RO
Robert Olson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Dane-County, Wisconsin
Our Model Tree links this Robert Olson across the 1920, 1930 and 1940 US Censuses in Dane-County, Wisconsin (XGBoost, ~Confirmed), with identified parents Gilbert & Hannah — first a son (b.~1916), then head of a 12-person household.
Age 24
b. ~1916
Male
Son
Born: Wisconsin
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Dane-County, Wisconsin |
| Surname | Olson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Madison City |
| 1935 Residence (County) | Dane |
| Additional Details | |
| Highest Grade | C 1 |
| 1935 Residence | Wisconsin |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Township / Ward | Madison City |
| Est. Birth Year | ~1916 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Gilbert Olson | Head | — | 73 | ~1867 |
| Walter Olson | Other | — | 28 | ~1912 |
| Nelson Smart | Spouse | — | 29 | ~1911 |
| Katherine Petraley Petraley | Other | — | 39 | ~1901 |
| Alma Olson | Daughter | — | 33 | ~1907 |
| Irene Smart | Spouse | — | 26 | ~1914 |
| Robert Olson | Son | — | 24 | ~1916 |
| Hannah Olson | Spouse | — | 54 | ~1886 |
| Grace Olson | Daughter | — | 8 | ~1932 |
| Fred Olson | Other | — | 28 | ~1912 |
| Jennie Flesch | Other | — | 27 | ~1913 |
| Lena Keach | Other | — | 22 | ~1918 |
Census Appearances
1920
Dane, Wisconsin
Son, age 3
Dane, Wisconsin · implied b. ~1917 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Norway |
| Mother's Birthplace | Wisconsin |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1930
Dane, Wisconsin
Son, age 14
Dane, Wisconsin · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Norway |
| Mother's Birthplace | Wisconsin |
| Can Read/Write | Yes |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Dane-County, Wisconsin
Son, age 24
Dane-County, Wisconsin · implied b. ~1916 — 12 household members
| Surname | Olson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Madison City |
| 1935 Residence (County) | Dane |
| Highest Grade | C 1 |
| 1935 Residence | Wisconsin |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Robert Olson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Gilbert Olson (~0.92 confidence) and mother Hannah Olson (~0.92 confidence) and mother Hannah Olson (~0.92 confidence) and father Nelson Smart (~0.60 confidence) and mother Irene Smart (~0.60 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.79
Father
Gilbert Olson
b. ~1866
Source father
● Household
· direct · ~0.92
Mother
Hannah Olson
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Hannah Olson
b. ~1886
Source mother
● Household
· direct · ~0.92
Father
Nelson Smart
b. ~1911
Source father
● Household
· direct · ~0.6
Mother
Irene Smart
b. ~1914
Source mother
● Household
· direct · ~0.6
This person
Anchor record
Robert Olson
Son · 1940 · age 24 · b. ~1916 · Wisconsin
★ You are viewing this record
Sibling
Grace Olson
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alma Olson
Sibling · 1940 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Dane-County, Wisconsin
Open full size
1940 US Federal Census — Dane-County, Wisconsin
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04468-00867)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Isaac Sporiem | Sporien | 57 | Head | Blacksmith | Wisconsin |
| 2 | Lollia Sporiem | Sporien | 26 | daughter | Check Girl | Wisconsin |
| 3 | Clarence Sporiem | Sporien | 24 | Son | Machinist | Wisconsin |
| 4 | William Sporiem | Sporien | 22 | Son | S.C.C. | Wisconsin |
| 5 | Russell Sporiem | Sporien | 18 | Son | — | Wisconsin |
| 6 | William Lamay | 45 | Head | Painter | Wisconsin |
| 7 | Esther Lamay | 32 | Wife | Sewing | Iowa |
| 8 | Deloris Lamay | 14 | daughter | — | Minnesota |
| 9 | Vera Lamay | 12 | daughter | — | Arizona |
| 10 | Leonard Lamay | 7 | Son | — | Iowa |
| 11 | Donald Lamay | 5 | Son | — | Minnesota |
| 12 | Edith Lamay | 2 | daughter | — | Wisconsin |
| 13 | Amos Mathison | 49 | Head | Laborer | Wisconsin |
| 14 | Edna Mathison | 38 | Wife | — | Wisconsin |
| 15 | Clarice Mathison | 10 | daughter | — | Wisconsin |
| 16 | Deloris Mathison | 8 | daughter | — | Wisconsin |
| 17 | Chas Mathison | 7 | Son | — | Wisconsin |
| 18 | Ruth Ann Mathison | 5 | daughter | — | Wisconsin |
| 19 | Beverley Mathison | 4 | daughter | — | Wisconsin |
| 20 | Duane Mathison | 1 | Son | — | Wisconsin |
| 21 | Gilbert Olson | 73 | Head | — | Norway |
| 22 | Hannah Olson | 54 | Wife | — | Wisconsin |
| 23 | Alma Olson | 33 | daughter | Nurse | Wisconsin |
| 24 | Grace Olson | 8 | daughter | — | Wisconsin |
| 25 | Lena Keach | 22 | Lodger | Typist & Filing | Wisconsin |
| 26 | Nelson Smart | 29 | Husband | Loader | Wisconsin |
| 27 | Irene Smart | 26 | Wife | — | Wisconsin |
| 28 | Robert Olson THIS PERSON | 24 | Son | — | Wisconsin |
| 29 | Fred Olson | 28 | Lodger | Policeman | Wisconsin |
| 30 | Walter Olson | 28 | Lodger | Bus Boy | Wisconsin |
| 31 | Katherine Petraley | Petraley | 39 | Lodger | Cook | Wisconsin |
| 32 | Jennie Flesch | 27 | Lodger | Waitress | Wisconsin |
| 33 | John Cox | 54 | Head | Laborer | Wisconsin |
| 34 | Berta Cox | 57 | Wife | — | Wisconsin |
| 35 | Melvin Roh | 29 | Son-in-law | Laborer | Wisconsin |
| 36 | Eleanor Roh | 25 | daughter | — | Wisconsin |
| 37 | Florence Roh | 5 | daughter | — | Wisconsin |
| 38 | Ellman | Ellmann Roh | 3 | daughter | — | Wisconsin |
| 39 | Haakon Wold | 44 | Head | Laborer | Norway |
| 40 | Norma Wold | 36 | Wife | — | Washington |
Pedigree Summary
Robert + 2 siblings
Gen 1 · 5 parents
~0.79
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)