I f I am not mistaken your Andrew Jackson Merriman was my great great grandfather's brother, John Morgan Merriman. John was born in TN before 1820, maybe about 1812. Their parents were Charles Merriman and Elizabeth aka Betsy Cook. Betsy Cook believed died in Beldsoe Co Tn. Charles married a Nancy Ham in 1820 before moving to Bond, Montgomery, & Fayette Co's in IL. John and Andrew had another brother, William and possibly a sister. They had several half-siblings.
Did George have a brother, Bryant Henderson Merriman who drowned in White River ferry?