I have a 4th great grandfather Peter Koller who married Sarah Hummel, both of Reading PA. On 20 Dec 1848 they had a son John Henry (Johann), whose birth certificate I have a copy of. He married Sarah Heller in PA, and had a son Mayberry, who married Irena Thomas. Their son William Franklin had a son, Jim Donald, who is my grandfather. By this time the family almost all lived in Arkansas. I would appreciate any help in this line.