One of my third cousins had their Ancestry DNA test results imported into Family Tree DNA. We had hoped that finding common matches between us could help us track down where our Kelly and/or Murphy families were from in Ireland. My father's mother's mother's parents are also her great-great-grandparents.
I see she popped up on my match list so I looked and saw that Family Tree DNA estimates we are 3rd-5th cousins. We're 3rd cousins so that estimate is correct. I see that we share a portion of our DNA on chromosome 9. This is all well and good. Now to see who our common matches are to see whose genealogy we can study to gain insight on where our family came from.
And the winner is...no one. We don't share any common matches. She also compared our DNA on GEDMatch.com and also found no common matches there. It seems our Kelly and Murphy family lines are pretty small. I honestly expected a large number of common matches on these lines but we ended up with none.
Another way to look at the results of this Kelly/Murphy relation is that those people I suspected to be related on my Kelly or Murphy line due to their ancestry in Ireland, it is now more likely they are related on my Doran line or the unknown father of my great-grandfather Tom Doran. So it does provide a bit of negative information, just nothing that points us in the right direction yet.
We are now expecting the Family Tree DNA test results from my aunt in the next month. She should match three of those I already know the matches to. I am hopeful that she'll match at least a few others so we end up knowing a bit more about our ancestry.
I see the value in genetic testing for genealogy. I understand why it would be helpful. So why is it not helping me? Everyone says give it more time so more people can test and hopefully match in the future. It's like wondering who was the first person that bought a telephone? If very few people have one, if very few people have tested, the value isn't that high. Once more people get a phone, or more people test, the more useful your phone or results will be.