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Martha Bell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Martha Bell across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents John & Florence — first a daughter (b.~1911), then head of a 6-person household.
Age 29
b. ~1911
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Bell |
| Given Name | Martha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | O'Hara Twp |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Appointment Clerk |
| Industry | Public Utilities |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1000 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Appointment Clerk |
| Township / Ward | Ohara Twp |
| Est. Birth Year | ~1911 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Martha | Age | Birth yr |
|---|---|---|---|---|
| Florence Bell | Spouse | — | 51 | ~1889 |
| Betty Bell | Daughter | — | 25 | ~1915 |
| Martha Bell | Daughter | — | 29 | ~1911 |
| Joseph Bell | Son | — | 31 | ~1909 |
| John Bell | Head | — | 58 | ~1882 |
| Jack Bell | Son | — | 22 | ~1918 |
Census Appearances
1920
Allegheny, Pennsylvania
Daughter, age 9
Allegheny, Pennsylvania · implied b. ~1911 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bell |
| Given Name | Martha A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Ireland |
| Mother's Birthplace | England |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Daughter, age 19
Allegheny, Pennsylvania · implied b. ~1911 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bell |
| Given Name | Martha A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Ireland |
| Mother's Birthplace | England |
| Occupation | Clerk Office |
| Industry | Mayford Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 29
Allegheny-County, Pennsylvania · implied b. ~1911 — 6 household members
| Surname | Bell |
| Given Name | Martha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | O'Hara Twp |
| 1935 Residence (County) | Allegheny |
| Occupation | Appointment Clerk |
| Industry | Public Utilities |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1000 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Martha Bell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Bell (~0.92 confidence) and mother Florence Bell (~0.92 confidence) and mother Florence Bell (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Bell
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Florence Bell
b. ~1889
Source mother
● Household
· direct · ~0.92
Mother
Florence Bell
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Martha Bell
Daughter · 1940 · age 29 · b. ~1911 · Pennsylvania
★ You are viewing this record
Sibling
Joseph Bell
Sibling · 1940 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Bell
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jack Bell
Sibling · 1940 · age 22
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 — 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-t0627-03414-00019)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles Friedman | 7 | Son | — | Pennsylvania |
| 2 | Harry Angner | 57 | Lodger | Laborer | Pennsylvania |
| 3 | Charles Fodge | 38 | Head | Police Officer | Pennsylvania |
| 4 | Vera Fodge | 38 | Wife | — | Pennsylvania |
| 5 | Charles Fodge | 9 | Son | — | Pennsylvania |
| 6 | Harry Fodge | 7 | Son | — | Pennsylvania |
| 7 | Edna Evans | 31 | Sister-in-law | School Teacher | Pennsylvania |
| 8 | Caroline Evans | 24 | Sister-in-law | — | Pennsylvania |
| 9 | Phillip Jr. Mutschler | 72 | Head | Chain Shop Foreman | Germany |
| 10 | Emma Mutschler | 68 | Wife | — | Indiana |
| 11 | Alta Mutschler | 46 | Daughter | — | Indiana |
| 12 | Stephen Mccue | 63 | Head | Blacksmith | Pennsylvania |
| 13 | Margaret Mccue | 58 | Wife | — | Pennsylvania |
| 14 | Kenneth Thomas | 28 | Lodger | Laborer | Pennsylvania |
| 15 | John Fenton | 59 | Head | Prison Guard | Eire |
| 16 | Margaret Fenton | 50 | Wife | — | Pennsylvania |
| 17 | Francis Fenton | 21 | Son | Laborer | Pennsylvania |
| 18 | Lawrence Fenton | 19 | Son | New Worker | Pennsylvania |
| 19 | Richard Fenton | 17 | Son | — | Pennsylvania |
| 20 | Mildred Fenton | 13 | Daughter | — | Pennsylvania |
| 21 | Herman Brose | 47 | Head | Mail Carrier | Pennsylvania |
| 22 | Hannah Brose | 42 | Wife | — | England |
| 23 | Richard Brose | 8 | Son | — | Pennsylvania |
| 24 | John Bell | 58 | Head | Prison Guard | Ireland |
| 25 | Florence Bell | 51 | Wife | — | England |
| 26 | Joseph Bell | 31 | Son | Civil Engineer | Pennsylvania |
| 27 | Martha Bell THIS PERSON | 29 | Daughter | Appointment Clerk | Pennsylvania |
| 28 | Betty Bell | 25 | Daughter | Dental Assistant | Pennsylvania |
| 29 | Jack Bell | 22 | Son | Wire Installation | Pennsylvania |
| 30 | Grace Benjamin | 28 | Head | Barber'S Apprentice | Pennsylvania |
| 31 | Evelyn Benjamin | 50 | Mother | — | Pennsylvania |
| 32 | Laura Geffner | 52 | Aunt | — | Pennsylvania |
| 33 | Raymond Cook | 55 | Head | Master Mechanic | Pennsylvania |
| 34 | Nellie Cook | 42 | Wife | — | Pennsylvania |
| 35 | Rita Cook | 20 | Daughter | — | Pennsylvania |
| 36 | Thomas Cook | 19 | Son | Laying-Out Helper | Pennsylvania |
| 37 | Raymond Cook | 17 | Son | — | Pennsylvania |
| 38 | Lawrence Cook | 13 | Son | — | Pennsylvania |
| 39 | Joan Martin | 14 | Daughter | — | Pennsylvania |
| 40 | John Gondrich | 43 | Head | Laborer | Hungary |
Related Census Records
Pedigree Summary
Martha + 3 siblings
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)