Ellen was probably a descendant of James Adcock, who settled in DeKalb County about 1810.He and his father and brothers migrated from Virgina. James stayed and settled in DeKalb County, while the rest moved on and settled north of Nashville. I descend from James' brother Joseph.
We have an Adcock Site on MyFamily.Com. Someone on that site may have info on your Ellen Adcock. If you want to enter the site, and query the members, give me a shout at firstname.lastname@example.org