TiaI am trying to find information on my 3rd Great Grandfather who was born in Ireland and his wife. My 2nd great grandfather was born in Maine and died in 1908 in Michigan. I keep reading and asking if you done a DNA. I have done 6 DNA, how do I know for sure which one belongs to my Great Grandfather? So far, it shows 7-25% Irish. Any help would be appreciated. Both were f their names were John Sullivan.
Thanks