JB
James Brown — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this James Brown across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Peter & Joseph — first a son (b.~1910), then head of a 4-person household.
Age 30
b. ~1910
Male
Son
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Brown |
| Given Name | James O. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Fireman |
| Industry | Steam Railway |
| Class of Worker | PW |
| Hours Worked | 16 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Fireman |
| Township / Ward | Pittsburgh |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Peter Brown | Head | — | 54 | ~1886 |
| Peter Brown | Other | — | 4 | ~1936 |
| Erma Brown | Other | — | 27 | ~1913 |
| James Brown | Son | — | 30 | ~1910 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 9
Allegheny, Pennsylvania · implied b. ~1911 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | James E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 19
Allegheny, Pennsylvania · implied b. ~1911 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | James E |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Labourer |
| Industry | Steel mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 30
Allegheny-County, Pennsylvania · implied b. ~1910 — 4 household members
| Surname | Brown |
| Given Name | James O. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Occupation | Fireman |
| Industry | Steam Railway |
| Class of Worker | PW |
| Hours Worked | 16 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| 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 Brown across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Peter Brown (~0.92 confidence) and father Joseph Brown (~0.92 confidence) and father Joseph Brown (~0.92 confidence) and mother Minnie Brown (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Peter Brown
b. ~1886
Source father
● Household
· direct · ~0.92
Father
Joseph Brown
b. ~1882
Source father
● Household
· direct · ~0.92
Father
Joseph Brown
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Minnie Brown
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Brown
Son · 1940 · age 30 · b. ~1910 · 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-t0627-03662-00498)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Albert G. Gladora | 24 | Head | Junior Clerk | Pennsylvania |
| 42 | Margaret L. Gladora | 24 | Wife | — | Pennsylvania |
| 43 | Thomas J. Kusiak | 55 | Head | Machinist | Pennsylvania |
| 44 | Frances J. Kusiak | 49 | Wife | — | Pennsylvania |
| 45 | Martha D. Morningstar | 55 | Head | Sewing Teacher | Pennsylvania |
| 46 | Phineas Reynolds | 82 | Head | Tapstaff | Pennsylvania |
| 47 | Alice L. Reynolds | 65 | Wife | — | Pennsylvania |
| 48 | Charlotte C. Jefferies | 66 | Niece | — | Pennsylvania |
| 49 | William E. Fray | 31 | Head | Equipment Clerk | Pennsylvania |
| 50 | Ruth E. Fray | 29 | Wife | — | Pennsylvania |
| 51 | Stella M. Fray | 5 | Daughter | — | Pennsylvania |
| 52 | William E. Jr. Fray | 1 | Son | — | Pennsylvania |
| 53 | James M. Meredith | 24 | Head | Serving Clerk | Pennsylvania |
| 54 | Valeria M. Meredith | 23 | Wife | — | Pennsylvania |
| 55 | James M. Meredith | 1 | Son | — | Pennsylvania |
| 56 | Ada B. Holmes | 58 | Head | — | Italy |
| 57 | Robert V. Holmes | 32 | Son | Painter Decorator | Pennsylvania |
| 58 | Horace A. Holmes | 30 | Son | Painting House | Pennsylvania |
| 59 | Eugene S. Holmes | 24 | Son | Painter | Pennsylvania |
| 60 | Robert E. Denne | 22 | Head | Laborer | Tennessee |
| 61 | Renata G. Denne | 22 | Wife | — | Pennsylvania |
| 62 | Rose M. Denne | 0 | Daughter | — | Pennsylvania |
| 63 | Peter J. Brown | 54 | Head | Vocation Teacher | Pennsylvania |
| 64 | James O. Brown THIS PERSON | 30 | Son | Fireman | Pennsylvania |
| 65 | Erma B. Brown | 27 | Daughter-in-law | — | Ohio |
| 66 | Peter James Brown | 4 | Grandson | — | Pennsylvania |
| 67 | George Hollender | 60 | Head | Manager | Ohio |
| 68 | Blanche M. Hollender | 63 | Wife | — | Pennsylvania |
| 69 | Alvin A. Ringer | 29 | Head | Traveling Salesman | Pennsylvania |
| 70 | Irene R. Ringer | 29 | Wife | — | Pennsylvania |
| 71 | Arla M. Ringer | 5 | Daughter | — | Pennsylvania |
| 72 | House Under Construction Ringer | None | Lodger | — | — |
| 73 | Roman S. Enkee | 38 | Head | Salesman | Pennsylvania |
| 74 | Grace C. Enkee | 38 | Wife | — | Pennsylvania |
| 75 | James S. Enkee | 13 | Son | — | Pennsylvania |
| 76 | Berton S. Clark | 27 | Head | Photographer | Illinois |
| 77 | Dorothy M. Clark | 23 | Wife | Entertainer | Illinois |
| 78 | Linn D. Aspernhalder | 27 | Head | Teacher | Pennsylvania |
| 79 | Edith J. Aspernhalder | 30 | Wife | Stenographer | Pennsylvania |
| 80 | Edison S. Reed | 37 | Head | Asst. Manager | Pennsylvania |
Related Census Records
Pedigree Summary
James
Gen 1 · 4 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)