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Mary Arnold — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Arnold across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1912), then head of a 6-person household.
Age 28
b. ~1912
Female
Spouse
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Arnold |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | McCandless |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Mccandless |
| Est. Birth Year | ~1912 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Helen Arnold | Daughter | — | 8 | ~1932 |
| Theodore Arnold | Head | — | 35 | ~1905 |
| Robert Arnold | Son | — | 10 | ~1930 |
| Thomas Arnold | Son | — | 5 | ~1935 |
| Theodore Arnold | Son | — | 6 | ~1934 |
| Mary Arnold | Spouse | — | 28 | ~1912 |
Census Appearances
1920
Allegheny, Pennsylvania
Other, age 8
Allegheny, Pennsylvania · implied b. ~1912 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Arnold |
| Given Name | Mary |
| Relationship to Head | Grand daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Other, age 18
Allegheny, Pennsylvania · implied b. ~1912 — 16 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Arnold |
| Given Name | Mary |
| Relationship to Head | Niece |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Clerk |
| Industry | Coal & Coke |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Spouse, age 28
Allegheny-County, Pennsylvania · implied b. ~1912 — 6 household members
| Surname | Arnold |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | McCandless |
| 1935 Residence (County) | Allegheny |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| 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 Mary Arnold across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Arnold
Spouse · 1940 · age 28 · b. ~1912 · Pennsylvania
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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 — 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-t0627-03407-00314)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles P. Pike | 27 | Head | Merchant | Pennsylvania |
| 2 | Sophia O. Pike | 24 | Wife | — | Pennsylvania |
| 3 | David White | 34 | Head | Foreman | Pennsylvania |
| 4 | Jennie O. White | 23 | Wife | — | Pennsylvania |
| 5 | Keith White | 2 | Son | — | Pennsylvania |
| 6 | Mary O. Donald | 66 | Head | Inn Keeper | Scotland |
| 7 | Henry Donald | 33 | Son | Inn Keeper | Pennsylvania |
| 8 | Laura Adams | 46 | Housekeeper | Housework | Pennsylvania |
| 9 | Theodore Arnold | 35 | Head | Manager | Pennsylvania |
| 10 | Mary Arnold THIS PERSON | 28 | Wife | — | Pennsylvania |
| 11 | Robert J. Arnold | 10 | Son | — | Pennsylvania |
| 12 | Helen Arnold | 8 | Daughter | — | Pennsylvania |
| 13 | Theodore Jr. Arnold | 6 | Son | — | Pennsylvania |
| 14 | Thomas J. Arnold | 5 | Son | — | Pennsylvania |
| 15 | Milton H. Gangler | 41 | Head | Fireman | Pennsylvania |
| 16 | Mabel Gangler | 36 | Wife | — | Pennsylvania |
| 17 | Gilbert Gangler | 14 | Son | — | Pennsylvania |
| 18 | Marcella Gangler | 4 | Daughter | — | Pennsylvania |
| 19 | George E. Conrad | 43 | Head | Farmer | Pennsylvania |
| 20 | William H. Conrad | 73 | Father | Farm Laborer | Pennsylvania |
| 21 | James L. Harlan | 55 | Head | Banker | Ohio |
| 22 | Mae E. Harlan | 53 | Wife | — | Pennsylvania |
| 23 | Grace Harlan | 26 | Daughter | Cashier | Pennsylvania |
| 24 | David S. Harlan | 16 | Son | — | Pennsylvania |
| 25 | Jacqueline Harlan | 4 | Daughter | — | Pennsylvania |
| 26 | Carl Ramsey | 26 | Head | Contractor | Indiana |
| 27 | Mary Ramsey | 24 | Wife | — | Missouri |
| 28 | Orville Williams | 50 | Head | Contractor | Oklahoma |
| 29 | Mary Williams | 38 | Wife | — | Ohio |
| 30 | Carl Huck | 36 | Head | Repairman | Pennsylvania |
| 31 | Laura O. Huck | 33 | Wife | — | Pennsylvania |
| 32 | Carl J. Huck | 12 | Son | — | Pennsylvania |
| 33 | Barbara Huck | 10 | Daughter | — | Pennsylvania |
| 34 | Nancy Huck | 3 | Daughter | — | Pennsylvania |
| 35 | Margaret Hemphill | 64 | Head | — | Pennsylvania |
| 36 | Clair Hemphill | 33 | Son | Laborer | Pennsylvania |
| 37 | Henry Huck | 22 | Head | Farm Laborer | Pennsylvania |
| 38 | Anna Huck | 23 | Wife | — | Pennsylvania |
| 39 | Henry Jr. Huck | 2 | Son | — | Pennsylvania |
| 40 | Rodger Huck | 2 | Son | — | Pennsylvania |
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)