Gustav married Emma Catharina Franzen on 7 Nov 1871 in Bensenville, DuPage County, Illinois, USA. Emma (daughter of Johann Heinrich Franzen and Anna Catharine Deters) was born on 6 Apr 1849 in Bensenville, DuPage County, Illinois, USA; died on 27 Jun 1938 in Chicago, Cook County, Illinois, USA; was buried in 1938 in Friedens Cemetery, Bensenville, DuPage County, Illinois, USA. [Group Sheet] [Family Chart]

1. Samuel Heinrich Koch was born on 19 Sep 1872 in Barrington, Cook County, Illinois, USA; was christened on 16 Oct 1872; died on 3 Mar 1946; was buried in 1946 in Eden Cemetery, Schiller Park, Cook County, Illinois, USA.
2. Gustav Carl Koch was born on 28 Jul 1874 in Barrington, Cook County, Illinois, USA; died on 29 Sep 1953 in Fairmont Community Hospital, Fairmont, Martin County, Minnesota, USA; was buried on 1 Oct 1953 in Lakeside Cemetery, Fairmont, Martin County, Minnesota, USA.
3. Ida C. Koch was born on 22 Jun 1876 in Illinois, USA; died on 16 Mar 1952; was buried in 1952 in Eden Cemetery, Schiller Park, Cook County, Illinois, USA.
4. Lydia Dorothea Koch was born in May 1878; died on 19 Sep 1966 in Chicago, Cook County, Illinois, USA; was buried on 22 Sep 1966 in Mount Hope Cemetery, Chicago, Cook County, Illinois, USA.
5. Paul Heinrich Koch was born in Apr 1880 in Illinois, USA; died on 19 Jan 1883 in Beecher, Will County, Illinois, USA; was buried in 1883 in St. John’s Cemetery, Beecher, Will County, Illinois, USA.
6. Dr. Oswin Fred Koch was born on 22 Apr 1883; was christened on 8 Jun 1883 in St. John UCC, Beecher, Will County, Illinois, USA; died on 25 Aug 1937; was buried in 1937 in Mount Hope Cemetery, Chicago, Cook County, Illinois, USA.
7. Emma Caroline Koch was born on 27 Dec 1885 in Beecher, Will County, Illinois, USA; was christened on 5 Feb 1886 in St. John UCC, Beecher, Will County, Illinois, USA; died on 6 Aug 1887 in Beecher, Will County, Illinois, USA; was buried in 1887 in St. John’s Cemetery, Beecher, Will County, Illinois, USA.
8. Adolph Johann Koch was born on 25 Aug 1888 in Illinois, USA; was christened on 11 Sep 1888 in St. John UCC, Beecher, Will County, Illinois, USA; died on 27 Apr 1943 in Bremen Township, Cook County, Illinois, USA; was buried in 1943 in Westlawn Hillcrest Cemetery, Omaha, Douglas County, Nebraska, USA.
9. Theckla Marie Koch was born on 6 Nov 1891 in Beecher, Will County, Illinois, USA; was christened on 6 Nov 1891 in St. John UCC, Beecher, Will County, Illinois, USA; died on 6 Aug 1979 in Omaha, Douglas County, Nebraska, USA; was buried in 1979 in Westlawn Hillcrest Cemetery, Omaha, Douglas County, Nebraska, USA.