NC
Nellie Clark — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Nellie Clark across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1894), then head of a 5-person household.
Age 46
b. ~1894
Female
Spouse
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Clark |
| Given Name | Nellie |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Mt. Lebanon |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Mt Lebanon |
| Est. Birth Year | ~1894 |
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 Nellie | Age | Birth yr |
|---|---|---|---|---|
| Margaret Clark | Daughter | — | 18 | ~1922 |
| Roy Clark | Head | — | 48 | ~1892 |
| Thomas Clark | Son | — | 23 | ~1917 |
| Roy Clark | Son | — | 14 | ~1926 |
| Nellie Clark | Spouse | — | 46 | ~1894 |
Census Appearances
1920
Allegheny, Pennsylvania
Spouse, age 25
Allegheny, Pennsylvania · implied b. ~1895 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Nellie M |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Spouse, age 35
Allegheny, Pennsylvania · implied b. ~1895 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Nellie C. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 22 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Spouse, age 46
Allegheny-County, Pennsylvania · implied b. ~1894 — 5 household members
| Surname | Clark |
| Given Name | Nellie |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Mt. Lebanon |
| 1935 Residence (County) | Allegheny |
| Class of Worker | 0 |
| 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 Nellie Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Nellie Clark
Spouse · 1940 · age 46 · b. ~1894 · 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-t0627-03411-00360)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William R. Daves | 58 | Head | Engineer | Pennsylvania |
| 2 | Robert S. Daves | 27 | Son | Stenographer | Pennsylvania |
| 3 | Frances Daves | 24 | Daughter | Stenographer | Pennsylvania |
| 4 | Betty Daves | 21 | Daughter | Engineer | Pennsylvania |
| 5 | Roy A. Clark | 48 | Head | — | Pennsylvania |
| 6 | Nellie Clark THIS PERSON | 46 | Wife | — | Pennsylvania |
| 7 | Thomas R. Clark | 23 | Son | — | Pennsylvania |
| 8 | Margaret E. Clark | 18 | Daughter | — | Pennsylvania |
| 9 | Roy A. Jr. Clark | 14 | Son | — | Pennsylvania |
| 10 | Harold F. Bucher | 50 | Head | Engineer | Pennsylvania |
| 11 | Marion M. Bucher | 46 | Wife | — | New Jersey |
| 12 | Harold F. Jr. Bucher | 17 | Son | — | Pennsylvania |
| 13 | William M. Bucher | 15 | Son | — | Pennsylvania |
| 14 | Marion S. Bucher | 10 | Daughter | — | Pennsylvania |
| 15 | William H. Muir | 76 | Father-in-law | — | Pennsylvania |
| 16 | Robert O'Brien | 35 | Head | Asst. Supt. | Indiana |
| 17 | Vera A. O'Brien | 35 | Wife | — | Pennsylvania |
| 18 | Mary C. O'Brien | 10 | Daughter | — | Pennsylvania |
| 19 | Arthur D. O'Brien | 9 | Son | — | Maryland |
| 20 | Patricia O'Brien | 7 | Daughter | — | Maryland |
| 21 | Ann Lopko | 21 | Servant | Maid | Pennsylvania |
| 22 | Charles Adams | 54 | Head | Salesman | Illinois |
| 23 | Margaret Adams | 44 | Wife | — | Illinois |
| 24 | Charles Adams | 15 | Son | — | Pennsylvania |
| 25 | Thomas Barclay | 43 | Head | Metallurgist | Pennsylvania |
| 26 | Helen C. Barclay | 42 | Wife | — | Pennsylvania |
| 27 | James C. Barclay | 19 | Son | — | Pennsylvania |
| 28 | Linda C. Barclay | 2 | Daughter | — | Pennsylvania |
| 29 | Faye Rupert | 40 | Servant | Maid | Ohio |
| 30 | George A. Hahner | 57 | Head | Specializer | Pennsylvania |
| 31 | Barbara J. Hahner | 54 | Wife | — | Pennsylvania |
| 32 | George A. Hahner | 26 | Son | Manager | Pennsylvania |
| 33 | Dolores Hahner | 20 | Daughter | Stenographer | Pennsylvania |
| 34 | Barbara Hahner | 18 | Daughter | — | Pennsylvania |
| 35 | Robert Hahner | 12 | Son | — | Pennsylvania |
| 36 | Charles Hahner | 24 | Son | Helper | Pennsylvania |
| 37 | Celcia Hahner | 24 | Daughter-in-law | — | Pennsylvania |
| 38 | Charles Hahner | 3 | Grandson | — | Pennsylvania |
| 39 | David Hahner | 1 | Grandson | — | Pennsylvania |
| 40 | Elizabeth Hahner | 31 | Daughter-in-law | Clerical | 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)