In the 1860 census, Constantine and Elizabeth have 3 children.
In the 1870 census, Constantine and Theresia Keller are listed as the parents of the seven children, the first 3 being the same as the census of 1860.
Elizabeth's maiden name and birth location are listed on both her son August's death certificate (informed by Constantine - his brother, presumably) and her daughter Mathilda Keller Kramschuster's grave index. The "Knappe" comes from son John Peter's death cert., informed by "Joe Keller". It's unclear which last name might be correct.
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