HB
Harold Brown — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Harold Brown across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Wendell & Josephine — first a son (b.~1918), then head of a 4-person household.
Age 22
b. ~1918
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Brown |
| Given Name | Harold G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Berwyn |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Time keeper |
| Industry | Electric Light Transit |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1325 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Time Keeper |
| Township / Ward | Berwyn |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Harold | Age | Birth yr |
|---|---|---|---|---|
| Mary Brown | Daughter | — | 14 | ~1926 |
| Michael Brown | Head | — | 53 | ~1887 |
| Harold Brown | Son | — | 22 | ~1918 |
| Josephine Brown | Spouse | — | 56 | ~1884 |
Census Appearances
1920
Cook, Illinois
Son, age 2
Cook, Illinois · implied b. ~1918 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 12
Cook, Illinois · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 22
Cook-County, Illinois · implied b. ~1918 — 4 household members
| Surname | Brown |
| Given Name | Harold G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Berwyn |
| 1935 Residence (County) | Cook |
| Occupation | Time keeper |
| Industry | Electric Light Transit |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1325 |
| Highest Grade | H 3 |
| 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 Harold Brown across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Wendell Brown (~0.92 confidence) and mother Josephine Brown (~0.92 confidence) and father Michael Brown (~0.92 confidence) and mother Josephine Brown (~0.92 confidence) and father Michael Brown (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Wendell Brown
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Josephine Brown
b. ~1884
Source mother
● Household
· direct · ~0.92
Father
Michael Brown
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Josephine Brown
b. ~1885
Source mother
● Household
· direct · ~0.92
Father
Michael Brown
b. ~1887
Source father
● Household
· direct · ~0.92
This person
Anchor record
Harold Brown
Son · 1940 · age 22 · b. ~1918 · Illinois
★ You are viewing this record
Sibling
Mary Brown
Sibling · 1940 · age 14
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-t0627-00773-00303)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Anne L. Bloom | 38 | Wife | No | Illinois |
| 2 | Mary A. Bloom | 3 | Daughter | — | Illinois |
| 3 | Edward M. Baneck | 34 | Head | Sewing Machine Salesman | Illinois |
| 4 | Helen J. Baneck | 28 | Wife | Billing Clerk | Illinois |
| 5 | Frank G. Chelmindki | 42 | Head | Punch Press Operator | Illinois |
| 6 | Anna J. Chelmindki | 40 | Wife | Bench Hand | Illinois |
| 7 | Lorraine M. Chelmindki | 15 | Daughter | — | Illinois |
| 8 | Alvina M. Chelmindki | 15 | Daughter | — | Illinois |
| 9 | Anna Kujawa | 74 | Aunt | No | Poland |
| 10 | Michael J. Brown | 53 | Head | Watchman | Illinois |
| 11 | Josephine A. Brown | 56 | Wife | No | Illinois |
| 12 | Harold G. Brown THIS PERSON | 22 | Son | Time Keeper | Illinois |
| 13 | Mary F. Brown | 14 | Daughter | No | Illinois |
| 14 | Louis S. Papstnik | 60 | Head | Stenographer | Yugoslavia |
| 15 | Mary Papstnik | 57 | Wife | Machine Operator | Yugoslavia |
| 16 | Louis J. Papstnik | 27 | Son | Apprentice | Illinois |
| 17 | Elizabeth Papstnik | 25 | Daughter | Supervisor | Illinois |
| 18 | Charles Jedinak | 26 | Son-in-law | Repairman | Yugoslavia |
| 19 | Julia Jedinak | 25 | Daughter | Assembler | Illinois |
| 20 | Frank Majer | 61 | Head | Foreman | Czechoslovakia |
| 21 | Anna Majer | 58 | Wife | No | Czechoslovakia |
| 22 | William Majer | 30 | Son | Tool Maker | Illinois |
| 23 | Le Roy G. Vahuly | 35 | Head | Switchman | Illinois |
| 24 | Anna G. Vahuly | 34 | Wife | No | Illinois |
| 25 | Allan L. Vahuly | 7 | Son | — | Illinois |
| 26 | William G. Gretzer | 48 | Head | Auditing Clerk | Illinois |
| 27 | Marie Gretzer | 48 | Wife | No | Illinois |
| 28 | Robert E. Gretzer | 17 | Son | No | Illinois |
| 29 | Howard J. Gretzer | 15 | Son | No | Illinois |
| 30 | Clarence R. Hack | 36 | Head | Safety And Health Man | Illinois |
| 31 | Irene G. Hack | 19 | Daughter | No | Illinois |
| 32 | Robert J. Hack | 5 | Son | — | Illinois |
| 33 | John Viperches | 57 | Head | Repairman | Czechoslovakia |
| 34 | Emelia Viperches | 46 | Wife | No | Illinois |
| 35 | John Viperches | 24 | Son | No | Illinois |
| 36 | Albert Kuck | 27 | Nephew | Lithographer | Illinois |
| 37 | Albert C. Voll | 61 | Head | Maintenance Man | Germany |
| 38 | Anna C. Voll | 61 | Wife | No | Germany |
| 39 | Rolland Voll | 30 | Son | Assembler | Illinois |
| 40 | Roy Voll | 22 | Son | Automobile Mechanic | Illinois |
Pedigree Summary
Harold + 1 sibling
Gen 1 · 5 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)