AP
Arthur Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Arthur Peterson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Emily — first a son (b.~1919), then head of a 9-person household.
Age 21
b. ~1919
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Peterson |
| Given Name | Arthur |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Laborer |
| Industry | W.P.A. Building |
| Class of Worker | GW |
| Hours Worked | 52 |
| Income (1939) | 288 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Laborer |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1919 |
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 Arthur | Age | Birth yr |
|---|---|---|---|---|
| Eleanor Peterson | Daughter | — | 27 | ~1913 |
| Emily Peterson | Head | — | 58 | ~1882 |
| Edgar Peterson | Son | — | 16 | ~1924 |
| Charles Konis | Son | — | 15 | ~1925 |
| Stanley Zatlak | Son | — | 25 | ~1915 |
| Walter Zatlak | Son | — | 25 | ~1915 |
| Edward Krol | Son | — | 17 | ~1923 |
| Robert Peterson | Son | — | 18 | ~1922 |
| Arthur Peterson | Son | — | 21 | ~1919 |
Census Appearances
1920
Cook, Illinois
Son, age
Cook, Illinois · implied b. ~1920 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Arthur |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Germany |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 11
Cook, Illinois · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Arthur |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Germany |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 21
Cook-County, Illinois · implied b. ~1919 — 9 household members
| Surname | Peterson |
| Given Name | Arthur |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Laborer |
| Industry | W.P.A. Building |
| Class of Worker | GW |
| Hours Worked | 52 |
| Income (1939) | 288 |
| Highest Grade | H 2 |
| 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 Arthur Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Emily Peterson (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Emily Peterson
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Arthur Peterson
Son · 1940 · age 21 · b. ~1919 · Illinois
★ You are viewing this record
Sibling
Stanley Zatlak
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Zatlak
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Peterson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Konis
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Krol
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleanor Peterson
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edgar Peterson
Sibling · 1940 · age 16
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
22 people indexed on this census page (nara:1940:m-t0627-00964-00255)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jasper Romero | 33 | Head | Section Hand | Mexico |
| 2 | Annabella Romero | 68 | Mother | — | Mexico |
| 3 | Aurella Romero | 17 | Niece | — | Mexico |
| 4 | Stella Cieslak | 27 | Daughter | House Work | Illinois |
| 5 | George Kalinski | 30 | Head | Grinder | Illinois |
| 6 | Mildred Kalinski | 28 | Wife | Coil Winder | Czechoslovakia |
| 7 | Edmund Kalinski | 5 | Son | — | Illinois |
| 8 | Robert Kalinski | 2 | Son | — | Illinois |
| 9 | Leo Bach | 30 | Head | Laborer | Illinois |
| 10 | Anna Bach | 28 | Wife | — | Illinois |
| 11 | Valentine Budovich | 49 | Head | Elevator Oper | Poland |
| 12 | Marion Budovich | 50 | Wife | — | Poland |
| 13 | Richard Budovich | 11 | Son | — | Illinois |
| 14 | Emily Peterson | 58 | Head | — | Germany |
| 15 | Eleanor Peterson | 27 | Daughter | Office Clerk | Illinois |
| 16 | Arthur Peterson THIS PERSON | 21 | Son | Laborer | Illinois |
| 17 | Robert Peterson | 18 | Son | — | Illinois |
| 18 | Edgar Peterson | 16 | Son | — | Illinois |
| 19 | Stanley Zatlak | 25 | Son | — | Illinois |
| 20 | Walter Zatlak | 25 | Son | — | Illinois |
| 21 | Charles Konis | 15 | Son | — | Illinois |
| 22 | Edward Krol | 17 | Son | New Worker | Illinois |
Related Census Records
Pedigree Summary
Arthur + 7 siblings
Gen 1 · 1 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)