1861-1954
| Frank Ulrich Heckendorf | |
| B: | 13 Oct 1861 | 
| Watertown, Jefferson County, Wisconsin | |
| D: | 31 Jul 1954 | 
| Stewartsville, DeKalb County, Missouri | |
 1862-1937
| Mary Louise Schmidt | |
| B: | 10 Nov 1862 | 
| Salt Lake City, Salt Lake County, Utah | |
| D: | 27 Aug 1937 | 
| Washington Twp., DeKalb County, Missouri | |
 -Yes, date unknown
| Christian Heckendorf | |
| D: | Yes, date unknown | 
 -Yes, date unknown
| Louise (Heckendorf) | |
| D: | Yes, date unknown |