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Mary Bell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Bell across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1885), then head of a 5-person household.
Age 55
b. ~1885
Female
Head
Born: France
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Bell |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Widowed |
| Birthplace | France |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Additional Details | |
| Hours Worked | 0 |
| Income (1939) | 50 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth Country | France |
| Birthplace (normalized) | france |
| Township / Ward | Pittsburgh City |
| Est. Birth Year | ~1885 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Helen Bell | Daughter | — | 21 | ~1919 |
| Eugenie Bell | Daughter | — | 20 | ~1920 |
| Margaret Bell | Daughter | — | 29 | ~1911 |
| Mary Bell | Head | — | 55 | ~1885 |
| Anthony Bell | Son | — | 14 | ~1926 |
Census Appearances
1920
Allegheny, Pennsylvania
Spouse, age 35
Allegheny, Pennsylvania · implied b. ~1885 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bell |
| Given Name | Mary D. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | France |
| Year of Immigration | 1887 |
| Naturalization Status | Naturalized |
| Father's Birthplace | France |
| Mother's Birthplace | France |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | French |
| Birth Country | France |
| Year of Naturalization | 1893 |
| Birthplace (normalized) | france |
1930
Allegheny, Pennsylvania
Spouse, age 45
Allegheny, Pennsylvania · implied b. ~1885 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bell |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | France |
| Naturalization Status | Naturalized |
| Year of Immigration | 1912 |
| Age at First Marriage | 25 |
| Father's Birthplace | France |
| Mother's Birthplace | France |
| Can Read/Write | Yes |
| Mother Tongue | French |
| Birth Country | France |
| Birthplace (normalized) | france |
1940
Allegheny-County, Pennsylvania
Head, age 55
Allegheny-County, Pennsylvania · implied b. ~1885 — 5 household members
| Surname | Bell |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Widowed |
| Birthplace | France |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Hours Worked | 0 |
| Income (1939) | 50 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth Country | France |
| Birthplace (normalized) | france |
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 Bell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Bell
Head · 1940 · age 55 · b. ~1885 · Pennsylvania
★ 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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03663-00434)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Bessie Heiler | 42 | Wife | — | Pennsylvania |
| 42 | Jack Heiler | 19 | Son | — | Pennsylvania |
| 43 | Burton Heiler | 17 | Son | — | Pennsylvania |
| 44 | Charlotte Heiler | 15 | Daughter | — | Pennsylvania |
| 45 | Sidney Heiler | 12 | Son | — | Pennsylvania |
| 46 | Herbert Heiler | 9 | Son | — | Pennsylvania |
| 47 | Helen Kabosky | 22 | Lodger | Maid | Pennsylvania |
| 48 | Charles Smith | 67 | Head | Contractor | Pennsylvania |
| 49 | Howard Mcgowan | 32 | Lodger | Clerk | Pennsylvania |
| 50 | Mary Bell THIS PERSON | 55 | Head | — | France |
| 51 | Margaret Bell | 29 | Daughter | Social Service Worker | Pennsylvania |
| 52 | Helen E. Bell | 21 | Daughter | Assistant Librarian | Pennsylvania |
| 53 | Eugenie Bell | 20 | Daughter | Secretary | Pennsylvania |
| 54 | Anthony W. Bell | 14 | Son | — | Pennsylvania |
| 55 | Lewis M. Strauss | 39 | Head | Aluminum Salesman | New York |
| 56 | Fritz Strauss | 35 | Wife | — | Russ Lithuania |
| 57 | Jacob W. Simon | 43 | Head | House Builder | Pennsylvania |
| 58 | Selva Simon | 42 | Wife | — | Pennsylvania |
| 59 | Jennie Teplitz | 69 | Mother-in-law | — | Russia |
| 60 | Odessa King | 19 | Maid | Maid | Pennsylvania |
| 61 | Dorsey W. Nealy | 59 | Head | Representative | Pennsylvania |
| 62 | Emma K. Nealy | 51 | Wife | — | Pennsylvania |
| 63 | Samuel B. Casey | 37 | Head | Furnace Salesman | Pennsylvania |
| 64 | Constance Casey | 34 | Wife | — | Pennsylvania |
| 65 | Joan Casey | 13 | Daughter | — | Pennsylvania |
| 66 | Samuel B. Jr. Casey | 12 | Son | — | Pennsylvania |
| 67 | Constance C. Casey | 7 | Daughter | — | Pennsylvania |
| 68 | Rose M. Casey | 5 | Daughter | — | Pennsylvania |
| 69 | Eliza Williams | 43 | Maid | Maid | Pennsylvania |
| 70 | Mary Arobitch | 28 | Maid | Maid | Pennsylvania |
| 71 | Louis Schwartz | 62 | Head | Merchandise Manager | New York |
| 72 | Hattie Schwartz | 59 | Wife | — | New York |
| 73 | Joseph J. Hush | 43 | Son-in-law | Medical Doctor | Pennsylvania |
| 74 | Ruth Hush | 33 | Daughter | — | New York |
| 75 | Louis Hush | 3 | Grandson | — | Pennsylvania |
| 76 | Albert Machesky | 38 | Head | Attorney | Pennsylvania |
| 77 | Mary Machesky | 37 | Wife | — | Pennsylvania |
| 78 | Agnes Dollar | 34 | Maid | Maid | Pennsylvania |
| 79 | William Montgomery | 58 | Head | President | Scotland |
| 80 | Marion Montgomery | 58 | Wife | — | Scotland |
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)