One of my sons who lives in USA had an Ancestry DNA test, courtesy of a birthday present from his partner. He said most matches were too distant to bother about, but there were two women who were fairly close. One was his 2/3rd cousin and the other 3/4th cousin - not sure why those are a bit vague. Anyway both are on Ancestry and he contacted the 2/3rd one but got no response, so he then contacted the 3/4th cousin. She replied and gave him a list of surnames in her family tree, but not one matched any of the surnames in my tree. I gave my son the details of two of my g.g.uncles who emigrated to Boston, USA in 1870s/80s to see if the woman recognised any of the names but he's not had any response - so a bit disappointing really.