I am trying to find the maiden name to Mary L. (b. 1858 in Maryland) who married Louis W. Campen (b. 1855) in 1881. They had several children: Caroline C., Lillian, Howard J., Bessie, Clarence, Emma M., and Henry C.. Louis' parents were John Campen of Prussia/Germany b. 1825 and Charlotte Humchenn(?) of Hannover PA or Germany b. 1825.
Any information would be greatly appreciated. Thanks!