WikiTree doesn't allow manually uploading the haplogroup assignment but it comes from the test that was taken. I am not sure the process used on Geni.com
The descendant on WikiTree that uploaded their results shows haplogroup H1b1b which is a different subclade than H31b1b. Since I can't see the DNA test here because I am not a full member I thought I would post this here since I researching someone with H31b1b haplogroup and somehow all the descendants of this haplogroup are related and I am trying to see if I can find a recent common ancestor.
Anyway, just noticed this discrepancy and wanted to point it out.
Thanks!