WP
William Peterson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this William Peterson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1893), then head of a 3-person household.
Age 47
b. ~1893
Male
Head
Born: Sweden
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Peterson |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Truck Painter |
| Industry | Building Contractor |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 306 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
| Occupation | Truck Painter |
| Township / Ward | Chicago |
| Est. Birth Year | ~1893 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Peterson | Head | — | 47 | ~1893 |
| Clarence Peterson | Son | — | 19 | ~1921 |
| Signe Peterson | Spouse | — | 44 | ~1896 |
Census Appearances
1920
Cook, Illinois
Other, age 26
Cook, Illinois · implied b. ~1894 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | William |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Sweden |
| Year of Immigration | 1912 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Painter |
| Industry | Contractor |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth Country | Sweden |
| Year of Naturalization | 1917 |
| Birthplace (normalized) | sweden |
1930
Cook, Illinois
Head, age 36
Cook, Illinois · implied b. ~1894 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Sweden |
| Naturalization Status | First papers filed |
| Year of Immigration | 1913 |
| Age at First Marriage | 26 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Truck Driver |
| Industry | Building |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | R |
| Home Value / Rent | 7000 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1940
Cook-County, Illinois
Head, age 47
Cook-County, Illinois · implied b. ~1893 — 3 household members
| Surname | Peterson |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | Truck Painter |
| Industry | Building Contractor |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 306 |
| 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 William Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Peterson
Head · 1940 · age 47 · b. ~1893 · 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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00954-00124)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Abe Epstein | 30 | Son | Salesman | Illinois |
| 2 | Daniel Epstein | 25 | Daughter | Teacher | Illinois |
| 3 | Katherine Ternes | 37 | Head | — | Illinois |
| 4 | Katherine Ternes | 16 | Daughter | — | Illinois |
| 5 | Geraldine Ternes | 15 | Daughter | — | Illinois |
| 6 | Vivian Ternes | 13 | Daughter | — | Illinois |
| 7 | John B. Nelson | 66 | Head | — | Sweden |
| 8 | Anna Nelson | 85 | Wife | — | Sweden |
| 9 | Fred Schuecht | 66 | Head | — | Ohio |
| 10 | Josephine Schuecht | 50 | Wife | — | Hungary |
| 11 | Charles Bardy | 26 | Step-son | Attendant | Illinois |
| 12 | William Bardy | 24 | Step-son | Rigger Man | Illinois |
| 13 | Richard Bardy | 21 | Step-son | Laborer | Illinois |
| 14 | Charles Eichorst | 46 | Head | Hairspinner | Illinois |
| 15 | William Eichorst | 22 | Son | Machinist | Illinois |
| 16 | John Eichorst | 21 | Son | New Worker | Illinois |
| 17 | Edna Eichorst | 18 | Daughter | — | Illinois |
| 18 | Edward Eichorst | 14 | Son | — | Illinois |
| 19 | Marie Eichorst | 10 | Daughter | — | Illinois |
| 20 | Mary Cecelia Eichorst | 5 | Daughter | — | Illinois |
| 21 | William Peterson THIS PERSON | 47 | Head | Truck Painter | Sweden |
| 22 | Signe Peterson | 44 | Wife | — | Sweden |
| 23 | Clarence Peterson | 19 | Son | Office Boy | Illinois |
| 24 | Fred Erickson | 47 | Head | Stationary Fireman | Pennsylvania |
| 25 | Anna Erickson | 37 | Wife | — | Ireland |
| 26 | Agnes Erickson | 11 | Daughter | — | Illinois |
| 27 | Becca Erickson | 74 | Mother | — | Sweden |
| 28 | Ernest Casperson | 59 | Head | Stationary Engineer | Sweden |
| 29 | Anna Casperson | 55 | Wife | — | Pennsylvania |
| 30 | Robert Casperson | 26 | Son | General Office | Illinois |
| 31 | Russell Nickerson | 33 | Head | Carpenter | Illinois |
| 32 | Viola Nickerson | 28 | Wife | — | Illinois |
| 33 | Loretta Nickerson | 6 | Daughter | — | Illinois |
| 34 | Harold Nickerson | 3 | Son | — | Illinois |
| 35 | Fred Lipkie | 31 | Head | Machinist Helper | Illinois |
| 36 | Marie Lipkie | 22 | Wife | — | Illinois |
| 37 | Geraldine Lipkie | 2 | Daughter | — | Illinois |
| 38 | Frederick Lipkie | 0 | Son | — | Illinois |
| 39 | Margaret Elk | 59 | Head | — | England |
| 40 | Knut Swanson | 53 | Head | Machinist | Sweden |
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)