EP
Ernest Peterson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Winnebago-County, Illinois
Our Model Tree links this Ernest Peterson across the 1920, 1930 and 1940 US Censuses in Winnebago-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1879), then head of a 6-person household.
Age 61
b. ~1879
Male
Head
Born: Sweden
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Winnebago-County, Illinois |
| Surname | Peterson |
| Given Name | Ernest |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Rockford City |
| 1935 Residence (County) | Winnebago |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Carpenter |
| Industry | Building Const |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
| Occupation | Carpenter |
| Township / Ward | Rockford City |
| Est. Birth Year | ~1879 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ernest | Age | Birth yr |
|---|---|---|---|---|
| Ida Peterson | Spouse | — | 57 | ~1883 |
| Edna Peterson | Daughter | — | 25 | ~1915 |
| Robert Peterson | Son | — | 18 | ~1922 |
| Ernest Peterson | Head | — | 61 | ~1879 |
| Kenneth Peterson | Son | — | 20 | ~1920 |
| Lloyd Peterson | Son | — | 23 | ~1917 |
Census Appearances
1920
Winnebago, Illinois
Head, age 41
Winnebago, Illinois · implied b. ~1879 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Ernest |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Sweden |
| Year of Immigration | 1900 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Contractor |
| Industry | Carpenter |
| Class of Worker | Em |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | R |
| Birth Country | Sweden |
| Year of Naturalization | 1905 |
| Birthplace (normalized) | sweden |
1930
Winnebago, Illinois
Head, age 52
Winnebago, Illinois · implied b. ~1878 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Ernest |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Sweden |
| Naturalization Status | Naturalized |
| Year of Immigration | 1898 |
| Age at First Marriage | 20 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Carpenter |
| Industry | Building |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | O |
| Home Value / Rent | 9000 |
| Radio Set | R |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1940
Winnebago-County, Illinois
Head, age 61
Winnebago-County, Illinois · implied b. ~1879 — 6 household members
| Surname | Peterson |
| Given Name | Ernest |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Rockford City |
| 1935 Residence (County) | Winnebago |
| Naturalization Status | Naturalized |
| Occupation | Carpenter |
| Industry | Building Const |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
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 Ernest Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Ernest Peterson
Head · 1940 · age 61 · b. ~1879 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Winnebago-County, Illinois
Open full size
1940 US Federal Census — Winnebago-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00915-00122)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Hilda | 58 | Wife | — | Sweden |
| 42 | Extra | None | Line | — | — |
| 43 | Vern L Maguire | 35 | Head | Drill Press Operator | Illinois |
| 44 | Marilyn Maguire | 11 | Daughter | — | Illinois |
| 45 | Roger Maguire | 8 | Son | — | Illinois |
| 46 | Emma Stonewall | 64 | Mother | — | Sweden |
| 47 | Marie D Orstad | 69 | Head | — | Norway |
| 48 | Gertie Johnson | 73 | Sister | — | Norway |
| 49 | Homer Cogswell | 50 | Head | Bus Operator | Illinois |
| 50 | Jennie Cogswell | 51 | Wife | — | Illinois |
| 51 | Richard E Cogswell | 8 | Son | — | Illinois |
| 52 | Ernest Peterson THIS PERSON | 61 | Head | Carpenter | Sweden |
| 53 | Ida Peterson | 57 | Wife | — | Sweden |
| 54 | Edna Peterson | 25 | Daughter | Office Clerk | Illinois |
| 55 | Lloyd Peterson | 23 | Son | Carpenter | Illinois |
| 56 | Kenneth Peterson | 20 | Son | Draftsman | Illinois |
| 57 | Robert Peterson | 18 | Son | Service Station Attendant | Illinois |
| 58 | Olaf B Bell | 68 | Head | Finisher | Norway |
| 59 | Emma Bell | 64 | Wife | — | Sweden |
| 60 | O. D. Josephson | 45 | Head | Foundry Supply Salesman | Illinois |
| 61 | Helen Josephson | 39 | Wife | — | Illinois |
| 62 | Lucy Josephson | 12 | Daughter | — | Illinois |
| 63 | Arvid Peterson | 49 | Head | Sec. & Treas. | Illinois |
| 64 | Tennesa Peterson | 46 | Wife | — | Nebraska |
| 65 | Herbert A Peterson | 22 | Son | — | Illinois |
| 66 | Dorothy A Peterson | 20 | Daughter | — | Illinois |
| 67 | Donald Peterson | 18 | Son | — | Illinois |
| 68 | Pauline Peterson | 15 | Daughter | — | Illinois |
| 69 | Joan Peterson | 8 | Daughter | — | Illinois |
| 70 | Andrew Swanson | 60 | Head | Steel Treater | Sweden |
| 71 | Elizabeth S Swanson | 57 | Wife | — | Sweden |
| 72 | Helen J Swanson | 20 | Daughter | Factory Worker | Iowa |
| 73 | Kenneth M Swanson | 11 | Son | — | Illinois |
| 74 | Carl J Granquist | 36 | Head | Advertising Manager | Illinois |
| 75 | Roxane Granquist | 23 | Wife | Nurse | Illinois |
| 76 | Alrik Thunberg | 56 | Head | Maintenance | Sweden |
| 77 | Amy Thunberg | 56 | Wife | — | Sweden |
| 78 | E. H. Carlson | 50 | Head | Proprietor | Illinois |
| 79 | Alice Carlson | 47 | Wife | — | Illinois |
| 80 | David A Carlson | 22 | Son | — | Illinois |
Related Census Records
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)