TB
Thomas Brennan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Schuylkill-County, Pennsylvania
Our Model Tree links this Thomas Brennan across the 1920, 1930 and 1940 US Censuses in Schuylkill-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents John & John — first a son (b.~1913), then head of a 8-person household.
Age 27
b. ~1913
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Schuylkill-County, Pennsylvania |
| Surname | Brennan |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Heckscher-ville |
| 1935 Residence (County) | Schuylkill |
| Additional Details | |
| Occupation | New Worker |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | New Worker |
| Township / Ward | Heckscherville |
| Est. Birth Year | ~1913 |
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 Thomas | Age | Birth yr |
|---|---|---|---|---|
| Helen Brennan | Daughter | — | 25 | ~1915 |
| William Brennan | Son | — | 29 | ~1911 |
| John Brennan | Son | — | 21 | ~1919 |
| Elizabeth Brennan | Daughter | — | 19 | ~1921 |
| Thomas Brennan | Son | — | 27 | ~1913 |
| John Brennan | Head | — | 63 | ~1877 |
| Ellen Brennan | Spouse | — | 62 | ~1878 |
| Lucy Brennan | Daughter | — | 24 | ~1916 |
Census Appearances
1920
Schuylkill, Pennsylvania
Son, age 7
Schuylkill, Pennsylvania · implied b. ~1913 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | Thomas V |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Schuylkill, Pennsylvania
Son, age 17
Schuylkill, Pennsylvania · implied b. ~1913 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| 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 27
Schuylkill-County, Pennsylvania · implied b. ~1913 — 8 household members
| Surname | Brennan |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Heckscher-ville |
| 1935 Residence (County) | Schuylkill |
| Occupation | New Worker |
| 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 Thomas Brennan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Brennan (~0.92 confidence) and father John Brennan (~0.92 confidence) and mother Ellen Brennan (~0.92 confidence) and mother Ellen Brennan (~0.92 confidence) and mother Ellie Brennan (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Brennan
b. ~1879
Source father
● Household
· direct · ~0.92
Father
John Brennan
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Ellen Brennan
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Ellen Brennan
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Ellie Brennan
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Brennan
Son · 1940 · age 27 · b. ~1913 · Pennsylvania
★ You are viewing this record
Sibling
John Brennan
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Brennan
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lucy Brennan
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Brennan
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Brennan
Sibling · 1940 · age 29
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-t0627-03601-00534)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William Ryan | 58 | Head | Miner | Pennsylvania |
| 2 | Frances Ryan | 46 | Wife | — | Pennsylvania |
| 3 | John Ryan | 25 | Son | Laborer | Pennsylvania |
| 4 | Catherine Ryan | 21 | Daughter | Cooks Helper | Pennsylvania |
| 5 | Thomas Ryan | 19 | Son | New Worker | Pennsylvania |
| 6 | Gerald Brennan | 38 | Brother-in-law | Laborer | Pennsylvania |
| 7 | John Brennan | 63 | Head | Laborer | Pennsylvania |
| 8 | Ellen Brennan | 62 | Wife | — | Pennsylvania |
| 9 | William Brennan | 29 | Son | Timekeeper | Pennsylvania |
| 10 | Thomas Brennan THIS PERSON | 27 | Son | New Worker | Pennsylvania |
| 11 | Helen Brennan | 25 | Daughter | Clerk | Pennsylvania |
| 12 | Lucy Brennan | 24 | Daughter | New Worker | Pennsylvania |
| 13 | John Jr. Brennan | 21 | Son | — | Pennsylvania |
| 14 | Elizabeth Brennan | 19 | Daughter | — | Pennsylvania |
| 15 | Lawrence Hollahan | 50 | Head | Clerk | Pennsylvania |
| 16 | Regina Hollahan | 46 | Wife | — | Pennsylvania |
| 17 | James Hollahan | 21 | Son | C.C.C. | Pennsylvania |
| 18 | Catherine Hollahan | 19 | Daughter | Cooks Helper | Pennsylvania |
| 19 | Agnes Hollahan | 15 | Daughter | — | Pennsylvania |
| 20 | Edward Hollahan | 14 | Son | — | Pennsylvania |
| 21 | Lawrence Hollahan | 11 | Son | — | Pennsylvania |
| 22 | Dolores Hollahan | 6 | Daughter | — | Pennsylvania |
| 23 | Mary Martin | 18 | Daughter | — | Pennsylvania |
| 24 | Mary Regina Martin | 1 | Granddaughter | — | Pennsylvania |
| 25 | Jerry Callaghan | 50 | Head | — | Pennsylvania |
| 26 | Harold Callaghan | 26 | Son | Shovel Oiler | Pennsylvania |
| 27 | Anna Hughes | 70 | Head | — | Pennsylvania |
| 28 | Richard Hughes | 41 | Son | Laborer | Pennsylvania |
| 29 | Richard Quinn | 54 | Head | Laborer | Pennsylvania |
| 30 | Mary Quinn | 49 | Wife | — | Pennsylvania |
| 31 | Mary E. Quinn | 28 | Daughter | Seamstress | Pennsylvania |
| 32 | Robert Quinn | 12 | Son | — | Pennsylvania |
| 33 | Leroy R. Purcell | 39 | Head | Physician | Pennsylvania |
| 34 | Helen Purcell | 34 | Wife | Nurse | Pennsylvania |
| 35 | Mary K. Purcell | 5 | Daughter | — | Pennsylvania |
| 36 | Marguerite Purcell | 42 | Sister | Clerk | Pennsylvania |
| 37 | Michael Mahoney | 45 | Head | Proprietor | Pennsylvania |
| 38 | Julia Mahoney | 42 | Sister | — | Pennsylvania |
| 39 | Anna Maley | 55 | Head | — | Pennsylvania |
| 40 | Bridget Maley | 28 | Daughter | Seamstress | Pennsylvania |
Pedigree Summary
Thomas + 5 siblings
Gen 1 · 5 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)