| Family |
Jacob D. Opp, b. 23 Aug 1896, Eureka, McPherson County, South Dakota, USA , d. 30 Jun 1973, Eureka, McPherson County, South Dakota, USA (Age 76 years) |
| Children |
| | 1. Priscilla Janae Opp, b. 15 Feb 1925, Eureka, McPherson County, South Dakota, USA , d. 20 Jan 2011, Aberdeen, Brown County, South Dakota, USA (Age 85 years) |
| | 2. Gilbert Opp, b. 30 Jun 1926, Eureka, McPherson County, South Dakota, USA , d. 23 Jun 2017, Fergus Falls, Otter Tail County, Minnesota, USA (Age 90 years) |
| | 3. Hilmer L. Opp, b. 27 Sep 1928, Mound City, Campbell County, South Dakota, USA , d. 17 Aug 2015, Richfield, Hennepin County, Minnesota, USA (Age 86 years) |
| | 4. Lorraine Opp |
| | 5. Milo Opp |
| + | 6. Lawrence Opp |
| + | 7. Reinhold Opp |
| + | 8. Harry Opp, b. 20 Sep 1941, Eureka, McPherson County, South Dakota, USA , d. 29 Jan 2018, Underwood, Otter Tail County, Minnesota, USA (Age 76 years) |
| | 9. Gloria Opp |
| + | 10. Geraldine Opp |
|