I am also looking for Gant's in Ohio, but I'm not sure of the county. I found Sarah Gant and Mary Ann Gant (married Hooey) in the 1870 Perry County Illinois census, but both were born in Ohio - Mary Ann in 1839 and Sarah in 1857. I believe they are sisters or aunt and niece. I have no information on parents or siblings. Do your Gant's have an Illinois connection?