I am descended from Dexter Moffort Hoff (b. 9-23-11874) and Emma Mabel Martin Hoff (b. 6-17-1877). Dexter is brother to Jonathan Moffort Hoff (b. 3-1-1851) who married Lucinda Burford. Would this be the Jonathan you are seeking?
Is the Jane Griggs you mention also known as Jane Hoff and is she buried in Marietta?