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Mary Bell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Frederick-County, Maryland
Our Model Tree links this Mary Bell across the 1920, 1930 and 1940 US Censuses in Frederick-County, Maryland (XGBoost, ~Confirmed) — first a head (b.~1870), then head of a 5-person household.
Age 70
b. ~1870
Female
Head
Born: Maryland
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Frederick-County, Maryland |
| Surname | Bell |
| Given Name | Mary B. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District #14 Jefferson |
| 1935 Residence (County) | Frederick |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Election District 14 Jefferson |
| Est. Birth Year | ~1870 |
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 |
|---|---|---|---|---|
| Mary Bell | Head | — | 70 | ~1870 |
| Marilyn Bell | Other | — | 1 | ~1939 |
| Macklin Bell | Other | — | 35 | ~1905 |
| George Bell | Son | — | 37 | ~1903 |
| William Bell | Son | — | 39 | ~1901 |
Census Appearances
1920
Frederick, Maryland
Head, age 50
Frederick, Maryland · implied b. ~1870 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bell |
| Given Name | Mary B. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Maryland |
| Occupation | Farmer |
| Industry | Small farm |
| Class of Worker | Em |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Frederick, Maryland
Head, age 61
Frederick, Maryland · implied b. ~1869 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bell |
| Given Name | Mary B. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 61 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| Age at First Marriage | 21 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Frederick-County, Maryland
Head, age 70
Frederick-County, Maryland · implied b. ~1870 — 5 household members
| Surname | Bell |
| Given Name | Mary B. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District #14 Jefferson |
| 1935 Residence (County) | Frederick |
| Class of Worker | 0 |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 70 · b. ~1870 · Maryland
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Frederick-County, Maryland
Open full size
1940 US Federal Census — Frederick-County, Maryland
Page Contents
21 people indexed on this census page (nara:1940:m-t0627-01549-00304)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Vivian Smith | 43 | Wife | — | Maryland |
| 42 | Millard Jr Smith | 20 | Son | — | Maryland |
| 43 | Amanda Smith | 17 | Daughter | — | Maryland |
| 44 | Katherine Smith | 15 | Daughter | — | Maryland |
| 45 | Helen Smith | 13 | Daughter | — | Maryland |
| 46 | Gladis Smith | 10 | Daughter | — | Maryland |
| 47 | Doris Smith | 8 | Daughter | — | Maryland |
| 48 | Franklin Smith | 5 | Son | — | Maryland |
| 49 | Chester Brown | 38 | Head | Farming | Maryland |
| 50 | Evelyn W. Brown | 32 | Wife | — | Maryland |
| 51 | Willard Brown | 15 | Son | — | Maryland |
| 52 | Constance Brown | 10 | Daughter | — | Maryland |
| 53 | Mary B. Bell THIS PERSON | 70 | Head | — | Maryland |
| 54 | William H. Bell | 39 | Son | Miller | Maryland |
| 55 | Macklin Bell | 35 | Daughter-in-law | — | Maryland |
| 56 | Marilyn Bell | 1 | Granddaughter | — | Maryland |
| 57 | George Bell | 37 | Son | Miller | Maryland |
| 58 | David W. Kifer | 27 | Head | Farming | West Virginia |
| 59 | Pauline Kifer | 25 | Wife | — | Maryland |
| 60 | Marilynn Kifer | 0 | Daughter | — | Maryland |
| 61 | Everett Davis | 19 | Hired Hand | Farm Hand | Virginia |
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)