JB
James Bradley — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this James Bradley across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Joseph & Catherine — first a head (b.~1905), then head of a 5-person household.
Age 35
b. ~1905
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Bradley |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Lineman |
| Industry | Electric Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2500 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Lineman |
| Township / Ward | Chicago |
| Est. Birth Year | ~1905 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| James Bradley | Head | — | 35 | ~1905 |
| Nora West | Other | — | 65 | ~1875 |
| James Bradley | Son | — | 3 | ~1937 |
| Roger Bradley | Son | — | 2 | ~1938 |
| Margaret Bradley | Spouse | — | 35 | ~1905 |
Census Appearances
1920
Cook, Illinois
Son, age 17
Cook, Illinois · implied b. ~1903 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bradley |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Head, age 27
Cook, Illinois · implied b. ~1903 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bradley |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 26 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Proprietor |
| Industry | Dairy |
| Class of Worker | E |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 62.50 |
| Radio Set | R |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 35
Cook-County, Illinois · implied b. ~1905 — 5 household members
| Surname | Bradley |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Lineman |
| Industry | Electric Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2500 |
| 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 James Bradley across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Joseph Bradley (~0.92 confidence) and mother Catherine Bradley (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joseph Bradley
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Catherine Bradley
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Bradley
Head · 1940 · age 35 · b. ~1905 · 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-t0627-00938-00587)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Robert Mcnamara | 50 | Head | Telephone Repairman | Illinois |
| 42 | Theresa Mcnamara | 43 | Wife | — | Illinois |
| 43 | Billy Mcnamara | 12 | Daughter | — | Illinois |
| 44 | James Bradley THIS PERSON | 35 | Head | Lineman | Illinois |
| 45 | Margaret Bradley | 35 | Wife | — | Illinois |
| 46 | James Bradley | 3 | Son | — | Illinois |
| 47 | Roger Bradley | 2 | Son | — | Illinois |
| 48 | Nora West | 65 | Mother-in-law | — | Eire |
| 49 | William Tritzner | 47 | Head | Realtor | Illinois |
| 50 | Ethel Tritzner | 46 | Wife | — | Illinois |
| 51 | Lucille Tritzner | 22 | Daughter | Check Sorter | Illinois |
| 52 | Charlotte Tritzner | 18 | Daughter | Comptometer Operator | Illinois |
| 53 | William Tritzner | 16 | Son | — | Illinois |
| 54 | Ida Strand | 55 | Aunt | — | Sweden |
| 55 | Peter Klingelschmitt | 49 | Head | Butcher | Illinois |
| 56 | Hannah Klingelschmitt | 49 | Wife | — | Wisconsin |
| 57 | Frances Klingelschmitt | 25 | Daughter | Secretary | Illinois |
| 58 | Joseph Klingelschmitt | 23 | Son | Butcher | Illinois |
| 59 | Ramona Klingelschmitt | 21 | Daughter | Secretary | Illinois |
| 60 | Geraldine Klingelschmitt | 15 | Daughter | — | Illinois |
| 61 | Leo Klingelschmitt | 10 | Son | — | Illinois |
| 62 | Charles Hayda | 58 | Head | Clothing Designer | Wisconsin |
| 63 | Charles Hayda | 27 | Son | Law Clerk | Illinois |
| 64 | James Hayda | 25 | Son | Clerk | Illinois |
| 65 | Anna Cullen | 78 | Mother-in-law | — | Germany |
| 66 | William Reid | 31 | Head | Salesman | Illinois |
| 67 | Bernice Reid | 35 | Wife | — | Illinois |
| 68 | Jean Reid | 13 | Daughter | — | Illinois |
| 69 | Rollin Warner | 30 | Head | Sales Engineer | Iowa |
| 70 | Lucille Warner | 55 | Wife | — | Iowa |
| 71 | Roly Johnson | 56 | Head | Porter | Indiana |
| 72 | Jennie Johnson | 27 | Wife | Assembler | Illinois |
| 73 | Jerome Compton | 33 | Head | Blender | Missouri |
| 74 | Ealee Compton | 25 | Wife | — | Illinois |
| 75 | Ronald Compton | 7 | Son | — | Illinois |
| 76 | Joseph Ballard | 25 | Head | Rate Clerk | Kentucky |
| 77 | Mary Ballard | 23 | Wife | — | Illinois |
| 78 | Laverne Ballard | 5 | Son | — | Illinois |
| 79 | William Akers | 34 | Head | Accountant | Illinois |
| 80 | Eileen Akers | 35 | Wife | — | 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)