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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 Laurence & Mary — first a daughter (b.~1919), then head of a 4-person household.
Age 21
b. ~1919
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Bell |
| Given Name | Martha Jane |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Wilkinsburg borough |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Wilkinsburg Borough |
| Est. Birth Year | ~1919 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Martha | Age | Birth yr |
|---|---|---|---|---|
| Martha Bell | Daughter | — | 21 | ~1919 |
| Mary Bell | Daughter | — | 20 | ~1920 |
| Mary Bell | Spouse | — | 46 | ~1894 |
| Laurence Bell | Head | — | 47 | ~1893 |
Census Appearances
1920
Allegheny, Pennsylvania
Daughter, age 1
Allegheny, Pennsylvania · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bell |
| Given Name | Martha J. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Daughter, age 11
Allegheny, Pennsylvania · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bell |
| Given Name | Martha J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 21
Allegheny-County, Pennsylvania · implied b. ~1919 — 4 household members
| Surname | Bell |
| Given Name | Martha Jane |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Wilkinsburg borough |
| 1935 Residence (County) | Allegheny |
| Highest Grade | C 3 |
| 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 Laurence Bell (~0.92 confidence) and mother Mary Bell (~0.92 confidence) and mother Mary Bell (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Laurence Bell
b. ~1893
Source father
● Household
· direct · ~0.92
Mother
Mary Bell
b. ~1894
Source mother
● Household
· direct · ~0.92
Mother
Mary Bell
b. ~1894
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Martha Bell
Daughter · 1940 · age 21 · b. ~1919 · Pennsylvania
★ You are viewing this record
Sibling
Mary Bell
Sibling · 1940 · age 20
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-t0627-03421-00578)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ralph W. Kindig | 43 | Head | School Teacher | Pennsylvania |
| 42 | Lois Kindig | 28 | Wife | — | Pennsylvania |
| 43 | Ralph Kindig | 4 | Son | — | Pennsylvania |
| 44 | William Omlaer | 44 | Brother-in-law | Inspector | Pennsylvania |
| 45 | James Omlaer | 33 | Head | Mechanic | Pennsylvania |
| 46 | Henrietta Omlaer | 30 | Wife | — | Pennsylvania |
| 47 | James Jr. Omlaer | 6 | Son | — | Pennsylvania |
| 48 | Henry Kaufmann | 19 | Brother-in-law | Mail Clerk | Pennsylvania |
| 49 | William Mckechnie | 52 | Head | Manager | Pennsylvania |
| 50 | Beryl Mckechnie | 51 | Wife | — | Ohio |
| 51 | James A. Mckechnie | 16 | Son | — | Pennsylvania |
| 52 | Beatrice Mckechnie | 22 | Daughter | — | Pennsylvania |
| 53 | Carol Mckechnie | 8 | Daughter | — | Pennsylvania |
| 54 | Laurence Bell | 47 | Head | Vice President | Pennsylvania |
| 55 | Mary A. Bell | 46 | Wife | — | Pennsylvania |
| 56 | Mary Margaret Bell | 20 | Daughter | — | Pennsylvania |
| 57 | Martha Jane Bell THIS PERSON | 21 | Daughter | — | Pennsylvania |
| 58 | Ellwood Piper | 56 | Head | Medical Physician | Pennsylvania |
| 59 | Urilla M. Piper | 58 | Wife | — | Pennsylvania |
| 60 | Wendell Piper | 28 | Son | — | Pennsylvania |
| 61 | Wilda M. Piper | 23 | Daughter | — | Pennsylvania |
| 62 | John S. Oartel | 39 | Head | Teacher - Dentist | Pennsylvania |
| 63 | Mabel S. Oartel | 39 | Wife | — | Pennsylvania |
| 64 | Ruth Ann Oartel | 10 | Daughter | — | Pennsylvania |
| 65 | Margaret Jean Oartel | 8 | Daughter | — | Pennsylvania |
| 66 | John S. Jr. Oartel | 3 | Son | — | Pennsylvania |
| 67 | Charles E. Hadlee | 42 | Head | Clerical Supervisor | Pennsylvania |
| 68 | Rachel O. Hadlee | 39 | Wife | — | Pennsylvania |
| 69 | Charles M. Hadlee | 19 | Son | — | Pennsylvania |
| 70 | Thomas W. Mcfadden | 70 | Head | Dentist | Pennsylvania |
| 71 | Kathryn Mcfadden | 65 | Wife | — | Virginia |
| 72 | W. H. Jones | 55 | Help | Gardener | N. Carolina |
| 73 | George F. Felger | 68 | Head | Tailor | Ohio |
| 74 | Blanche S. Felger | 55 | Wife | — | Pennsylvania |
| 75 | Rosa Burt | 36 | Maid | Maid | Alabama |
| 76 | Floyd H. Carson | 42 | Head | Principal | Illinois |
| 77 | Lucille Carson | 39 | Wife | — | Iowa |
| 78 | Effa M. Douglass | 66 | Mother-in-law | — | Iowa |
| 79 | Samuel C. Mcconahay | 64 | Head | Treasurer - Vice President | Ohio |
| 80 | Rachel M. Mcconahay | 63 | Wife | — | Kansas |
Pedigree Summary
Martha + 1 sibling
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)