ML
Mary Larkin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Larkin across the 1910, 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Alvin & Amy — first a daughter (b.~1910), then head of a 8-person household.
Age 30
b. ~1910
Female
Daughter
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Larkin |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Waitress |
| Industry | South Hills High |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 450 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Waitress |
| Township / Ward | Pittsburgh City |
| Est. Birth Year | ~1910 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Larkin | Daughter | — | 30 | ~1910 |
| Alvin Edmunds | Head | — | 65 | ~1875 |
| Sarah Brickel | Other | — | 85 | ~1855 |
| June Larkin | Other | — | 13 | ~1927 |
| Frances Larkin | Other | — | 10 | ~1930 |
| Edmund Richards | Other | — | 16 | ~1924 |
| Earl Edmunds | Son | — | 37 | ~1903 |
| Amy Edmunds | Spouse | — | 63 | ~1877 |
Census Appearances
1910
Allegheny, Pennsylvania
Daughter, age
Allegheny, Pennsylvania · implied b. ~1910 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larkin |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
Allegheny, Pennsylvania
Daughter, age 10
Allegheny, Pennsylvania · implied b. ~1910 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larkin |
| Given Name | Margaret |
| 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 | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Daughter, age 20
Allegheny, Pennsylvania · implied b. ~1910 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larkin |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| 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 30
Allegheny-County, Pennsylvania · implied b. ~1910 — 8 household members
| Surname | Larkin |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Occupation | Waitress |
| Industry | South Hills High |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 450 |
| Highest Grade | Hs 4 |
| 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 Larkin across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Alvin Edmunds (~0.92 confidence) and mother Amy Edmunds (~0.92 confidence) and father Edward Larkin (~0.92 confidence) and mother Elizabeth Larkin (~0.92 confidence) and father John Larkin (~0.92 confidence) and father William Larkin (~0.92 confidence) and mother Grace Larkin (~0.92 confidence) and mother Margaret Larkin (~0.92 confidence). The pedigree spans 1 generation with 8 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Alvin Edmunds
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Amy Edmunds
b. ~1877
Source mother
● Household
· direct · ~0.92
Father
Edward Larkin
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Larkin
b. ~1881
Source mother
● Household
· direct · ~0.92
Father
John Larkin
b. ~1881
Source father
● Household
· direct · ~0.92
Father
William Larkin
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Grace Larkin
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Margaret Larkin
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Larkin
Daughter · 1940 · age 30 · b. ~1910 · Pennsylvania
★ You are viewing this record
Sibling
Earl Edmunds
Sibling · 1940 · age 37
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-t0627-03669-00339)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Betty Bradley | 18 | Chief | — | Pennsylvania |
| 2 | Vincent Couzzi | 38 | Head | Laborer | Italy |
| 3 | Helen Couzzi | 30 | Wife | — | Italy |
| 4 | Ida Couzzi | 12 | Daughter | — | Pennsylvania |
| 5 | Josephine Couzzi | 10 | Daughter | — | Pennsylvania |
| 6 | Rosko Rohrbough | 46 | Head | Repairman | West Virginia |
| 7 | Florence Rohrbough | 46 | Wife | — | Pennsylvania |
| 8 | Andrew Opatchan | 46 | Head | Barber | Poland |
| 9 | Mary B. Opatchan | 38 | Wife | — | Poland |
| 10 | Helen Opatchan | 21 | Daughter | Secretary | Pennsylvania |
| 11 | Andrew Jr. Opatchan | 18 | Son | New Worker | Pennsylvania |
| 12 | Joseph Opatchan | 16 | Son | — | Pennsylvania |
| 13 | John Opatchan | 12 | Son | — | Pennsylvania |
| 14 | Jack Opatchan | 5 | Son | — | Pennsylvania |
| 15 | Marion Opatchan | 2 | Daughter | — | Pennsylvania |
| 16 | George Opatchan | 0 | Son | — | Pennsylvania |
| 17 | John Yourkovich | 67 | Father in law | — | Poland |
| 18 | Mary Yourkovich | 71 | Mother in law | — | Poland |
| 19 | Begins End Of Block E | None | BLOCK F | — | — |
| 20 | Albert Mutschler | 42 | Head | Coppersmith | Germany |
| 21 | Katherine Mutschler | 39 | Wife | — | Germany |
| 22 | Albert Jr. Mutschler | 4 | Son | — | Pennsylvania |
| 23 | Walter Mutschler | 1 | Son | — | Pennsylvania |
| 24 | Alvin Edmunds | 65 | Head | Sta. Engineer | Pennsylvania |
| 25 | Amy Edmunds | 63 | Wife | — | Pennsylvania |
| 26 | Earl Edmunds | 37 | Son | New Worker | Pennsylvania |
| 27 | Mary Larkin THIS PERSON | 30 | Daughter | Waitress | Pennsylvania |
| 28 | June Larkin | 13 | Granddaughter | — | Pennsylvania |
| 29 | Frances Larkin | 10 | Granddaughter | — | Pennsylvania |
| 30 | Sarah Brickel | 85 | Aunt | — | Pennsylvania |
| 31 | Edmund Richards | 16 | Grandson | — | Pennsylvania |
| 32 | Joseph A. Digby | 74 | Head | Retired Janitor | Pennsylvania |
| 33 | Catherine D. Digby | 50 | Wife | — | Pennsylvania |
| 34 | James Curra | 47 | Head | Watchman | Italy |
| 35 | Jenny Curra | 34 | Wife | — | Italy |
| 36 | Anthony Curra | 18 | Son | Floor Varnisher | Pennsylvania |
| 37 | Theresa Curra | 16 | Daughter | — | Pennsylvania |
| 38 | Antoinette Curra | 14 | Daughter | — | Pennsylvania |
| 39 | Agnesia Curra | 11 | Son | — | Pennsylvania |
| 40 | Joseph Curra | 4 | Son | — | Pennsylvania |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 8 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)