JC
James Cavanaugh — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this James Cavanaugh across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Frank & Olga — first a head (b.~1909), then head of a 4-person household.
Age 31
b. ~1909
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Cavanaugh |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Electrician |
| Industry | Steel Mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 900 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Electrician |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1909 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Patricia Cavanaugh | Daughter | — | 6 | ~1934 |
| Robert Cavanaugh | Son | — | 10 | ~1930 |
| James Cavanaugh | Head | — | 31 | ~1909 |
| Irene Cavanaugh | Spouse | — | 30 | ~1910 |
Census Appearances
1920
Cook, Illinois
Son, age 11
Cook, Illinois · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cavanaugh |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Germany |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Head, age 21
Cook, Illinois · implied b. ~1909 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cavanaugh |
| Given Name | James H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 19 |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Germany |
| Occupation | Recorder |
| Industry | steel mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 35 |
| Radio Set | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 31
Cook-County, Illinois · implied b. ~1909 — 4 household members
| Surname | Cavanaugh |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Electrician |
| Industry | Steel Mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 900 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| 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 James Cavanaugh across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Frank Cavanaugh (~0.92 confidence) and mother Olga Cavanaugh (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Cavanaugh
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Olga Cavanaugh
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Cavanaugh
Head · 1940 · age 31 · b. ~1909 · 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-t0627-00942-00149)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Michael Duvall | 1 | Son | — | W. Virginia |
| 42 | Mary Johnson | 48 | Head | Inverter | Illinois |
| 43 | June Johnson | 20 | Daughter | Inverter | Illinois |
| 44 | Marion Johnson | 17 | Daughter | — | Illinois |
| 45 | Anthony F. Killer | 30 | Head | Safety Inspector | Ohio |
| 46 | Louise Killer | 29 | Wife | — | W. Virginia |
| 47 | Anthony J. Killer | 10 | Son | — | Illinois |
| 48 | Richard J. Killer | 9 | Son | — | Illinois |
| 49 | Robert J. Killer | 5 | Son | — | Illinois |
| 50 | Anna Eichler | 57 | Head | — | Czechoslovakia |
| 51 | Mary Eichler | 17 | Daughter | — | Illinois |
| 52 | James Cavanaugh THIS PERSON | 31 | Head | Electrician | Illinois |
| 53 | Irene Cavanaugh | 30 | Wife | Cashier | Texas |
| 54 | Robert Cavanaugh | 10 | Son | — | Illinois |
| 55 | Patricia Cavanaugh | 6 | Daughter | — | Illinois |
| 56 | Joseph Baumgartner | 41 | Head | Machinist | Illinois |
| 57 | Mildred Baumgartner | 42 | Wife | — | Illinois |
| 58 | Nick Reitz | 40 | Lodger | Fireman | Illinois |
| 59 | Henry Meincke | 56 | Head | Case Loader | New York |
| 60 | Augusta Meincke | 54 | Wife | — | Illinois |
| 61 | Henry Jr. Meincke | 22 | Son | Landscape Gardener | Illinois |
| 62 | Arthur Meincke | 21 | Son | Gasoline & Oil Refinery Janitor | Indiana |
| 63 | Ruth Meincke | 20 | Daughter | — | Indiana |
| 64 | Florence Meincke | 17 | Daughter | — | Indiana |
| 65 | Arthur Kleman | 43 | Lodger | Accounting Clerk | Illinois |
| 66 | Louis Janovyck | 31 | Head | Steel Mill | Illinois |
| 67 | Mary Janovyck | 31 | Wife | — | Arkansas |
| 68 | Lawrence Janovyck | 5 | Son | — | Illinois |
| 69 | Albert Janovyck | 2 | Son | — | Illinois |
| 70 | John Hebert | 60 | Lodger | Steel Inspector | Sweden |
| 71 | Jan Zabirofsky | 62 | Head | Watchman | Poland |
| 72 | Anna Zabirofsky | 55 | Wife | — | Poland |
| 73 | Frank Zabirofsky | 32 | Son | Bldg. Contractor | Illinois |
| 74 | Nellie Zabirofsky | 29 | Daughter | Feeder | Illinois |
| 75 | Leo Zabirofsky | 27 | Son | Laborer | Illinois |
| 76 | Paul Zabirofsky | 19 | Son | Laborer | Illinois |
| 77 | Anthony Zabirofsky | 17 | Son | Caddy | Illinois |
| 78 | Harry Zabirofsky | 13 | Son | — | Illinois |
| 79 | Anne Zabirofsky | 15 | Daughter | — | Illinois |
| 80 | Joan Zabirofsky | 9 | Daughter | — | Illinois |
Pedigree Summary
James
Gen 1 · 2 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)