LB
Leonard Brown — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Leonard Brown across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1899), then head of a 8-person household.
Age 41
b. ~1899
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Brown |
| Given Name | Leonard |
| Relationship to Head | head |
| Sex | M |
| Color / Race | Black |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | City of Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Janitor |
| Industry | Public school |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 1400 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Janitor |
| Township / Ward | City Of Chicago |
| Est. Birth Year | ~1899 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Leonard | Age | Birth yr |
|---|---|---|---|---|
| Leonard Brown | Head | — | 41 | ~1899 |
| Douglas Brown | Son | — | 3 | ~1937 |
| Shirley Brown | Daughter | — | 10 | ~1930 |
| Ronald Brown | Son | — | 8 | ~1932 |
| Eokanella Brown | Spouse | — | 30 | ~1910 |
| Gwendolyn Brown | Daughter | — | 11 | ~1929 |
| Oliver Brown | Son | — | 5 | ~1935 |
| Leonard Brown | Son | — | 12 | ~1928 |
Census Appearances
1930
Cook, Illinois
Other, age 31
Cook, Illinois · implied b. ~1899 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Leonard |
| Relationship to Head | G. Son |
| Sex | M |
| Color / Race | Black |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 27 |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | Tennessee |
| Occupation | Lubricator |
| Industry | Auto service sta. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Cook-County, Illinois
Head, age 41
Cook-County, Illinois · implied b. ~1899 — 8 household members
| Surname | Brown |
| Given Name | Leonard |
| Relationship to Head | head |
| Sex | M |
| Color / Race | Black |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | City of Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Janitor |
| Industry | Public school |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 1400 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Leonard Brown across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Leonard Brown
Head · 1940 · age 41 · b. ~1899 · 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
39 people indexed on this census page (nara:1940:m-t0627-00977-00795)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Fanny Mize | 65 | mother | — | Mississippi |
| 2 | Leonard Brown THIS PERSON | 41 | head | Janitor | Pennsylvania |
| 3 | Eokanella | Eokanella Brown | 30 | wife | — | Pennsylvania |
| 4 | Leonard Brown | 12 | son | — | Illinois |
| 5 | Gwendolyn Brown | 11 | daughter | — | Illinois |
| 6 | Shirley Brown | 10 | daughter | — | Illinois |
| 7 | Ronald Brown | 8 | son | — | Illinois |
| 8 | Oliver Brown | 5 | son | — | Illinois |
| 9 | Douglas Brown | 3 | son | — | Illinois |
| 10 | Mary Hyde | 69 | head | — | Tennessee |
| 11 | Loretta Cohen | 10 | daughter | — | Illinois |
| 12 | Precilla Buritt | Pruitt | 45 | head | — | Mississippi |
| 13 | William Diggs | 71 | boarder | — | Washington DC |
| 14 | Augusta J. Weber | 91 | head | — | Illinois |
| 15 | Daisy A. Weber | 69 | wife | — | Illinois |
| 16 | Henrietta King | 33 | head | Waitress | Louisiana |
| 17 | Edward Thompson | 47 | boarder | Laborer | Louisiana |
| 18 | William Upchurch | 38 | boarder | Clerk | Tennessee |
| 19 | Fred Baines | 39 | boarder | Porter | Tennessee |
| 20 | Sarah Fox | 63 | boarder | Laundress | Mississippi |
| 21 | Willie Nae Randolph | 23 | head | Seamstress | Illinois |
| 22 | James Randolph | 6 | son | — | Illinois |
| 24 | Rose King | 37 | head | — | Mississippi |
| 25 | Obbie Anthony | 35 | head | Truck Driver | Alabama |
| 26 | Alberta Anthony | 24 | wife | — | Alabama |
| 27 | Jennie Johnson | 47 | head | Maid | Tennessee |
| 28 | Timothy Anderson | 49 | boarder | — | Mississippi |
| 29 | Greff Ransom | 63 | head | Laborer | Tennessee |
| 30 | Dora Ransom | 65 | wife | — | Tennessee |
| 31 | James Lumpkin | 27 | boarder | Laborer | Georgia |
| 32 | Fanny Thompson | 39 | boarder | Packer | Tennessee |
| 33 | Manuel Lowe | 27 | head | Laborer | Mississippi |
| 34 | Maggie Zanders | 29 | niece | Seamstress | Tennessee |
| 35 | James Zanders | 4 | son | — | Illinois |
| 36 | Emma Merritt | 25 | head | — | Alabama |
| 37 | James Merritt | 3 | son | — | Illinois |
| 38 | William Merritt | 2 | son | — | Illinois |
| 39 | Bertha M. Turner | 32 | head | Seamstress | Mississippi |
| 40 | James Turner | 4 | son | — | Illinois |
Related Census Records
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)