John Hughes

John Hughes baker in Savannah GA married Mary Ann Gilbert of Wilmington Island GA 1808. I know there was a John Hughes b 1787 in SC. Was this the same one? The 1820 GA census still shows a John Hughes in Chatham Co GA. The same? They had a son John Denis Benjamin Hughes, one source says b bout 1810 GA, another 1828 SC. This JDB my g grandfather, Bridger John Hughes my grandfather b 1853 Bulloch Co Ga.