Adam married Louisa Eliza Epplin on 18 Apr 1882 in Sacred Heart Catholic Church, Du Quoin, Perry County, Illinois, USA. Louisa (daughter of Sebastian Epplin and Katharina Barbara Holden) was born on 26 Jun 1860 in Pinckneyville, Perry County, Illinois, USA; died on 5 Nov 1950 in Du Quoin, Perry County, Illinois, USA; was buried in Sacred Heart Cemetery, Du Quoin, Perry County, Illinois, USA. [Group Sheet] [Family Chart]

1. Sebastian Edward Knapp was born on 28 May 1883 in Du Quoin, Perry County, Illinois, USA; died in 1959 in Du Quoin, Perry County, Illinois, USA; was buried in Sacred Heart Cemetery, Du Quoin, Perry County, Illinois, USA.