JB
James Byrne — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this James Byrne across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents William & William — first a head (b.~1915), then head of a 9-person household.
Age 25
b. ~1915
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Byrne |
| Given Name | James F |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Automobile Fire Repairer |
| Industry | Vulcanizing Plant |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 452 |
| Highest Grade | No 4 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Automobile Fire Repairer |
| Township / Ward | Pittsburgh |
| Est. Birth Year | ~1915 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Regina Mcdermott | Daughter | — | 20 | ~1920 |
| Bernice Mcdermott | Daughter | — | 29 | ~1911 |
| Mary Byrne | Spouse | — | 26 | ~1914 |
| Mary Mcdermott | Spouse | — | 61 | ~1879 |
| James Byrne | Head | — | 25 | ~1915 |
| Frances Mcdermott | Daughter | — | 26 | ~1914 |
| Mary Mcdermott | Daughter | — | 40 | ~1900 |
| Joseph Mcdermott | Son | — | 23 | ~1917 |
| Timothy Byrne | Son | — | 1 | ~1939 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 3
Allegheny, Pennsylvania · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Byrnes |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 14
Allegheny, Pennsylvania · implied b. ~1916 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Byrnes |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| 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
Head, age 25
Allegheny-County, Pennsylvania · implied b. ~1915 — 9 household members
| Surname | Byrne |
| Given Name | James F |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Occupation | Automobile Fire Repairer |
| Industry | Vulcanizing Plant |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 452 |
| Highest Grade | No 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 James Byrne across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Byrnes (~0.92 confidence) and father William Byrnes (~0.92 confidence) and mother May Byrnes (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Byrnes
b. ~1885
Source father
● Household
· direct · ~0.92
Father
William Byrnes
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
May Byrnes
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Byrne
Head · 1940 · age 25 · b. ~1915 · Pennsylvania
★ You are viewing this record
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-t0627-03661-00259)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Grace Gump | 30 | Daughter | — | Pennsylvania |
| 2 | Rose J. Bowman | 51 | Mother-in-law | — | Pennsylvania |
| 3 | Patrick Coyne | 52 | Head | Paver | Free State Ireland |
| 4 | Bridget Coyne | 53 | Wife | — | Ireland |
| 5 | Margaret A Coyne | 16 | Daughter | Paver | Pennsylvania |
| 6 | James F Byrne THIS PERSON | 25 | Head | Automobile Fire Repairer | Pennsylvania |
| 7 | Mary K Byrne | 26 | Wife | — | Pennsylvania |
| 8 | Timothy J Byrne | 1 | Son | — | Pennsylvania |
| 9 | Mary Mcdermott | 61 | Wife | — | Scotland |
| 10 | Mary T Mcdermott | 40 | Daughter | — | Pennsylvania |
| 11 | Bernice E Mcdermott | 29 | Daughter | Bookkeeper | Pennsylvania |
| 12 | Frances P Mcdermott | 26 | Daughter | Office Clerk | Pennsylvania |
| 13 | Joseph P Mcdermott | 23 | Son | Counterman | Pennsylvania |
| 14 | Regina C Mcdermott | 20 | Daughter | Office Clerk | Pennsylvania |
| 15 | Henry E Arenz | 73 | Head | Machinist | Germany |
| 16 | Carl Arenz | 34 | Son | Salesman | Pennsylvania |
| 17 | Agnes Watson | 30 | Head | — | Pennsylvania |
| 18 | Joseph J Kuenzig | 40 | Head | Manager | Pennsylvania |
| 19 | Edith Kuenzig | 40 | Wife | — | Pennsylvania |
| 20 | John Kuenzig | 19 | Son | — | Pennsylvania |
| 21 | Jeanne Kuenzig | 15 | Daughter | — | Pennsylvania |
| 22 | Robert Kuenzig | 11 | Son | — | Pennsylvania |
| 23 | Joan Kuenzig | 2 | Daughter | — | Pennsylvania |
| 24 | Joseph Wiwel | 49 | Head | Engraver | Pennsylvania |
| 25 | Catherine Wiwel | 46 | Wife | — | Pennsylvania |
| 26 | Catherine Wiwel | 18 | Daughter | — | Pennsylvania |
| 27 | James Flavin | 76 | Uncle | — | Ireland |
| 28 | Michael Driscoll | 51 | Head | Laborer | South Ireland |
| 29 | Nellie Driscoll | 49 | Wife | — | South Ireland |
| 30 | Mary E Driscoll | 18 | Daughter | — | Pennsylvania |
| 31 | Eileen Driscoll | 15 | Daughter | — | Pennsylvania |
| 32 | John Driscoll | 12 | Son | — | Pennsylvania |
| 33 | Sheila Sutton | 35 | Sister | Nurse (Trained) | South Ireland |
| 34 | Martin Wynkoop | 25 | Head | Shipper | Pennsylvania |
| 35 | Ethel Wynkoop | 26 | Wife | — | Pennsylvania |
| 36 | Robert W Woods | 57 | Head | Minister | Pennsylvania |
| 37 | Martha Woods | 56 | Wife | — | Pennsylvania |
| 38 | Catherine Woods | 29 | Daughter | Public Health Nurse | Pennsylvania |
| 39 | Daniel Cuppy | 69 | Head | Watchman | Free State Ireland |
| 40 | Bridget Cuppy | 65 | Wife | — | Free State Ireland |
Related Census Records
Pedigree Summary
James
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)