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Ethel Brown — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Ethel Brown across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1931), then head of a 10-person household.
Age 9
b. ~1931
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Brown |
| Given Name | Ethel |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Robbins Village |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | 3 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Robbins Village |
| Est. Birth Year | ~1931 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ethel | Age | Birth yr |
|---|---|---|---|---|
| Ellena Brown | Daughter | — | 4 | ~1936 |
| Ethel Brown | Daughter | — | 9 | ~1931 |
| Mabel Brown | Daughter | — | 11 | ~1929 |
| Rosie Brown | Daughter | — | 7 | ~1933 |
| Elsie Brown | Daughter | — | 6 | ~1934 |
| Alice Brown | Daughter | — | 14 | ~1926 |
| Frank Brown | Head | — | 51 | ~1889 |
| Joseph Brown | Son | — | 15 | ~1925 |
| James Brown | Son | — | 25 | ~1915 |
| Ollie Brown | Spouse | — | 44 | ~1896 |
Census Appearances
1930
Cook, Illinois
Daughter, age 1
Cook, Illinois · implied b. ~1929 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Ethel |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Oklahoma |
| Mother's Birthplace | Mississippi |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 9
Cook-County, Illinois · implied b. ~1931 — 10 household members
| Surname | Brown |
| Given Name | Ethel |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Robbins Village |
| 1935 Residence (County) | Cook |
| Highest Grade | 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 Ethel Brown across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Ethel Brown
Daughter · 1940 · age 9 · b. ~1931 · Illinois
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Sibling
Alice Brown
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ellena Brown
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rosie Brown
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mabel Brown
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Brown
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elsie Brown
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Brown
Sibling · 1940 · age 15
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-t0627-00775-00563)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Lizzie Drake | 52 | Head | — | Illinois |
| 42 | Joseph Drake | 11 | Son | — | Illinois |
| 43 | Josephine Drake | 8 | Daughter | — | Illinois |
| 44 | Dorothy Drake | 7 | Daughter | — | Illinois |
| 45 | Mary Pritchett | 28 | Sister | Housekeeper | Alabama |
| 46 | Frances Pritchett | 7 | Niece | — | Alabama |
| 47 | Hercenda Pritchett | 4 | Niece | — | Alabama |
| 48 | John Newell | 48 | Head | Shoveler | Mississippi |
| 49 | James Smith | 40 | Head | Maintenance Man | Mississippi |
| 50 | Georgia Smith | 42 | Wife | — | Iowa |
| 51 | Leamon Smith | 13 | Son | — | Iowa |
| 52 | Desmona Smith | 11 | Daughter | — | Iowa |
| 53 | Barbara Smith | 9 | Daughter | — | Illinois |
| 54 | Antonia Smith | 6 | Daughter | — | Illinois |
| 55 | Chiquita Smith | 4 | Daughter | — | Illinois |
| 56 | Lilly Smith | 44 | Head | Seamstress | Kentucky |
| 57 | Martha Collins | 60 | Mother | — | Tennessee |
| 58 | Hercenda Collins | 39 | Sister | — | Kentucky |
| 59 | Frank Brown | 51 | Head | Shoveler | Georgia |
| 60 | Ollie Brown | 44 | Wife | — | Kentucky |
| 61 | James Brown | 25 | Son | Pin Boy | Georgia |
| 62 | Joseph Brown | 15 | Son | — | Georgia |
| 63 | Alice Brown | 14 | Daughter | — | Illinois |
| 64 | Mabel Brown | 11 | Daughter | — | Illinois |
| 65 | Ethel Brown THIS PERSON | 9 | Daughter | — | Illinois |
| 66 | Rosie May Brown | 7 | Daughter | — | Illinois |
| 67 | Elsie Brown | 6 | Daughter | — | Illinois |
| 68 | Ellena Brown | 4 | Daughter | — | Illinois |
| 69 | Henry Martin | 57 | Head | Stationary Fireman | Georgia |
| 70 | Hattie Martin | 52 | Wife | — | Mississippi |
| 71 | Aaron Stout | 33 | Head | Chauffeur | Ohio |
| 72 | Gladys Stout | 31 | Wife | — | Georgia |
| 73 | Andrew Stout | 12 | Son | — | Georgia |
| 74 | Daniel Stout | 9 | Son | — | Georgia |
| 75 | Alex Martin | 42 | Head | Truck Loader | Georgia |
| 76 | Mattie Martin | 31 | Wife | — | Georgia |
| 77 | Robert Martin | 10 | Son | — | Georgia |
| 78 | Maggie Thomas | 45 | Head | — | Georgia |
| 79 | Hobart Thomas | 15 | Son | — | Illinois |
| 80 | Lemmie Fears | 54 | Lodger | — | Georgia |
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)