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Mary Marshall — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Marshall across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Chas & Lucie — first a daughter (b.~1920), then head of a 6-person household.
Age 20
b. ~1920
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Marshall |
| Given Name | Mary Jane |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 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 | Pittsburgh |
| Est. Birth Year | ~1920 |
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 |
|---|---|---|---|---|
| Mary Marshall | Daughter | — | 20 | ~1920 |
| William Marshall | Head | — | 58 | ~1882 |
| Elsie Handcock | Other | — | 36 | ~1904 |
| William Marshall | Son | — | 23 | ~1917 |
| James Marshall | Son | — | 21 | ~1919 |
| Belle Marshall | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Allegheny, Pennsylvania
Daughter, age
Allegheny, Pennsylvania · implied b. ~1920 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Marshall |
| Given Name | Mary Jane |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Speaks English | none |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Daughter, age 10
Allegheny, Pennsylvania · implied b. ~1920 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Marshall |
| Given Name | Mary Jane |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 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
Daughter, age 20
Allegheny-County, Pennsylvania · implied b. ~1920 — 6 household members
| Surname | Marshall |
| Given Name | Mary Jane |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 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 Mary Marshall across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Chas Marshall (~0.83 confidence) and mother Lucie Marshall (~0.83 confidence) and father William Marshall (~0.92 confidence) and father William Marshall (~0.92 confidence) and father Ira Marshall (~0.92 confidence) and mother Belle Marshall (~0.92 confidence) and mother Belle Marshall (~0.92 confidence). The pedigree spans 2 generations with 7 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.89
Father
Chas Marshall
b. ~1866
Source father>father
● Household
· direct · ~0.83
Mother
Lucie Marshall
b. ~1866
Source father>mother
● Household
· direct · ~0.83
Father
William Marshall
b. ~1882
Source father
● Household
· direct · ~0.92
Father
William Marshall
b. ~1888
Source father
● Household
· direct · ~0.92
Father
Ira Marshall
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Belle Marshall
b. ~1889
Source mother
● Household
· direct · ~0.92
Mother
Belle Marshall
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Marshall
Daughter · 1940 · age 20 · b. ~1920 · Pennsylvania
★ You are viewing this record
Sibling
William Marshall
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Marshall
Sibling · 1940 · age 21
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-t0627-03662-00566)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | H Stephen | 8 | Son | — | Pennsylvania |
| 42 | Mollie Mummy | 31 | Servant | Housemaid | Missouri |
| 43 | Wallace M Parker | 36 | Head | Attorney | Pennsylvania |
| 44 | Virginia Parker | 33 | Wife | — | Pennsylvania |
| 45 | Wallace S Parker | 3 | Son | — | Pennsylvania |
| 46 | James L Parker | 1 | Son | — | Pennsylvania |
| 47 | Lillian Wilson | 45 | Nurse | Child Nurse | Pennsylvania |
| 48 | C G Hall | 60 | Head | Merchant | Pennsylvania |
| 49 | Louise Hall | 49 | Wife | — | Netherlands |
| 50 | Mary L Hall | 15 | Daughter | — | Pennsylvania |
| 51 | Elizabeth Gombos | 27 | Maid | House Maid | Pennsylvania |
| 52 | Emile Hess | 20 | Lodger | Traveling Salesman | Pennsylvania |
| 53 | John S Wills | 62 | Head | Checker | Pennsylvania |
| 54 | Helen E Wills | 50 | Sister | Checker | Pennsylvania |
| 55 | Ann Mills Allen | 51 | Sister | — | Pennsylvania |
| 56 | William Marshall | 58 | Head | Vice President | Pennsylvania |
| 57 | Belle W Marshall | 50 | Wife | — | Pennsylvania |
| 58 | William Marshall | 23 | Son | — | Pennsylvania |
| 59 | James M Marshall | 21 | Son | — | Pennsylvania |
| 60 | Mary Jane Marshall THIS PERSON | 20 | Daughter | — | Pennsylvania |
| 61 | Elsie Handcock | 36 | Servant | Servant | N Ireland |
| 62 | Margueritte Martain | 62 | Head | — | Pennsylvania |
| 63 | Nellie May Martain | 60 | Sister | Teacher | Pennsylvania |
| 64 | Blanche Whitfield | 36 | Servant | Servant | Pennsylvania |
| 65 | Dennis Mccartney | 60 | Head | — | Eire Ireland |
| 66 | Minnie Mccartney | 55 | Wife | — | Eire Ireland |
| 67 | Nellie Toms | 50 | Lodger | Cook | Eire Ireland |
| 68 | George Finley | 62 | Head | Manager | Pennsylvania |
| 69 | George Finley | 26 | Nephew | Artist | Canal Zone |
| 70 | Robert J Patterson | 33 | Head | Attendant | Pennsylvania |
| 71 | Edith B Patterson | 30 | Wife | — | Pennsylvania |
| 72 | Robert C Patterson | 8 | Son | — | Pennsylvania |
| 73 | Mary Ann Patterson | 5 | Daughter | — | Pennsylvania |
| 74 | Hulda Robinson | 50 | Head | — | Pennsylvania |
| 75 | Hulda Robinson | 33 | Daughter | Saleslady | Pennsylvania |
| 76 | Sheldon Cervin | 62 | Head | Store Keeper | Pennsylvania |
| 77 | Mabelle Cervin | 55 | Wife | — | Pennsylvania |
| 78 | John Cervin | 30 | Son | Repairman | Pennsylvania |
| 79 | Sheldon Cervin | 27 | Son | — | Pennsylvania |
| 80 | Frank Barr | 27 | Brother in law | Manager | Pennsylvania |
Pedigree Summary
Mary + 2 siblings
Gen 1 · 5 parents
~0.92
Gen 2 · 2 grandparents
~0.83
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)