LB
Louise Brown — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Louise Brown across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 13-person household.
Age 10
b. ~1930
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Brown |
| Given Name | Louise |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | G 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1930 |
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.
13 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Louise | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Brown | Daughter | — | 8 | ~1932 |
| Thomas Brown | Daughter | — | 6 | ~1934 |
| Mildred Brown | Daughter | — | 7 | ~1933 |
| Gertrude Brown | Daughter | — | 2 | ~1938 |
| Louise Brown | Daughter | — | 10 | ~1930 |
| Mary Brown | Daughter | — | 14 | ~1926 |
| John Brown | Head | — | 52 | ~1888 |
| Fred Brown | Son | — | 11 | ~1929 |
| John Brown | Son | — | 20 | ~1920 |
| Walter Brown | Son | — | 17 | ~1923 |
| Willard Brown | Son | — | 19 | ~1921 |
| James Brown | Son | — | 22 | ~1918 |
| Grace Brown | Spouse | — | 43 | ~1897 |
Census Appearances
1930
Cook, Illinois
Daughter, age
Cook, Illinois · implied b. ~1930 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Louise |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Georgia |
| Mother's Birthplace | Georgia |
| Occupation | none |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 10
Cook-County, Illinois · implied b. ~1930 — 13 household members
| Surname | Brown |
| Given Name | Louise |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Highest Grade | G 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 Louise Brown across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Louise Brown
Daughter · 1940 · age 10 · b. ~1930 · Illinois
★ You are viewing this record
Sibling
Mildred Brown
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Willard Brown
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Fred Brown
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Brown
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Brown
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Brown
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Brown
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Brown
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gertrude Brown
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
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-t0627-00922-00709)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Baster Williams | 12 | son | — | Illinois |
| 2 | Ida Mae Williams | 10 | daughter | — | Illinois |
| 3 | Odessa Williams | 8 | daughter | — | Illinois |
| 4 | Charles Williams | 7 | son | — | Illinois |
| 5 | Delores Williams | 6 | daughter | — | Illinois |
| 6 | Ruth Williams | 2 | daughter | — | Illinois |
| 7 | John Brown | 52 | head | — | Georgia |
| 8 | Grace Brown | 43 | wife | — | Georgia |
| 9 | James Brown | 22 | son | New Worker | Georgia |
| 10 | John Jr Brown | 20 | son | Toy Maker | Georgia |
| 11 | Willard Brown | 19 | son | Toy Maker | Georgia |
| 12 | Walter Brown | 17 | son | New Worker | Illinois |
| 13 | Mary Brown | 14 | daughter | — | Illinois |
| 14 | Fred Brown | 11 | son | — | Illinois |
| 15 | Louise Brown THIS PERSON | 10 | daughter | — | Illinois |
| 16 | Elizabeth Brown | 8 | daughter | — | Illinois |
| 17 | Mildred Brown | 7 | daughter | — | Illinois |
| 18 | Thomas Brown | 6 | daughter | — | Illinois |
| 19 | Gertrude Brown | 2 | daughter | — | Illinois |
| 20 | Hubert Matthews | 49 | head | Night Watchman | Mississippi |
| 21 | Delia Matthews | 48 | wife | Maid | Mississippi |
| 22 | Elijah Matthews | 24 | son | Truck Loader | Mississippi |
| 23 | Mary Matthews | 21 | daughter | — | Mississippi |
| 24 | Ethel B. Matthews | 3 | granddaughter | — | Illinois |
| 25 | Celestine Matthews | 2 | daughter | — | Illinois |
| 26 | Shirley Matthews | 0 | daughter | — | Illinois |
| 27 | Lorrine Johnson | 43 | head | — | Alabama |
| 28 | Naomi Johnson | 44 | sister | — | Alabama |
| 29 | Fannie N Keys | 16 | niece | — | Alabama |
| 30 | E. S. Johnson | 50 | lodger | Section Hand | Alabama |
| 31 | Wyatt Robinson | 69 | head | — | Kentucky |
| 32 | William Woods | 79 | lodger | — | Virginia |
| 33 | Phillip Burrell | 45 | head | Rail Layer | Indiana |
| 34 | Eugene Burrell | 36 | wife | Maid | Illinois |
| 35 | Here Ends Block Number One And Begins Block Number Two | None | — | — | — |
| 36 | Henry Brown | 42 | head | — | Carolina |
| 37 | Martha Brown | 26 | wife | — | Missouri |
| 38 | John Brown | 12 | son | — | Illinois |
| 39 | Emma Brown | 9 | daughter | — | Illinois |
| 40 | Henry Brown | 7 | 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)