MH
Mary Hoffman — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Hoffman across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Frank & Rose — first a spouse (b.~1915), then head of a 3-person household.
Age 25
b. ~1915
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Hoffman |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Hours Worked | 0 |
| Highest Grade | No H-2 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1915 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Arlene Hoffman | Daughter | — | 3 | ~1937 |
| Arthur Hoffman | Head | — | 26 | ~1914 |
| Mary Hoffman | Spouse | — | 25 | ~1915 |
Census Appearances
1920
Cook, Illinois
Daughter, age 4
Cook, Illinois · implied b. ~1916 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hoffman |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Occupation | none |
| Mother Tongue | Polish |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 15
Cook, Illinois · implied b. ~1915 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hoffman |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| Age at First Marriage | No |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Spouse, age 25
Cook-County, Illinois · implied b. ~1915 — 3 household members
| Surname | Hoffman |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Hours Worked | 0 |
| Highest Grade | No H-2 |
| 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 Mary Hoffman across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Frank Hoffman (~0.92 confidence) and mother Rose Hoffman (~0.92 confidence) and mother Rose Hoffman (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Hoffman
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Rose Hoffman
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Rose Hoffman
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Hoffman
Spouse · 1940 · age 25 · b. ~1915 · 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
40 people indexed on this census page (nara:1940:m-t0627-00981-00294)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Stella Book | 38 | Wife | — | Austria |
| 42 | Arthur Book | 8 | Son | — | Illinois |
| 43 | John Book | 3 | Son | — | Illinois |
| 44 | Michael Book | 1 | Son | — | Illinois |
| 45 | Arthur Hoffman | 26 | Head | Crane Operator | Illinois |
| 46 | Mary Hoffman THIS PERSON | 25 | Wife | — | Illinois |
| 47 | Arlene Hoffman | 3 | Daughter | — | Illinois |
| 48 | Michael Kelly | 60 | Head | Field Foreman | Ireland |
| 49 | Mary R. Kelly | 60 | Wife | — | Ireland |
| 50 | William Callaghan | 46 | Head | Labor Foreman | Ireland |
| 51 | Sarah Callaghan | 42 | Wife | — | Ireland |
| 52 | William Jr. Callaghan | 14 | Son | — | Illinois |
| 53 | Ruth Callaghan | 12 | Daughter | — | Illinois |
| 54 | Ernest Callaghan | 10 | Son | — | Illinois |
| 55 | Edward Antkowiak | 31 | Head | Truck Driver | Illinois |
| 56 | Emily Antkowiak | 28 | Wife | — | Illinois |
| 57 | Donald Antkowiak | 3 | Son | — | Illinois |
| 58 | Robert Johnson | 49 | Head | Carpenter | Illinois |
| 59 | Louise Johnson | 47 | Wife | — | Illinois |
| 60 | Ethel Newman | 21 | Daughter | Bill Clerk | Illinois |
| 61 | Frank Harter | 52 | Head | Pressman | Illinois |
| 62 | Gladys Harter | 50 | Wife | — | Illinois |
| 63 | Katherine Ranut | 59 | Head | Coach Cleaner | Poland |
| 64 | Nellie Batiuk | 42 | Boarder | Coil Winder | Poland |
| 65 | Mary Stellmach | 44 | Boarder | Slip Stitcher | Poland |
| 66 | Martin Sipka | 68 | Head | — | Slovakia |
| 67 | Mary Sipka | 64 | Wife | — | Slovakia |
| 68 | Julius Nemeth | 46 | Head | Toolmaker | Austria |
| 69 | Elizabeth Nemeth | 38 | Wife | — | Hungary |
| 70 | Julius Jr. Nemeth | 19 | Son | Production Clerk | Illinois |
| 71 | Harold Janious | 38 | Head | Sheet Metal Worker | England |
| 72 | Anabella Janious | 34 | Wife | — | Scotland |
| 73 | William E. Foley | 34 | Head | Coal Clerk | Illinois |
| 74 | Gertrude Foley | 32 | Wife | Saleslady-Lite | Illinois |
| 75 | Robert Foley | 13 | Son | — | Illinois |
| 76 | Donald Foley | 11 | Son | — | Illinois |
| 77 | John Calderwood | 58 | Head | Boiler Maker | Ireland |
| 78 | Elmilly Calderwood | 50 | Wife | Saleslady | Illinois |
| 79 | John Jr. Calderwood | 22 | Son | Apprentice | Illinois |
| 80 | John Wilson | 66 | Head | Walker | Illinois |
Pedigree Summary
Mary
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)