MH
Mary Hammond — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Hammond across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Sara & James — first a daughter (b.~1903), then head of a 3-person household.
Age 37
b. ~1903
Female
Daughter
Born: West Virginia
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Hammond |
| Given Name | Mary R. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | West Virginia |
| 1935 Residence (City) | Tarentum Boro |
| Additional Details | |
| Occupation | 50 |
| Industry | office clerk |
| Class of Worker | Borough Office |
| Highest Grade | H-4 |
| Birth State | West Virginia |
| Birth Country | United States |
| Birthplace (normalized) | west virginia |
| Occupation | 50 |
| Township / Ward | Tarentum Boro |
| Est. Birth Year | ~1903 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Hammond | Daughter | — | 37 | ~1903 |
| Catherine Hammond | Daughter | — | 30 | ~1910 |
| Sarah Hammond | Head | — | 64 | ~1876 |
Census Appearances
1920
Allegheny, Pennsylvania
Daughter, age 17
Allegheny, Pennsylvania · implied b. ~1903 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hammond |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | West Virginia |
| Father's Birthplace | West Virginia |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | West Virginia |
| Birth Country | United States |
| Birthplace (normalized) | west virginia |
1930
Allegheny, Pennsylvania
Daughter, age 28
Allegheny, Pennsylvania · implied b. ~1902 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hammond |
| Given Name | Mary R |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | West Virginia |
| Father's Birthplace | West Virginia |
| Mother's Birthplace | Pennsylvania |
| Occupation | Clerk |
| Industry | Bank |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | West Virginia |
| Birth Country | United States |
| Birthplace (normalized) | west virginia |
1940
Allegheny-County, Pennsylvania
Daughter, age 37
Allegheny-County, Pennsylvania · implied b. ~1903 — 3 household members
| Surname | Hammond |
| Given Name | Mary R. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | West Virginia |
| 1935 Residence (City) | Tarentum Boro |
| Occupation | 50 |
| Industry | office clerk |
| Class of Worker | Borough Office |
| Highest Grade | H-4 |
| Birth State | West Virginia |
| Birth Country | United States |
| Birthplace (normalized) | west virginia |
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 Hammond across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Sara Hammond (~0.92 confidence) and father James Hammond (~0.92 confidence) and mother Sarah Hammond (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Sara Hammond
b. ~1873
Source mother
● Household
· direct · ~0.92
Father
James Hammond
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Sarah Hammond
b. ~1876
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Hammond
Daughter · 1940 · age 37 · b. ~1903 · Pennsylvania
★ You are viewing this record
Sibling
Catherine Hammond
Sibling · 1940 · age 30
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-t0627-03419-00011)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Shirley Ann Clever | 3 | daughter | — | Pennsylvania |
| 2 | John G. Jr. Erving | 28 | head | Glass Cutter | Pennsylvania |
| 3 | Phyllis G. Erving | 24 | wife | — | Pennsylvania |
| 4 | Mona Lou Erving | 6 | daughter | — | Pennsylvania |
| 5 | John G. Erving | 2 | son | — | Pennsylvania |
| 6 | Rachel J. G. Atkinson | 70 | head | — | Pennsylvania |
| 7 | Rachel J. Atkinson | 32 | daughter | 40 | Pennsylvania |
| 8 | Lilly Mckenna | 48 | daughter | 28 | Pennsylvania |
| 9 | Jack Mckenna | 18 | grandson | — | Pennsylvania |
| 10 | Robert Mckenna | 17 | grandson | — | Pennsylvania |
| 11 | — | None | — | — | — |
| 12 | Edwin G. Mcmeans | 33 | head | 24 | Pennsylvania |
| 13 | Ethel D. Mcmeans | 32 | wife | — | Pennsylvania |
| 14 | Shirley A. Mcmeans | 5 | daughter | — | Pennsylvania |
| 15 | Janet L. Mcmeans | 2 | daughter | — | Pennsylvania |
| 16 | Rosalia Mornschein | 69 | head | — | Hungary |
| 17 | Byron H. Wagner | 25 | head | Gager | Pennsylvania |
| 18 | Utha B. Wagner | 23 | wife | — | Pennsylvania |
| 19 | Harold Rhaner | 48 | head | 32 | Maryland |
| 20 | Elsie Rhaner | 44 | wife | — | Pennsylvania |
| 21 | Clara E. Hunter | 83 | head | — | Pennsylvania |
| 22 | Thomas Hunter | 65 | brother | — | Pennsylvania |
| 23 | Sarah J. Hammond | 64 | head | — | Pennsylvania |
| 24 | Mary R. Hammond THIS PERSON | 37 | daughter | 50 | West Virginia |
| 25 | Catherine Hammond | 30 | daughter | 45 | Pennsylvania |
| 26 | Elmer C. Brinke | 32 | head | 0 | Pennsylvania |
| 27 | Ada Brinke | 28 | wife | — | Pennsylvania |
| 28 | Janice Brinke | 7 | daughter | — | Pennsylvania |
| 29 | Kenneth R. Bryan | 29 | head | 24 | Pennsylvania |
| 30 | Helen M. Bryan | 22 | wife | — | Pennsylvania |
| 31 | Marlene Bryan | 3 | daughter | — | Pennsylvania |
| 32 | Hugh D. Mcdinnis | 28 | head | 42 | Pennsylvania |
| 33 | Velma Mcdinnis | 24 | wife | — | Pennsylvania |
| 34 | Richard L. Mcdinnis | 4 | son | — | Pennsylvania |
| 35 | Kay Jean Mcdinnis | 1 | daughter | — | Pennsylvania |
| 36 | Edith Mcdinnis | 23 | sister | 40 | Pennsylvania |
| 37 | Earl J. Mahan | 37 | head | 56 | Pennsylvania |
| 38 | Veda Mahan | 36 | wife | — | Pennsylvania |
| 39 | James Mahan | 14 | daughter | — | Pennsylvania |
| 40 | Ellen J. Stuart | 79 | mother-in-law | — | Pennsylvania |
Pedigree Summary
Mary + 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)