Regarding the chances of matching a 3rd cousin, I suspect the odds are much better than 1 in a million. We know far fewer than 1 million people have tested, yet there are multiple reports by people having confirmed 3rd cousin matches. If odds of matching a 3rd cousin were 1 in a million, than odds of matching an unknown 2nd cousin would be even more unlikely. Yet I matched a 2nd cousin at 23AndMe who I did not know (although I knew their grandmother). I have not run out all the lines, but I'm pretty confident I have over 100 2nd cousins, and hundreds of 3rd cousins. My paternal grandmother had 9 siblings who all had children. My maternal grandmother had 11 siblings. Just looking at my maternal grandmother, the second generation descendants of her first cousins are my third cousins, and she had 53 first cousins that I know of. So I probably have hundreds of third cousins just from that grandparent alone! That said, it is my experience also that predicted 3rd cousins (2nd-4th range) confirm to more distant relationships than that when confirmed. Maybe cousin marriages are partly the culprit for making these matches seem closer than they are. Steve