EP
Ethel Peterson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Ethel Peterson across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1920), then head of a 9-person household.
Age 20
b. ~1920
Female
Daughter
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Peterson |
| Given Name | Ethel E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same house |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1920 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ethel | Age | Birth yr |
|---|---|---|---|---|
| Hazel Peterson | Daughter | — | 22 | ~1918 |
| Grace Peterson | Daughter | — | 3 | ~1937 |
| Helen Peterson | Daughter | — | 17 | ~1923 |
| Chas Wallin | Other | — | 71 | ~1869 |
| Elof Peterson | Head | — | 45 | ~1895 |
| William Peterson | Son | — | 15 | ~1925 |
| Ethel Peterson | Daughter | — | 20 | ~1920 |
| Eleanor Peterson | Daughter | — | 10 | ~1930 |
| Edith Peterson | Spouse | — | 45 | ~1895 |
Census Appearances
1930
Cook, Illinois
Daughter, age 10
Cook, Illinois · implied b. ~1920 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Ethel |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Cook-County, Illinois
Daughter, age 20
Cook-County, Illinois · implied b. ~1920 — 9 household members
| Surname | Peterson |
| Given Name | Ethel E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same house |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 Ethel Peterson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Ethel Peterson
Daughter · 1940 · age 20 · b. ~1920 · Illinois
★ You are viewing this record
Sibling
Hazel Peterson
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Peterson
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Peterson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleanor Peterson
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Grace Peterson
Sibling · 1940 · age 3
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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
29 people indexed on this census page (nara:1940:m-t0627-01016-00809)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Eric Peterson | 52 | Head | Stone Mason | Sweden |
| 42 | Esther Peterson | 41 | Wife | — | Sweden |
| 43 | Alice Peterson | 18 | Daughter | Stenographer | Illinois |
| 44 | Wilbur Peterson | 15 | Son | — | Illinois |
| 45 | Elaine Peterson | 13 | Daughter | — | Illinois |
| 46 | Rudolph Steinhausen | 40 | Head | Butcher | Illinois |
| 47 | Catherine Steinhausen | 35 | Wife | — | Illinois |
| 48 | William Steinhausen | 13 | Son | — | Illinois |
| 49 | Catherine D. Steinhausen | 8 | Daughter | — | Illinois |
| 50 | Robert Steinhausen | 4 | Son | — | Illinois |
| 51 | Elof Peterson | 45 | Head | Brick Contractor | Sweden |
| 52 | Edith E. Peterson | 45 | Wife | — | Sweden |
| 53 | Hazel E. Peterson | 22 | Daughter | Statement Clerk | Illinois |
| 54 | Ethel E. Peterson THIS PERSON | 20 | Daughter | — | Michigan |
| 55 | Helen Peterson | 17 | Daughter | — | Illinois |
| 56 | William Peterson | 15 | Son | — | Illinois |
| 57 | Eleanor N. Peterson | 10 | Daughter | — | Illinois |
| 58 | Grace C. Peterson | 3 | Daughter | — | Illinois |
| 59 | Chas. F. Wallin | 71 | Father-in-law | — | Sweden |
| 60 | William Rutenburg | 39 | Head | Salesman | Illinois |
| 61 | Jeanette Rutenburg | 42 | Wife | — | Norway |
| 62 | William Jr. Rutenburg | 12 | Son | — | Illinois |
| 63 | Alex Olson | 48 | Head | Carpenter | Sweden |
| 64 | Lydia Olson | 47 | Wife | — | Sweden |
| 65 | Margaret Olson | 20 | Daughter | — | Illinois |
| 66 | Robert Olson | 13 | Son | — | Illinois |
| 67 | Carl Olson | 11 | Son | — | Illinois |
| 68 | Louis E. Herman | 53 | Head | Motion Picture Operator | Illinois |
| 69 | Elizabeth Herman | 55 | Wife | — | 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)