I'm hoping that you get a notification of this response. Others may consider it in any case.
EDNEY as a first name could be a clue that a person descends from that family or the person's family may have had a close connection to an EDNEY family. One family member whose middle name was Edney did not know that it came from his own grandmother! Perhaps you could post again with later information than you had for your 2002 post. Please change the subject line to make it draw our attention to a more specific person, time period, and geographical area.
I have numerous SC family names and none that I know about have EDNEYs in their lines in the late 1770's and mid 1800's. My Lucinda EDNEY married Elisha JAMES and moved to Tennessee. My Lucinda seems to have died in TN about 1840. I have researched the EDNEY family in some self-published materials. My EDNEYs started in eastern NC in Pasquotank County and migrated to Henderson County in western NC.
Hoping that this helps someone,
EDNEY Board Admin