JB
John Brennan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Schuylkill-County, Pennsylvania
Our Model Tree links this John Brennan across the 1920, 1930 and 1940 US Censuses in Schuylkill-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Ellen & John — first a son (b.~1919), then head of a 8-person household.
Age 21
b. ~1919
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Schuylkill-County, Pennsylvania |
| Surname | Brennan |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | New Castle |
| 1935 Residence (County) | Schuylkill |
| Additional Details | |
| Occupation | Laborer |
| Industry | Coal Mines |
| Class of Worker | PW |
| Hours Worked | 64 |
| Income (1939) | 454 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Laborer |
| Township / Ward | New Castle |
| Est. Birth Year | ~1919 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Thomas Brennan | Head | — | 51 | ~1889 |
| Ambrose Brennan | Son | — | 11 | ~1929 |
| Francis Brennan | Son | — | 23 | ~1917 |
| Aloysius Brennan | Son | — | 18 | ~1922 |
| Robert Brennan | Son | — | 14 | ~1926 |
| Leo Brennan | Son | — | 15 | ~1925 |
| John Brennan | Son | — | 21 | ~1919 |
| Elizabeth Brennan | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Schuylkill, Pennsylvania
Son, age 1
Schuylkill, Pennsylvania · implied b. ~1919 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Mother Tongue | English |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Schuylkill, Pennsylvania
Son, age 11
Schuylkill, Pennsylvania · implied b. ~1919 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| 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
Schuylkill-County, Pennsylvania
Son, age 21
Schuylkill-County, Pennsylvania · implied b. ~1919 — 8 household members
| Surname | Brennan |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | New Castle |
| 1935 Residence (County) | Schuylkill |
| Occupation | Laborer |
| Industry | Coal Mines |
| Class of Worker | PW |
| Hours Worked | 64 |
| Income (1939) | 454 |
| 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 John Brennan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Ellen Brennan (~0.92 confidence) and father John Brennan (~0.92 confidence) and father Brennan 175 (~0.92 confidence) and mother Regina Brennan (~0.92 confidence) and father Thomas Brennan (~0.92 confidence) and mother Elizabeth Brennan (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Ellen Brennan
b. ~1878
Source mother
● Household
· direct · ~0.92
Father
John Brennan
b. ~1879
Source father
● Household
· direct · ~0.92
Father
Brennan 175
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Regina Brennan
b. ~1889
Source mother
● Household
· direct · ~0.92
Father
Thomas Brennan
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Brennan
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Brennan
Son · 1940 · age 21 · b. ~1919 · Pennsylvania
★ You are viewing this record
Sibling
Robert Brennan
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Brennan
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Aloysius Brennan
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leo Brennan
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ambrose Brennan
Sibling · 1940 · age 11
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 — Schuylkill-County, Pennsylvania
Open full size
1940 US Federal Census — Schuylkill-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03601-00523)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Patricia Ann Quirk | 8 | daughter | — | Pennsylvania |
| 42 | John Quirk | 7 | son | — | Pennsylvania |
| 43 | Frank Quirk | 5 | son | — | Pennsylvania |
| 44 | Edward Quirk | 4 | son | — | Pennsylvania |
| 45 | Joseph Quirk | 3 | son | — | Pennsylvania |
| 46 | Margaret Quirk | 1 | daughter | — | Pennsylvania |
| 47 | Mary E Dougherty | 74 | Head | Teacher Ret | Pennsylvania |
| 48 | Francis Dougherty | 52 | son | Laborer | Pennsylvania |
| 49 | Mary Toppi | 54 | Head | — | Pennsylvania |
| 50 | Catherine Toppi | 35 | daughter | Clerk | Pennsylvania |
| 51 | Ethel Toppi | 35 | daughter | Clerk | Pennsylvania |
| 52 | John Dealin | 74 | Head | — | Pennsylvania |
| 53 | Elizabeth Dealin | 39 | daughter | — | Pennsylvania |
| 54 | Michael Dealin | 35 | son | Laborer | Pennsylvania |
| 55 | Patrick Moran | 62 | Head | Laborer | Pennsylvania |
| 56 | Catherine Moran | 30 | daughter | — | Pennsylvania |
| 57 | Francis Moran | 26 | son | Laborer | Pennsylvania |
| 58 | James Conville | 34 | Head | Laborer | Pennsylvania |
| 59 | Sarah Conville | 34 | wife | — | Pennsylvania |
| 60 | Jerome Conville | 13 | son | — | Pennsylvania |
| 61 | Isabel Conville | 13 | daughter | — | Pennsylvania |
| 62 | Delores Conville | 12 | daughter | — | Pennsylvania |
| 63 | Claire Conville | 9 | son | — | Pennsylvania |
| 64 | Leroy Conville | 7 | son | — | Pennsylvania |
| 65 | Francis Conville | 5 | son | — | Pennsylvania |
| 66 | Kathleen Conville | 3 | daughter | — | Pennsylvania |
| 67 | Theresa Conville | 1 | daughter | — | Pennsylvania |
| 68 | Thomas Brennan | 51 | Head | Laborer | Pennsylvania |
| 69 | Elizabeth Brennan | 50 | wife | — | Pennsylvania |
| 70 | Francis Brennan | 23 | son | Laborer | Pennsylvania |
| 71 | John Brennan THIS PERSON | 21 | son | Laborer | Pennsylvania |
| 72 | Aloysius Brennan | 18 | son | Laborer | Pennsylvania |
| 73 | Leo Brennan | 15 | son | — | Pennsylvania |
| 74 | Robert Brennan | 14 | son | — | Pennsylvania |
| 75 | Ambrose Brennan | 11 | son | — | Pennsylvania |
| 76 | Joseph Grotzky | 46 | head | Laborer | Hungary |
| 77 | Anna Grotzky | 45 | wife | — | Hungary |
| 78 | Alex Grotzky | 12 | son | — | Pennsylvania |
| 79 | Anna Grotzky | 10 | daughter | — | Pennsylvania |
| 80 | Michael Purcell | 41 | Head | Laborer | Pennsylvania |
Pedigree Summary
John + 5 siblings
Gen 1 · 6 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)