RC
Robert Caldwell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Robert Caldwell across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Fred & Robert — first a son (b.~1918), then head of a 3-person household.
Age 22
b. ~1918
Male
Son
Born: Montana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Caldwell |
| Given Name | Robert |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Berwyn City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Office |
| Industry | newspaper |
| Class of Worker | PW |
| Hours Worked | 3 |
| Income (1939) | 140 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Occupation | Office |
| Township / Ward | Berwyn City |
| Est. Birth Year | ~1918 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Caldwell | Son | — | 22 | ~1918 |
| Fred Caldwell | Son | — | 19 | ~1921 |
| Julia Caldwell | Head | — | 42 | ~1898 |
Census Appearances
1920
Cook, Illinois
Son, age 1
Cook, Illinois · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Caldwell |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Nebraska |
| Mother's Birthplace | Wisconsin |
| Occupation | none |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1930
Cook, Illinois
Son, age 12
Cook, Illinois · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Caldwell |
| Given Name | Robert G |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Nebraska |
| Mother's Birthplace | Wisconsin |
| Occupation | Newsboy |
| Industry | Regent Stand |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1940
Cook-County, Illinois
Son, age 22
Cook-County, Illinois · implied b. ~1918 — 3 household members
| Surname | Caldwell |
| Given Name | Robert |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Berwyn City |
| 1935 Residence (County) | Cook |
| Occupation | Office |
| Industry | newspaper |
| Class of Worker | PW |
| Hours Worked | 3 |
| Income (1939) | 140 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
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 Robert Caldwell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Fred Caldwell (~0.92 confidence) and mother Robert Caldwell (~0.92 confidence) and mother Julia Caldwell (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Fred Caldwell
b. ~1896
Source father
● Household
· direct · ~0.92
Mother
Robert Caldwell
b. ~1897
Source mother
● Household
· direct · ~0.92
Mother
Julia Caldwell
b. ~1898
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Caldwell
Son · 1940 · age 22 · b. ~1918 · Illinois
★ You are viewing this record
Sibling
Fred Caldwell
Sibling · 1940 · age 19
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
40 people indexed on this census page (nara:1940:m-t0627-00772-00585)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Tillie Pederson | 21 | wife | X | Germany |
| 2 | Carol Pederson | 1 | daughter | — | Illinois |
| 3 | Leonard Strong | 47 | head | Payroll Investigator | Illinois |
| 4 | Constance Strong | 47 | wife | No | Illinois |
| 5 | William Lindner | 26 | head | Salesman | Illinois |
| 6 | Jane Lindner | 23 | wife | No | Illinois |
| 7 | Julia Caldwell | 42 | head | Teacher | Tennessee |
| 8 | Robert Caldwell THIS PERSON | 22 | son | Office | Montana |
| 9 | Fred Caldwell | 19 | son | Laborer | Montana |
| 10 | Laurence Kuska | 41 | head | Attorney | Minnesota |
| 11 | Margaret Kuska | 29 | wife | No | Illinois |
| 12 | Robert Kuska | 2 | son | — | Illinois |
| 13 | Edward Kuska | 2 | son | — | Illinois |
| 14 | John Lonergan | 36 | head | Salesman | Illinois |
| 15 | Elsie Lonergan | 33 | wife | Secretary | Illinois |
| 16 | Jerry Isaacson | 43 | head | Machinist | Illinois |
| 17 | Ella Isaacson | 43 | wife | Comptometer Operator | Illinois |
| 18 | Roland Reynolds | 24 | head | Milk | Minnesota |
| 19 | Mildred Reynolds | 23 | wife | Clerk | Illinois |
| 20 | Henry Rosenmeier | 30 | head | Labor Division Clerk | Iowa |
| 21 | Florence Rosenmeier | 34 | wife | No | Illinois |
| 22 | James Rosenmeier | 3 | son | — | Illinois |
| 23 | Gladys Deabler | 35 | sister-in-law | Stenographer | Illinois |
| 24 | Marion Langley | 27 | head | Janitor | Arkansas |
| 25 | Edna Langley | 29 | wife | No | Illinois |
| 26 | Richard Langley | 7 | son | — | Illinois |
| 27 | Charlotte Langley | 1 | daughter | — | Illinois |
| 28 | Frank Kotalik | 50 | head | Doctor | Illinois |
| 29 | Rose Kotalik | 46 | wife | No | Illinois |
| 30 | George Kotalik | 23 | son | No | Illinois |
| 31 | Robert Kotalik | 18 | son | No | Illinois |
| 32 | Mary Baster | 66 | mother-in-law | No | Bohemia |
| 33 | John Johnston | 54 | head | Die Maker | Sweden |
| 34 | Mabel Johnston | 51 | wife | No | Michigan |
| 35 | Roger Johnston | 17 | son | No | Illinois |
| 36 | Irvin Metrow | 39 | head | Electrical Engineer | Wisconsin |
| 37 | Katherine Metrow | 37 | wife | No | Wisconsin |
| 38 | Margo Metrow | 6 | daughter | — | Wisconsin |
| 39 | John Anderson | 81 | head | No | Sweden |
| 40 | Matilda Anderson | 71 | wife | No | Norway |
Pedigree Summary
Robert + 1 sibling
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)