Do you have any record of who those people were and where they went? The people who left around 1860.
My grandfather died in 1952. Most of the records of his birthdate put it in the 1890s. On the census records I have for him, he says his father was born in America. It's certainly possible that somemone coming over in 1860 could have a child here who who had children in the 1890s.
They were in the Wilkes-Barre Pa. area. I have no idea when they arrived there.