Thank you for taking the time to reply. Your diligence is saving many people from useless searches.There's a lot of spurious information out there.
In North Carolina, a Smithier/Smathers ggg grandfather named his son after his best friend, Robert Reed. The son is Robert Reed Smathers.There was never a marriage between the two families.That's another way surnames can show-up.
I grew-up in San Francisco hearing that the Smathers were originally French - De Smet, Hugenot refugees who'd sailed to the N C piedmont, later migrating to western North Carolina.Sadie Smathers Patton repeated this in her book, so it was accepted as fact. Years later, thanks to the late Col. Ray K Smathers' prodigious search for original documents, we have learned that they are originally English and sailed directly to Marylandca. 1680