Children |
| 1. John J. Opp, b. 5 Jul 1901, Eureka, McPherson County, South Dakota, USA , d. 7 Jun 1983, Eureka, McPherson County, South Dakota, USA (Age 81 years) |
| 2. Elizabeth Opp, b. 12 Sep 1902, Eureka, McPherson County, South Dakota, USA , d. 28 May 1930, South Dakota, USA (Age 27 years) |
| 3. Bertha Opp, b. 17 Jun 1904, Eureka, McPherson County, South Dakota, USA , d. 19 Jul 1995, Eureka, McPherson County, South Dakota, USA (Age 91 years) |
| 4. Otto J. Opp, b. 22 May 1908, Eureka, McPherson County, South Dakota, USA , d. 11 Dec 1999, Aberdeen, Brown County, South Dakota, USA (Age 91 years) |
| 5. Pauline Opp, b. 16 Mar 1910, McPherson County, South Dakota, USA , d. 30 Mar 1971, South Dakota, USA (Age 61 years) |
| 6. Helen Opp, b. 30 Oct 1911, Eureka, McPherson County, South Dakota, USA , d. 28 Mar 1989, Washington, USA (Age 77 years) |
| 7. Reuben Opp, b. 13 Jul 1913, Eureka, McPherson County, South Dakota, USA , d. 1 Jun 1956, Eureka, McPherson County, South Dakota, USA (Age 42 years) |
| 8. Calvin J. Opp, b. 8 Nov 1914, Eureka, McPherson County, South Dakota, USA , d. 22 Jan 2006, Avera Eureka Healthcare Center, Eureka, McPherson County, South Dakota, USA (Age 91 years) |
| 9. Rudolph Opp, b. 20 Mar 1916, Eureka, McPherson County, South Dakota, USA , d. 14 Jun 2001, Aberdeen, Brown County, South Dakota, USA (Age 85 years) |
| 10. Allen Opp, b. 8 Mar 1918, Eureka, McPherson County, South Dakota, USA , d. 27 Apr 1995, Washington, USA (Age 77 years) |
| 11. Edmund Opp, b. 27 Feb 1920, Eureka, McPherson County, South Dakota, USA , d. Eureka, McPherson County, South Dakota, USA |
| 12. Alma Opp, b. 5 Feb 1923, Eureka, McPherson County, South Dakota, USA |
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