TC
Thomas Callahan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mercer-County, New Jersey
Our Model Tree links this Thomas Callahan across the 1920, 1930 and 1940 US Censuses in Mercer-County, New Jersey (XGBoost, ~Confirmed), with identified parents Thomas & Thomas — first a son (b.~1909), then head of a 13-person household.
Age 31
b. ~1909
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, New Jersey |
| Surname | CALLAHAN |
| Given Name | THOMAS |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Trenton City |
| 1935 Residence (County) | Mercer |
| Additional Details | |
| Occupation | clerk |
| Industry | State |
| Class of Worker | GW |
| Hours Worked | 16 |
| Income (1939) | 720 |
| Highest Grade | H-8 |
| 1935 Residence | Same Place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Clerk |
| Township / Ward | Trenton City |
| Est. Birth Year | ~1909 |
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.
13 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Thomas Cochran | Son | — | ~1940 | |
| Jean Spitz | Daughter | — | 22 | ~1918 |
| Thomas Callahan | Son | — | 31 | ~1909 |
| Eleanor Callahan | Daughter | — | 21 | ~1919 |
| Dolores Callahan | Daughter | — | 8 | ~1932 |
| Marian Callahan | Daughter | — | 12 | ~1928 |
| Ervin Cochran | Other | — | 24 | ~1916 |
| Marie Callahan | Daughter | — | 16 | ~1924 |
| Clara Callahan | Head | — | 50 | ~1890 |
| Hugh Callahan | Son | — | 17 | ~1923 |
| Madlyn Callahan | Daughter | — | 10 | ~1930 |
| Edward Spitz | Other | — | 25 | ~1915 |
| Doris Cochran | Daughter | — | 24 | ~1916 |
Census Appearances
1920
Mercer, New …
Son, age 11
Mercer, New Jersey · implied b. ~1909 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | Thomas J Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Mercer, New …
Son, age 21
Mercer, New Jersey · implied b. ~1909 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | Thomas Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | Meat-Cutter |
| Industry | Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Mercer-County, New …
Son, age 31
Mercer-County, New Jersey · implied b. ~1909 — 13 household members
| Surname | CALLAHAN |
| Given Name | THOMAS |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Trenton City |
| 1935 Residence (County) | Mercer |
| Occupation | clerk |
| Industry | State |
| Class of Worker | GW |
| Hours Worked | 16 |
| Income (1939) | 720 |
| Highest Grade | H-8 |
| 1935 Residence | Same Place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 Callahan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Callahan (~0.92 confidence) and father Thomas Callahan (~0.92 confidence) and mother Clara Callahan (~0.92 confidence) and mother Sara Callahan (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Callahan
b. ~1882
Source father
● Household
· direct · ~0.92
Father
Thomas Callahan
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Clara Callahan
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Sara Callahan
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Callahan
Son · 1940 · age 31 · b. ~1909 · New Jersey
★ You are viewing this record
Sibling
Jean Spitz
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marian Callahan
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Cochran
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Callahan
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dolores Callahan
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Doris Cochran
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Madlyn Callahan
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hugh Callahan
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleanor Callahan
Sibling · 1940 · age 21
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 — Mercer-County, New Jersey
Open full size
1940 US Federal Census — Mercer-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02437-00280)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ellen Drakeford | 60 | Sister in law | Burling | New Jersey |
| 2 | James Close | 61 | Head | Watchman | Pennsylvania |
| 3 | Mary Close | 52 | Wife | — | Pennsylvania |
| 4 | Josephine Close | 21 | Daughter | — | New Jersey |
| 5 | Caroline Close | 17 | Daughter | — | New Jersey |
| 6 | Maurice Shellura | 41 | Lodger | Carpenter | New York |
| 7 | Hazel Warning | 42 | Lodger | Mangle Operator | Pennsylvania |
| 8 | Robert L. Minnick | 39 | Head | Candy Salesman | Pennsylvania |
| 9 | E. Romelia Minnick | 38 | Wife | P.B.X. Operator | Pennsylvania |
| 10 | Clara Callahan | 50 | Head | — | New Jersey |
| 11 | Thomas Callahan THIS PERSON | 31 | Son | Clerk | New Jersey |
| 12 | Eleanor Callahan | 21 | Daughter | — | New Jersey |
| 13 | Hugh Callahan | 17 | Son | Helper | New Jersey |
| 14 | Marie Callahan | 16 | Daughter | — | New Jersey |
| 15 | Marian Callahan | 12 | Daughter | — | New Jersey |
| 16 | Madlyn Callahan | 10 | Daughter | — | New Jersey |
| 17 | Dolores Callahan | 8 | Daughter | — | New Jersey |
| 18 | Ervin Cochran | 24 | Son in law | Clerk | New Jersey |
| 19 | Doris Cochran | 24 | Daughter | — | New Jersey |
| 20 | Thomas Cochran | 0 | Son | — | New Jersey |
| 21 | Edward Spitz | 25 | Son in law | Selector | New Jersey |
| 22 | Jean Spitz | 22 | Daughter | File Clerk | New Jersey |
| 23 | Otto Cieslikowski | 44 | Head | Helper | New Jersey |
| 24 | Helen Cieslikowski | 41 | Wife | Cleaner | New Jersey |
| 25 | Leo Lanning | 48 | Head | Newspaper | Pennsylvania |
| 26 | Beatrice Lanning | 45 | Sister | — | Pennsylvania |
| 27 | Genevieve Donadre | 49 | Sister | — | Pennsylvania |
| 28 | Thomas Fark | 42 | Head | Custodian Engineer | New Jersey |
| 29 | Mary Fark | 32 | Wife | — | New Jersey |
| 30 | Mary Manning | 52 | Sister in law | Rubber Worker | New Jersey |
| 31 | Harry L. Walker | 36 | Head | Electrician | Pennsylvania |
| 32 | Jeanne Walker | 36 | Wife | Telephone Operator | New York |
| 33 | Alan Walker | 3 | Son | — | New Jersey |
| 34 | Sarah Walke | 49 | Head | Clerk | New Jersey |
| 35 | Nellie K. Walke | 56 | Sister | — | Ohio |
| 36 | John Reid | 34 | Head | Assembler | New Jersey |
| 37 | Emma Reid | 35 | Wife | — | New Jersey |
| 38 | Bessie Reid | 15 | Daughter | — | New Jersey |
| 39 | John Reid | 10 | Son | — | New Jersey |
| 40 | George Reid | 9 | Son | — | New Jersey |
Related Census Records
Pedigree Summary
Thomas + 9 siblings
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)