My Great-Great Grandfather was John O'Neill born in Ireland 1816. I have from the 1880 Census that he lived in Titusville, PA. He was a notary public and a plumber. I think he may have been involved with some oil co. He lived with Helen O'Neill, his wife Fannie O'Neill Dau age 45, Jennie age 23, Clarence are 21, Walter, my great grandfather age 13, Josephine age 8 Harry age 5 and Nellie age 2. I don't know if they remained in Titusville or if they later moved. Any information anyone might be able to provide would be appreciated.