Issac Nolley/Augustus Nolley

I have found Issac Nolley's Grave in a Cemetary in Provincal, LA.He is the son of Augustus Nolley and Margaret Manning.In another cemetary I have found Nathan Augustus Nolley and His wife Vennie Walters.I believe that Issac is Nathan Augustus' father, but I have nothing to substantiate it.Does anyone have info on Issacs Children.