I believe it is highly likely that the unknown daughter of Andrew Forgey who you made reference to here was my ancestor, Margaret Forgey (named after her moher, Margaret).
Margaret Forgey, my ancestor, was born June 16, 1774.She was married first to Henry Graham Roberts.He died in Dec. 1812 in Knox Co., TN. (which was formed out of a portion of Hawkins Co., TN., in 1792).Margaret was married a second time on Aug. 14, 1820, in Knox Co., TN., to a George HICKLE.He was recorded on the 1830 census of Knox Co., TN., with a wife who was 50-60 years of age.His 50-60 year old wife was Margaret Hickle.I have been unable to determine what became of them after 1830 however.
Margaret Forgey - Roberts named her eldest known son ANDREW Roberts. And her father-in-law was named William Roberts, not Andrew Roberts. Seems to me she named her first born son after her father.
Additionally, Andrew Forgey's Will makes mention of SEVERAL daughters.I believe Margaret Forgey-Roberts-Hickle was one of these daughters of his.