June:Worldconnect.rootsweb.com confirms your date of 1820.My great grandfather Jacob Akers married Lucinda Duncan in 1834.I have been searching for about 10 years to find his parents.He was born abt. 1810.He may be a sibling of Mary "Polly". Your info. stated that Mary's parents were William Akers and Lydia Elkins.Do you have more documented info. concerning this lineage?
There is a book, FLOYD COUNTY, ITS PEOPLE AND PLACES which gives some lineage info. about the duncan family.It is not in print, but I found a copy in the library at Christensburg. This is the best info. that I have.Thomas Duncan and his brother Blanch migrated to the colonies and settled in virginia probably Montgomery Co.DAVID