Johannes married Henrietta Wetter on 18 Jul 1878. Henrietta (daughter of Philipp Wetter and Katharina Veiock) was born on 31 Dec 1860 in Sherrill's Mound, Dubuque County, Iowa, USA; died on 6 Apr 1936 in Iowa, USA. [Group Sheet] [Family Chart]

1. George Lawrence Oertel was born on 24 Oct 1879 in Sherrill, Dubuque County, Iowa, USA; died on 4 Mar 1961 in Sherrill, Dubuque County, Iowa, USA.
2. Mary Margaret Oertel was born on 24 Jul 1881 in Iowa, USA; died in 1939; was buried in Sherrill Presbyterian Cemetery, Sherrill, Peru Township, Dubuque County, Iowa, USA.
3. John Oertel was born on 13 Jan 1884 in Sherrill, Dubuque County, Iowa, USA; died on 13 Mar 1962 in Sherrill, Dubuque County, Iowa, USA; was buried in Shawnee Mission, Johnson County, Kansas, USA.
4. William Frederick Oertel was born on 12 Dec 1885 in Iowa, USA.
5. Esther Oertel was born on 1 Jan 1888 in Sherrill, Dubuque County, Iowa, USA; died on 22 Nov 1974 in Dubuque, Dubuque County, Iowa, USA; was buried in Linwood Cemetery, Dubuque, Dubuque County, Iowa, USA.
6. Bertha Anna Oertel was born on 25 Jan 1890; died in 1896; was buried in Sherrill Presbyterian Cemetery, Sherrill, Peru Township, Dubuque County, Iowa, USA.
7. Elmer Henry Oertel was born on 21 Jan 1900 in Peru Township, Dubuque County, Iowa, USA; died on 10 Aug 1970 in Dubuque, Dubuque County, Iowa, USA; was buried in Sherrill Presbyterian Cemetery, Sherrill, Peru Township, Dubuque County, Iowa, USA.