Hi!
On the 1800 census of Martin County there are several O'Cain families.
Jenney O'Cain aged 45+ with 1 male 16to26 yrs and one female (other than Jenney) under 10 yrs.
If you go into Ancestry.com you will see under William O'Cain family tree that a George G. O'Cain was married to Winey?
Could they have meant Jenney?
There seems to have been several William O'Cains.
You may have this information, but I thought that I would send it anyway.

I am still looking for Wealthy/Welthy O'Cain's parents.
Hope you are doing better than I am with your O'Cains!
Good Luck,
Susan