will be updated with the status of this project along with the list of profiles added that week.