Researching our Cummings side of the family and have hit a brick wall. NEED HELP.

My great grandfather was born Benjamin Franklin Cummings on June 19, 1864 in Tioga County, Pa. Looking for his parents. All the information I have is from his death certificate and it states his father's name as Benjamine Cummings ,born in Pa. And the mother's name is unknown. On the Federal Census for my great grandfather, it states that his parents were born in Pa. Any help would be greatly appreicated. Thank You.