I did it on two different sites. I did both autosomal(regular), y-dna(male history) and Mtdna(female history) tests. My surname is Hays and I was really interested in finding out where my surname came from. You can do this with the y-dna test. That test races your male DNA you, to your father, to his father, etc. I did the test and joined a large project at FTDNA that includes hundreds of male Hays all looking for connections. I did not match anyone there, no one even close. Within a year I had several matches show up on the match page that were very close, but they were not Hays. I had 2 matches that were off by 2 markers on the y-111 test. Thats almost close enough to be a brother. But both of these folks were Chancellors, not Hays. After some more digging and some correspondence with those folks we determined that my Hays family and the Chancellors had live next to each other in two states over a long period of time. I put our y-dna match into several time frame (MRCA) models that told me that the three of us shared a common male ancestor within the last 150-180's at the most distant. In a nutshell I have what they call a NPE, a non paternal event. MY GGgrandmother had a fling with one of the Chancellors that lived next door. So I am not a Hays by DNA. I had my father do the same test just to check, he is more closely related to them than I am, so its correct. I typed all of this to warn you that you may find out some things that you may not want to know. I see folks all the time convinced that their paper trail is the standard and they are confused with some of the matches that show up. I also helped a friend figure out who here adoptive parents were, it took a while, but after figuring it out she met her birth family and it did not go well. On the other hand, if you dig and learn it can tell you some interesting things. By my y-dna I am 100% Irish type 4. That group came to Ireland/England as a part of William the Conquerors army. They were Normans that had a Viking background. So my GGGGGGGGgrandfater was a viking.