In the "ildau" database at worldconnect.rootsweb.com, I found the following interesting information:
The father of Isabella Ramsey Gettys appears to be William Ramsey, as shown by his will. His wife was Martha or Mary. He apparently had a son Reynolds Ramsey [who married Naomi "Emie" Alexander, daughter of Francis Alexander], another daughter who md. Clark and had daughter Mary; and a grandson William Gettys (son of Samuel). This daughter clearly seems to be the Isabella Ramsey who md. Samuel Gettys. [I got the information on Naomi Alexander from the database "laaymedley" at worldconnect.]
Depending on how other wills mentioned there are interpreted, it appears that William might be a son of Oliver Ramsey, who in turn was a son of Thomas Ramsey, d. 1779/80 and had wife Mary. However, this interpretation might well be incorrect. Inspection of the original will might clarify who William Ramsey's father was.