HP
Helen Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Helen Peterson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Nels & T — first a daughter (b.~1910), then head of a 3-person household.
Age 30
b. ~1910
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Peterson |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Evanston City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Housewife |
| Income (1939) | 0 |
| Highest Grade | C-4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Housewife |
| Township / Ward | Evanston City |
| Est. Birth Year | ~1910 |
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 Helen | Age | Birth yr |
|---|---|---|---|---|
| Helen Peterson | Daughter | — | 30 | ~1910 |
| T Peterson | Head | — | 62 | ~1878 |
| Maude Peterson | Spouse | — | 60 | ~1880 |
Census Appearances
1920
Cook, Illinois
Daughter, age 10
Cook, Illinois · implied b. ~1910 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Helen |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 20
Cook, Illinois · implied b. ~1910 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Helene |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Typist |
| Industry | Office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 30
Cook-County, Illinois · implied b. ~1910 — 3 household members
| Surname | Peterson |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Evanston City |
| 1935 Residence (County) | Cook |
| Occupation | Housewife |
| Income (1939) | 0 |
| Highest Grade | C-4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Helen Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Nels Peterson (~0.92 confidence) and father T Peterson (~0.92 confidence) and father Carl Peterson (~0.92 confidence) and mother Maude Peterson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Nels Peterson
b. ~1866
Source father
● Household
· direct · ~0.92
Father
T Peterson
b. ~1878
Source father
● Household
· direct · ~0.92
Father
Carl Peterson
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Maude Peterson
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Helen Peterson
Daughter · 1940 · age 30 · b. ~1910 · Illinois
★ You are viewing this record
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-t0627-00778-00185)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary M. Jones | 74 | Head | Retired | Illinois |
| 2 | George C. Schneiden | 52 | Head | Sales Manager | Minnesota |
| 3 | Mary R. Schneiden | 52 | Wife | Housewife | Minnesota |
| 4 | Lavina Date | 56 | Wife | Housewife | Illinois |
| 5 | Marie G. Price | 73 | Head | Housewife | France |
| 6 | Theresa Newburger | 67 | Head | Housewife | Illinois |
| 7 | Karen E. Larson | 76 | Head | Housewife | Illinois |
| 8 | Jennie Gores | 71 | Head | Housewife | Illinois |
| 9 | Virginia Roberts | 41 | Head | Advertising | Illinois |
| 10 | Julia Collins | 57 | Head | Teacher | Iowa |
| 11 | Dora Dearborn | 75 | Head | Housewife | Illinois |
| 12 | Roberta Mather | 57 | Head | Housewife | Wisconsin |
| 13 | Rosanna Warner | 70 | Head | Housewife | Wisconsin |
| 14 | Maud F. Taylor | 39 | Head | Buyer | Iowa |
| 15 | Catherine R. Cassaigne | 74 | Head | Housewife | New York |
| 16 | Lilly Tietz | 54 | Head | Housewife | Illinois |
| 17 | Zella Marshall | 62 | Head | Nurse | Illinois |
| 18 | John Frost | 49 | Head | Advertising | Wisconsin |
| 19 | Sadye Frost | 42 | Wife | Housewife | Illinois |
| 20 | Bobbie Frost | 13 | Daughter | — | Illinois |
| 21 | Berchell Busch | 68 | Head | Housewife | New York |
| 22 | — | None | — | — | — |
| 23 | Cornelia Nehring | 78 | Head | Housewife | Wisconsin |
| 24 | Caroline Nehring | 48 | Daughter | Secretary | Illinois |
| 25 | Thomas A. Copeland | 31 | Son | Investment | Illinois |
| 26 | Nellie A. Copeland | 64 | Head | Housewife | Illinois |
| 27 | John Copeland | 35 | Son | Salesman | Illinois |
| 28 | Hattie Rosenheim | 57 | Head | Retired | Illinois |
| 29 | Septor R. Chase | 25 | Head | Salesman | Indiana |
| 30 | Marion Cotton | 54 | Head | Nurse | New York |
| 31 | T. John Peterson | 62 | Head | Retired | Michigan |
| 32 | Maude Peterson | 60 | Wife | Housewife | Michigan |
| 33 | Helen Peterson THIS PERSON | 30 | Daughter | Housewife | Illinois |
| 34 | Robert K. Strach | 63 | Head | Attorney | Canada |
| 35 | Hannah Strach | 60 | Wife | Housewife | Canada |
| 36 | Richard Carr | 55 | Head | Engineer | Virginia |
| 37 | Florence Carr | 39 | Wife | Housewife | Wisconsin |
| 38 | Louise Herzog | 52 | Head | Housewife | Wisconsin |
| 39 | Margaret Thalman | 65 | Head | Business Manager | Illinois |
| 40 | Elizabeth Stroude | 76 | Head | Retired | Michigan |
Pedigree Summary
Helen
Gen 1 · 4 parents
~0.92
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)