I had run PCA on the Reference 3 dataset before. Now I included Harappa participants in it as well.

Here's the dendrogram based on the Euclidean distance between Harappa participants in their PCA results.

Since no one liked the IBS nearest neighbors lists, I thought making a spreadsheet with every participants' closest 100 neighbors in PCA space might be more fruitful.

Note that for the Harappa participants, the median distance to their nearest neighbor is 0.2064. So if your nearest neighbor is more than let's say 0.3 away, then you are not close to anyone.