MT
Mary Thomas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lawrence-County, Pennsylvania
Our Model Tree links this Mary Thomas across the 1910, 1920, 1930 and 1940 US Censuses in Lawrence-County, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1872), then head of a 4-person household.
Age 68
b. ~1872
Female
Spouse
Born: Wales
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Lawrence-County, Pennsylvania |
| Surname | Thomas |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 68 |
| Marital Status | Married |
| Birthplace | Wales |
| 1935 Residence (City) | New Castle City |
| 1935 Residence (County) | Lawrence |
| Naturalization Status | Naturalized |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Wales |
| Birthplace (normalized) | wales |
| Township / Ward | New Castle City |
| Est. Birth Year | ~1872 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Ethel Miller | Daughter | — | 37 | ~1903 |
| Thomas Thomas | Head | — | 66 | ~1874 |
| Milton Miller | Other | — | 40 | ~1900 |
| Mary Thomas | Spouse | — | 68 | ~1872 |
Census Appearances
1910
Lawrence, Pennsylvania
Spouse, age 37
Lawrence, Pennsylvania · implied b. ~1873 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Margaret |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Wales |
| Years Married | 14 |
| Children Born | 0 |
| Children Living | 0 |
| Father's Birthplace | Wales |
| Mother's Birthplace | Wales |
| Occupation | none |
| Birth Country | Wales |
| Birthplace (normalized) | wales |
1920
Lawrence, Pennsylvania
Spouse, age 46
Lawrence, Pennsylvania · implied b. ~1874 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Mary H |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Wales |
| Year of Immigration | 1892 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Wales |
| Mother's Birthplace | Wales |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Wales |
| Birthplace (normalized) | wales |
1930
Lawrence, Pennsylvania
Spouse, age 58
Lawrence, Pennsylvania · implied b. ~1872 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Mary A. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Wales |
| Naturalization Status | Naturalized |
| Year of Immigration | 1887 |
| Age at First Marriage | 20 |
| Father's Birthplace | Wales |
| Mother's Birthplace | Wales |
| Can Read/Write | Yes |
| Mother Tongue | Welsh |
| Birth Country | Wales |
| Birthplace (normalized) | wales |
1940
Lawrence-County, Pennsylvania
Spouse, age 68
Lawrence-County, Pennsylvania · implied b. ~1872 — 4 household members
| Surname | Thomas |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 68 |
| Marital Status | Married |
| Birthplace | Wales |
| 1935 Residence (City) | New Castle City |
| 1935 Residence (County) | Lawrence |
| Naturalization Status | Naturalized |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Wales |
| Birthplace (normalized) | wales |
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 Thomas across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Thomas
Spouse · 1940 · age 68 · b. ~1872 · 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 — Lawrence-County, Pennsylvania
Open full size
1940 US Federal Census — Lawrence-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03538-00290)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Frank A. Giamarine | 46 | Head | Proprietor | Italy |
| 42 | Assunta Giamarine | 36 | Wife | — | Italy |
| 43 | Yolanda Giamarine | 20 | Daughter | Clerk | Pennsylvania |
| 44 | Mary Giamarine | 19 | Daughter | New Worker | Pennsylvania |
| 45 | Anna Giamarine | 16 | Daughter | — | Pennsylvania |
| 46 | Thomas J. Thomas | 66 | Head | — | Wales |
| 47 | Mary Thomas THIS PERSON | 68 | Wife | — | Wales |
| 48 | Milton Miller | 40 | Son-in-law | Repairman | Pennsylvania |
| 49 | Ethel Miller | 37 | Daughter | — | Ohio |
| 50 | Adam Viscosky | 56 | Head | Laborer | Poland |
| 51 | Mary Viscosky | 45 | Wife | Sewer | Poland |
| 52 | Mary Viscosky | 25 | Daughter | Shipping Clerk | Pennsylvania |
| 53 | Joseph Viscosky | 24 | Son | Attendant | Pennsylvania |
| 54 | Walter Viscosky | 23 | Son | Laborer | Pennsylvania |
| 55 | Anna Viscosky | 21 | Daughter | — | Pennsylvania |
| 56 | Angeline Maiella | 62 | Head | — | Italy |
| 57 | Philomena Maiella | 30 | Daughter | Housework Project | Pennsylvania |
| 58 | Mike Maiella | 19 | Son | Laborer | Pennsylvania |
| 59 | Cecil Maiella | 16 | Son | New Worker | Pennsylvania |
| 60 | Domenick Coppel | 62 | Head | Laborer | Italy |
| 61 | Theresa Coppel | 58 | Wife | — | Italy |
| 62 | James Coppel | 33 | Son | Bartender | Italy |
| 63 | Josephine Coppel | 32 | Daughter-in-law | — | Italy |
| 64 | Theresa Coppel | 14 | Granddaughter | — | Pennsylvania |
| 65 | James Coppel | 12 | Grandson | — | Pennsylvania |
| 66 | Frank Coppel | 21 | Son | New Worker | Pennsylvania |
| 67 | Anna Coppel | 22 | Daughter-in-law | — | Pennsylvania |
| 68 | Samuel Coppel | 0 | Grandson | — | Pennsylvania |
| 69 | Mary Coppel | 18 | Daughter | New Worker | Pennsylvania |
| 70 | Charles O'Brien | 57 | Head | Laborer | Ireland |
| 71 | Frances O'Brien | 52 | Wife | — | Pennsylvania |
| 72 | Florence O'Brien | 26 | Daughter | Clerk | Pennsylvania |
| 73 | Leo O'Brien | 22 | Son | Clerk | Pennsylvania |
| 74 | Jack O'Brien | 16 | Son | Paper Boy | Pennsylvania |
| 75 | Shirley O'Brien | 11 | Daughter | — | Pennsylvania |
| 76 | Flora Gilmore | 20 | Niece | Laborer | Pennsylvania |
| 77 | Louis Gaspari | 45 | Head | Music Instructor | Italy |
| 78 | Lena Gaspari | 40 | Wife | — | Pennsylvania |
| 79 | Theodore Turco | 30 | Head | Recreation Leader | Pennsylvania |
| 80 | Philomena Turco | 23 | Wife | — | 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)