Bill, I sure do encourage you to do the DNA. Unfortunately, right now there is no project going for Pittillo or Pattillo surnames. That certainly would not prohibit you from doing a sample. Please check out the familytreedna.com site.The tests are discounted if you join through a group.If I were you I'd join through the Scotland group and do a 25 marker test. When your results come back, you will be given access to a list of people with whom you have matches.For an additional $15, you can then submit your results to the National Geographic Project and received their information regarding your very deep roots. I'd also encourage you to submit your results to the public ysearch.org.That is a site where folks submit results from all different labs beyond familytreedna so all results can be compared.
I suggest, at least, 25 marker tests because as I have followed several projects, I've noticed that the 12 marker tests results in numerous matches which are virtually meaningless unless the surnames are the same.
As I stated before, I do know of one Pittillo male from the James Pittillo line who has his results.And remember, this DNA stuff is relatively new.I suspect in the next few years it will really take off and provide lots of answers to our brick walls.
Your results will be compared to others, regardless of their surnames or various spellings.
By the way, would you share your line with the list?I've never found any early Pittillos in the southeast who where not descendants of my James Pittilo or the Rev. Henry Pattillo.I'm just so very curious to know if those two men were related, as I suspect.