1888 - 1917 (29 år)
| Nicholas Nels Mortenson | |
| F: | 29 Mar 1963 |
| Britton, Marshall County, South Dakota, USA | |
| D: | 16 Jul 2000 |
| Bismark Township, Platte County, Nebraska, USA | |
| Ervin Mortenson | |
| F: | 31 Mar 1938 |
| Pierpont, Day County, South Dakota, USA | |
| D: | 5 Feb 1968 |
| Minneapolis, Hennepin County, Minnesota, USA | |
| Betty Lou Martin | |
| F: | 17 Dec 1943 |
| Groton, Brown County, South Dakota, USA | |
| D: | 25 Jun 2011 |
| Aberdeen, Brown County, South Dakota, USA | |
| Martha Lou Mortenson | |
| F: | 17 Jun 1940 |
| Webster, Day County, South Dakota, USA | |
| D: | 16 Dec 2020 |
| Bristol, Day County, South Dakota, USA | |
| Clayton Maurice Farmen | |
| F: | 19 Jul 1937 |
| Webster, Day County, South Dakota, USA | |
| D: | 27 Maj 2003 |
| Aberdeen, Brown County, South Dakota, USA | |
| Kenneth Mortenson | |
| F: | 10 Jul 1910 |
| Pierpont, Day County, South Dakota, USA | |
| D: | 1 Aug 1982 |
| Aberdeen, Brown County, South Dakota, USA | |
| Lillian Langager | |
| F: | 13 Jan 1915 |
| Day County, South Dakota, USA | |
| D: | 21 Apr 1999 |
| Groton, Brown County, South Dakota, USA | |
| Melvin Mortenson | |
| F: | 29 Feb 1908 |
| Pierpont, Day County, South Dakota, USA | |
| D: | 5 Okt 1977 |
| Culbertson, Roosevelt County, Montana, USA | |
| Dorothy Lampert | |
| F: | 17 Apr 1907 |
| Sisseton, Roberts County, South Dakota, USA | |
| D: | 14 Sep 1984 |
| Culbertson, Roosevelt County, Montana, USA | |
| Helena Nilson | |
| F: | 1888 |
| Norge | |
| D: | 1917 |
| Independence Township, Day County, South Dakota, USA | |
| Johannes "John*" Mortenson | |
| F: | 12 Nov 1880 |
| Åkra, Ådland, Rogaland | |
| D: | 1962 |
| Roberts County, South Dakota, USA | |
