So I just learned the year before last, at the age of 49, that I'm a Terry, the son of a long line of Terrys going back to Stephen Terry, who shipped over from England in 1630. His grandfather, also Stephen Terry, lived in Long Sutton, Hampshire, England, which is about midway between Aldershot and Basingstoke if you pull up Google Maps.
So I got some yDNA testing done, and the testing indicates that my haplogroup is R-M173. Which is all well and good, but it doesn't match the vast majority of Terrys, especially the Irish Terrys of Cork and Waterford, who are mostly R-M269. So, evidence seems to indicate either that Stephen Terry was an R-M173, or that he was an R-M269 who had an R-M173 hired hand. Or, lots of other possibilities, but you get the idea.
So I'm hoping to look up some other Long Sutton Terrys so I can compare notes. Please drop me a line if you would.
EDIT: This Terry clan also had members in Crondall, Church Crookham, Dummer, and possibly southern Berkshire, not to mention at least one son who made a fortune in London as a goldsmith. If any of this rings a bell, please contact me.