Family/Spouse: Katharina Steinmann. Katharina (daughter of Johannes Leonhard Steinmann and Karolina Seebach) was born on 24 Mar 1839 in Hinterweidenthal, Pfalz, Bayern; was christened on 24 Mar 1839 in Hinterweidenthal, Pfalz, Bayern; died on 6 Feb 1922 in Cincinnati, Hamilton County, Ohio, USA. [Group Sheet] [Family Chart]

1. August Duke was born on 10 Aug 1863 in Cincinnati, Hamilton County, Ohio, USA; died on 20 Oct 1930 in Cincinnati, Hamilton County, Ohio, USA.
2. Martin Duke
3. Bernard Duke
4. Elizabeth Duke
5. Alphonse Duke
6. Adolph Duke
7. Albert Duke
8. Emma Duke was born on 25 Apr 1880 in Cincinnati, Hamilton County, Ohio, USA; died on 5 Mar 1967 in Cincinnati, Hamilton County, Ohio, USA; was buried in Spring Grove Cemetery, Cincinnati, Hamilton County, Ohio, USA.
9. Charles Duke