MD
Marion Davis — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Marion Davis across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 10-person household.
Age 10
b. ~1930
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Davis |
| Given Name | Marion |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | No 3 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| 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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Marion | Age | Birth yr |
|---|---|---|---|---|
| Evelyn Davis | Daughter | — | 11 | ~1929 |
| Eileen Davis | Daughter | — | 4 | ~1936 |
| Maretha Davis | Daughter | — | 12 | ~1928 |
| Marion Davis | Daughter | — | 10 | ~1930 |
| Roselyn Davis | Daughter | — | 8 | ~1932 |
| John Davis | Head | — | 41 | ~1899 |
| Donald Davis | Son | — | 6 | ~1934 |
| Norman Davis | Son | — | 14 | ~1926 |
| Lawrence Davis | Son | — | 2 | ~1938 |
| Ida Davis | Spouse | — | 32 | ~1908 |
Census Appearances
1930
Cook, Illinois
Daughter, age
Cook, Illinois · implied b. ~1930 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Marion |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 10
Cook-County, Illinois · implied b. ~1930 — 10 household members
| Surname | Davis |
| Given Name | Marion |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Highest Grade | No 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 Marion Davis across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Marion Davis
Daughter · 1940 · age 10 · b. ~1930 · Illinois
★ You are viewing this record
Sibling
Norman Davis
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Davis
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Maretha Davis
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Davis
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eileen Davis
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Roselyn Davis
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Evelyn Davis
Sibling · 1940 · age 11
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
39 people indexed on this census page (nara:1940:m-t0627-00926-00876)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Monroe Valton | 57 | Head | — | Oklahoma |
| 2 | Frank Merenda | 46 | Head | Laborer | Italy |
| 3 | Catherine Merenda | 32 | Wife | Tag Wirer | Italy |
| 4 | Catherine Merenda | 11 | Daughter | — | Illinois |
| 5 | Arzella Hughes | 52 | Head | — | Kansas |
| 6 | Rudolph Blake | 7 | Nephew | — | Illinois |
| 7 | Edward Pragalls | 62 | Lodger | — | Ohio |
| 8 | Phelix Henderson | 49 | Lodger | — | Indiana |
| 9 | Sellias Kennedy | 34 | Head | Laborer | Tennessee |
| 10 | Mary Kennedy | 28 | Wife | — | Tennessee |
| 11 | John H. Kennedy | 11 | Son | — | Tennessee |
| 12 | Albert Kennedy | 9 | Son | — | Illinois |
| 13 | Margrette Kennedy | 8 | Daughter | — | Illinois |
| 14 | Charles Kennedy | 6 | Son | — | Illinois |
| 15 | Leon Kennedy | 4 | Son | — | Illinois |
| 16 | Dallas Kennedy | 1 | Son | — | Illinois |
| 17 | John Davis | 41 | Head | Laborer | Tennessee |
| 18 | Ida Davis | 32 | Wife | — | Illinois |
| 19 | Norman Davis | 14 | Son | — | Illinois |
| 20 | Maretha Davis | 12 | Daughter | — | Illinois |
| 21 | Evelyn Davis | 11 | Daughter | — | Illinois |
| 22 | Marion Davis THIS PERSON | 10 | Daughter | — | Illinois |
| 23 | Roselyn Davis | 8 | Daughter | — | Illinois |
| 24 | Donald Davis | 6 | Son | — | Illinois |
| 25 | Eileen Davis | 4 | Daughter | — | Illinois |
| 26 | Lawrence Davis | 2 | Son | — | Illinois |
| 27 | Alice Salvato | 57 | Head | — | Italy |
| 28 | Frank Salvato | 31 | Son | Bartender | Illinois |
| 29 | Rocco Salvato | 25 | Son | Lamp Maker | Illinois |
| 30 | Nettie Salvato | 18 | Daughter | Wreath Maker | Illinois |
| 31 | Nancy Harper | 57 | Head | Seamstress | Kansas |
| 32 | Mamie Bedra | 67 | Sister | — | Kentucky |
| 33 | Lucille Lewis | 11 | Neice | — | Illinois |
| 34 | Eliza Harris | 82 | Head | — | Mississippi |
| 35 | Craig Chambers | 54 | Head | Coal Deliverer | Mississippi |
| 36 | Idella Chambers | 50 | Wife | — | Mississippi |
| 37 | Howard Reed | 37 | Lodger | — | Ohio |
| 38 | Mahala Rogers | 50 | Lodger | — | Mississippi |
| 39 | Hurie Lee | 27 | Lodger | Presser Machine Operator | Mississippi |
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)