With Family Finder we should be able to see where two (or more) lines converge if it is within the last seven generations. This is because Family Finder works best with relationships at the 5th cousin or closer range.
One of the steps in using Family Finder, other than submitting a sample, is to provide a list of surnames in your family line. I have done this for my direct line and will include it below as an example. Since the test goes out to fifth cousins, ideally you will go out to your seventh generation in lineage. I have a couple of gaps, but most of my other 5 times great-grandparents are included. Some of the surnames are duplicated, so that reduces the number and for some I give alternate spellings.
Assembling that list of surnames will be vital to matching records--documented paper records--when you get a Family Finder match. It's time to start your own list!
Lalia Wilson for the Taylor Surname Project