JF
John Flaherty — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this John Flaherty across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1893), then head of a 7-person household.
Age 47
b. ~1893
Male
Head
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Flaherty |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Duquesne |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Watchman |
| Industry | Steel Works |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 22 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Watchman |
| Township / Ward | Duquesne |
| Est. Birth Year | ~1893 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Mary Flaherty | Daughter | — | 14 | ~1926 |
| John Flaherty | Head | — | 47 | ~1893 |
| Helen Flaherty | Spouse | — | 41 | ~1899 |
| Patricia Flaherty | Daughter | — | 1 | ~1939 |
| Nora Flaherty | Daughter | — | 12 | ~1928 |
| John Flaherty | Son | — | 10 | ~1930 |
| Joseph Flaherty | Son | — | 7 | ~1933 |
Census Appearances
1920
Allegheny, Pennsylvania
Head, age 23
Allegheny, Pennsylvania · implied b. ~1897 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Flaherty |
| Given Name | John P. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Ireland |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Laborer |
| Industry | Plumber Co |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Home Owned/Rented | R |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1930
Allegheny, Pennsylvania
Head, age 36
Allegheny, Pennsylvania · implied b. ~1894
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Flaherty |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1915 |
| Age at First Marriage | 21 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Watchman |
| Industry | Steel mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 25 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Allegheny-County, Pennsylvania
Head, age 47
Allegheny-County, Pennsylvania · implied b. ~1893 — 7 household members
| Surname | Flaherty |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Duquesne |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Occupation | Watchman |
| Industry | Steel Works |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 22 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 John Flaherty across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Flaherty
Head · 1940 · age 47 · b. ~1893 · 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-t0627-03402-00108)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Andrew Jackulski | 71 | Head | Bartender | Poland |
| 2 | Mary Jackulski | 60 | Wife | Cook | Poland |
| 3 | Josephine Jackulski | 29 | Daughter | Waitress | Pennsylvania |
| 4 | Manda Jackulski | 23 | Daughter | Saleslady | Pennsylvania |
| 5 | Norma Jackulski | 9 | Granddaughter | — | Pennsylvania |
| 6 | John Flynn | 36 | Head | First Helper | Pennsylvania |
| 7 | Norma Flynn | 35 | Wife | — | Pennsylvania |
| 8 | Edwin Vonodo | 30 | Head | Electrical Tester | Pennsylvania |
| 9 | Catherine Vonodo | 31 | Wife | — | Pennsylvania |
| 10 | Robert Vonodo | 3 | Son | — | Pennsylvania |
| 11 | John Flaherty THIS PERSON | 47 | Head | Watchman | Ireland |
| 12 | Helen Flaherty | 41 | Wife | — | Ireland |
| 13 | Mary Flaherty | 14 | Daughter | — | Pennsylvania |
| 14 | Nora Flaherty | 12 | Daughter | — | Pennsylvania |
| 15 | John Flaherty | 10 | Son | — | Pennsylvania |
| 16 | Joseph Flaherty | 7 | Son | — | Pennsylvania |
| 17 | Patricia Flaherty | 1 | Daughter | — | Pennsylvania |
| 18 | August Adomaitis | 54 | Head | Machinist | Lithuania |
| 19 | Elizabeth Adomaitis | 48 | Wife | — | Lithuania |
| 20 | George Adomaitis | 22 | Son | Recorder | Pennsylvania |
| 21 | Elizabeth Adomaitis | 20 | Daughter | Housework | Pennsylvania |
| 22 | Charles Adomaitis | 19 | Son | Laborer | Pennsylvania |
| 23 | Hedwig Adomaitis | 17 | Daughter | — | Pennsylvania |
| 24 | August Adomaitis | 15 | Son | — | Pennsylvania |
| 25 | Antonio Leisonauer | 52 | Head | — | Hungary |
| 26 | Joseph Leisonauer | 38 | Son | Laborer | Pennsylvania |
| 27 | Margaret Leisonauer | 32 | Daughter-in-law | — | Pennsylvania |
| 28 | George Vonas | 46 | Head | — | Hungary |
| 29 | Mary Vonas | 39 | Wife | — | Hungary |
| 30 | Anita Vonas | 20 | Daughter | — | Pennsylvania |
| 31 | George Jr. Vonas | 17 | Son | — | Pennsylvania |
| 32 | Elizabeth Starks | 48 | Head | — | Hungary |
| 33 | Joseph Starks | 25 | Son | Laborer | Pennsylvania |
| 34 | John Starks | 18 | Son | New Worker | Pennsylvania |
| 35 | Felix Fuller | 53 | Head | Craneman | Pennsylvania |
| 36 | Elizabeth Fuller | 50 | Wife | — | Pennsylvania |
| 37 | Felix Fuller | 13 | Son | — | Pennsylvania |
| 38 | Melvin Fuller | 11 | Son | — | Pennsylvania |
| 39 | Doris May Fuller | 9 | Daughter | — | Pennsylvania |
| 40 | Leonard Fuller | 5 | Son | — | 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)