| Birth | October 13, 1876 18 |
| Marriage of a parent | Nicolai Olsen — Martea Larsdatter — View this family Type: Religious marriage January 10, 1879 (Age 2 years) |
| Birth of a half-sister | Anna Olson November 5, 1879 (Age 3 years) |
| Birth of a half-brother | Olaf Olson November 11, 1880 (Age 4 years) |
| Birth of a half-sister | Mary N. “Marie” Olsdatter January 29, 1882 (Age 5 years) |
| Birth of a half-brother | Oscar Olson November 6, 1883 (Age 7 years) |
| Death of a half-brother | Olaf Olson 1883 (Age 6 years) Cause: Died on ship immigrating |
| Birth of a half-brother | Baby Olson September 23, 1887 (Age 10 years) Note: Place of birth most likely Polk County, Minnesota
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| Death of a half-brother | Baby Olson September 23, 1887 (Age 10 years) Cause: During birth |
| Death of a mother | Martea Larsdatter September 23, 1887 (Age 10 years) Cause: Giving birth to 5th child |
| Death of a half-sister | Mary N. “Marie” Olsdatter November 13, 1946 (Age 70 years) |
| Burial of a half-sister | Mary N. “Marie” Olsdatter November 22, 1946 (Age 70 years) Cemetery: Greenwood |
| Death of a half-sister | Anna Olson November 26, 1955 (Age 79 years) |