CP
Clarence Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Clarence Peterson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Emil & Anna — first a head (b.~1912), then head of a 3-person household.
Age 28
b. ~1912
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Peterson |
| Given Name | Clarence |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | truck driver |
| Industry | roofers |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1100 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Truck Driver |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1912 |
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 Clarence | Age | Birth yr |
|---|---|---|---|---|
| Edna Peterson | Spouse | — | 28 | ~1912 |
| Wayne Peterson | Son | — | 7 | ~1933 |
| Clarence Peterson | Head | — | 28 | ~1912 |
Census Appearances
1920
Cook, Illinois
Son, age 8
Cook, Illinois · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 18
Cook, Illinois · implied b. ~1912 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | none |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 28
Cook-County, Illinois · implied b. ~1912 — 3 household members
| Surname | Peterson |
| Given Name | Clarence |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | truck driver |
| Industry | roofers |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1100 |
| Highest Grade | Hs 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 Clarence Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Emil Peterson (~0.92 confidence) and mother Anna Peterson (~0.92 confidence) and mother Anna Peterson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Emil Peterson
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Anna Peterson
b. ~1875
Source mother
● Household
· direct · ~0.92
Mother
Anna Peterson
b. ~1875
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Clarence Peterson
Head · 1940 · age 28 · b. ~1912 · 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-t0627-00990-00586)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Neil Peterson | 26 | Son | Cementer | Illinois |
| 2 | George Congialosi | 25 | Head | Truck Driver | Illinois |
| 3 | Margie Congialosi | 21 | Wife | — | Illinois |
| 4 | Clarence Peterson THIS PERSON | 28 | Head | Truck Driver | Illinois |
| 5 | Edna Peterson | 28 | Wife | — | Illinois |
| 6 | Wayne Peterson | 7 | Son | — | Illinois |
| 7 | Joseph Pistonecki | 69 | Head | Painter | Poland |
| 8 | Witalia Pistonecki | 58 | Wife | — | Poland |
| 9 | John Arnesik | 53 | Head | Pile Driver | Norway |
| 10 | Annie Arnesik | 55 | Wife | — | Norway |
| 11 | Arnold Arnesik | 29 | Son | Policeman | Illinois |
| 12 | Louise Williams | 56 | Head | — | Norway |
| 13 | Mabel Williams | 26 | Daughter | Checker | New York |
| 14 | Louise Williams | 23 | Daughter | Film Developer | Norway |
| 15 | Edward Nelson | 55 | Head | Painter | Illinois |
| 16 | William Nelson | 66 | Brother | Polisher | Illinois |
| 17 | Helena Huestead | 73 | Head | — | Norway |
| 18 | Matt Williams | 68 | Head | — | Wisconsin |
| 19 | Elizabeth Williams | 64 | Wife | — | Illinois |
| 20 | Fred Williams | 36 | Head | Freight Mover | Wisconsin |
| 21 | Madeline Williams | 27 | Wife | Stenographer | Illinois |
| 22 | Marie Williams | 4 | Daughter | — | Illinois |
| 23 | Joseph Williams | 2 | Son | — | Illinois |
| 24 | Harry Kymbel | 25 | Head | Machine Hand | Illinois |
| 25 | Lydia Kymbel | 24 | Wife | Coiler | Illinois |
| 26 | Adolph Swanson | 30 | Head | Electrical Estimator | Illinois |
| 27 | Amalia Swanson | 30 | Wife | — | Illinois |
| 28 | Marylyn Swanson | 8 | Daughter | — | Illinois |
| 29 | Anna Beck | 65 | Head | — | Germany |
| 30 | Jenny H. Howlett | 67 | Head | — | Eire |
| 31 | Lillian F. Howlett | 32 | Daughter | Stenographer | Illinois |
| 32 | Dorothy M. Howlett | 28 | Daughter | Stenographer | Illinois |
| 33 | Patrick Shannon | 45 | Head | Senior Clerk | California |
| 34 | Caroline Shannon | 44 | Wife | — | Illinois |
| 35 | Lorina Shannon | 18 | Daughter | — | New Hampshire |
| 36 | Ole Olsen | 68 | Head | — | Norway |
| 37 | Anna Olsen | 68 | Wife | — | Norway |
| 38 | Ole, Jr Olsen | 46 | Son | Laborer | Norway |
| 39 | Marie Kadlubowski | 47 | Head | — | Russia |
| 40 | Theodore Kadlubowski | 19 | Son | — | Illinois |
Pedigree Summary
Clarence
Gen 1 · 3 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)