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Marion Brown — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Marion Brown across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 10-person household.
Age 18
b. ~1922
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Brown |
| Given Name | Marion |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Cashier |
| Industry | Dept Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 360 |
| Highest Grade | H-4 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Cashier |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1922 |
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 Marion | Age | Birth yr |
|---|---|---|---|---|
| Anne Brown | Daughter | — | 16 | ~1924 |
| Marjorie Brown | Daughter | — | 10 | ~1930 |
| Helen Brown | Daughter | — | 20 | ~1920 |
| Marion Brown | Daughter | — | 18 | ~1922 |
| Rita Brown | Daughter | — | 13 | ~1927 |
| Veronica Brown | Daughter | — | 15 | ~1925 |
| Harry Brown | Head | — | 44 | ~1896 |
| Bernice Talty | Other | — | 30 | ~1910 |
| Thomas Brown | Son | — | 12 | ~1928 |
| Margaret Brown | Spouse | — | 43 | ~1897 |
Census Appearances
1930
Cook, Illinois
Daughter, age 8
Cook, Illinois · implied b. ~1922 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Marion |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Montana |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 18
Cook-County, Illinois · implied b. ~1922 — 10 household members
| Surname | Brown |
| Given Name | Marion |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Cashier |
| Industry | Dept Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 360 |
| Highest Grade | H-4 |
| 1935 Residence | Same house |
| 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 Marion Brown across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Marion Brown
Daughter · 1940 · age 18 · b. ~1922 · Illinois
★ You are viewing this record
Sibling
Helen Brown
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Veronica Brown
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marjorie Brown
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Brown
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rita Brown
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anne Brown
Sibling · 1940 · age 16
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-t0627-00948-00282)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Caryl Rader | 5 | daughter | — | Illinois |
| 2 | Dillye Rader | 1 | daughter | — | Illinois |
| 3 | Harry Brown | 44 | Head | Conductor | Ireland |
| 4 | Margaret Brown | 43 | Wife | — | Ireland |
| 5 | Helen Brown | 20 | daughter | Secretary | Illinois |
| 6 | Marion Brown THIS PERSON | 18 | daughter | Cashier | Illinois |
| 7 | Anne Brown | 16 | daughter | — | Illinois |
| 8 | Veronica Brown | 15 | daughter | — | Illinois |
| 9 | Rita Brown | 13 | daughter | — | Illinois |
| 10 | Thomas Brown | 12 | Son | — | Illinois |
| 11 | Marjorie Brown | 10 | daughter | — | Illinois |
| 12 | Bernice Talty | 30 | Lodger | Cashier | Ireland |
| 13 | Frank Adams | 56 | Head | Sales Manager | Illinois |
| 14 | Johanna Adams | 57 | Wife | — | Illinois |
| 15 | Frank Jr. Adams | 30 | Son | Usher | Illinois |
| 16 | Herbert Adams | 27 | Son | Meter Reader | Illinois |
| 17 | George R. Adams | 21 | Son | Guard | Illinois |
| 18 | Alva S. Davies | 56 | Head | Laborer | Illinois |
| 19 | Gertrude Davies | 53 | Wife | — | Kentucky |
| 20 | Gerald Davies | 16 | Son | — | Illinois |
| 21 | Marion Davies | 15 | daughter | — | Illinois |
| 22 | Bernard Keiran | 46 | Head | Elevator Constructor | Illinois |
| 23 | Anna Keiran | 45 | Wife | — | Illinois |
| 24 | Marcella Keiran | 20 | daughter | Machine Operator | Illinois |
| 25 | Bernard Jr. Keiran | 17 | Son | — | Illinois |
| 26 | Lorrayne Keiran | 14 | daughter | — | Illinois |
| 27 | Howard Campbell | 25 | Head | Butcher | Iowa |
| 28 | Genevieve Campbell | 26 | Wife | — | Illinois |
| 29 | Howard Campbell | 0 | Son | — | Illinois |
| 30 | Charles Bell | 21 | Brother-in-law | Checker | Illinois |
| 31 | Thomas Mulhall | 43 | Head | Bartender | Illinois |
| 32 | Augusta Mulhall | 47 | Wife | — | Illinois |
| 33 | Lorraine Mulhall | 20 | daughter | Machine Operator | Illinois |
| 34 | Marcella Mulhall | 14 | daughter | — | Illinois |
| 35 | Thomas Mulhall | 9 | Son | — | Illinois |
| 36 | Wm. Moser | 42 | Head | Switchman | Illinois |
| 37 | Mabel Moser | 41 | Wife | — | Illinois |
| 38 | Vernon Moser | 20 | Son | Dental Mech. | Illinois |
| 39 | Donald Moser | 18 | Son | Rubber Vulcanizing | Illinois |
| 40 | William Moser | 8 | Son | — | Illinois |
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)