TC
Thomas Callahan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this Thomas Callahan across the 1920, 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Benj & Thomas — first a son (b.~1915), then head of a 7-person household.
Age 25
b. ~1915
Male
Son
Born: Penna.
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Callahan |
| Given Name | Thomas |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Penna. |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Additional Details | |
| Occupation | bar tender |
| Industry | hotel bar |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1430 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
| Occupation | Bartender |
| Township / Ward | Philadelphia |
| 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| John Callahan | Son | — | 27 | ~1913 |
| Catherine Callahan | Spouse | — | 50 | ~1890 |
| Edward Callahan | Son | — | 22 | ~1918 |
| Margaret Callahan | Daughter | — | 19 | ~1921 |
| Thomas Callahan | Son | — | 25 | ~1915 |
| Helen Callahan | Daughter | — | 18 | ~1922 |
| Thomas Callahan | Head | — | 52 | ~1888 |
Census Appearances
1920
Philadelphia, Pennsylvania
Son, age 4
Philadelphia, Pennsylvania · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Calahan |
| Given Name | Thomas B. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Penna |
| Father's Birthplace | Penna |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
1930
Philadelphia, Pennsylvania
Son, age 15
Philadelphia, Pennsylvania · implied b. ~1915 — 8 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 | 15 |
| Marital Status | Single |
| Birthplace | Penna |
| Father's Birthplace | Penna |
| Mother's Birthplace | Penna |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
1940
Philadelphia-County, Pennsylvania
Son, age 25
Philadelphia-County, Pennsylvania · implied b. ~1915 — 7 household members
| Surname | Callahan |
| Given Name | Thomas |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Penna. |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Occupation | bar tender |
| Industry | hotel bar |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1430 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
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 Benj Calahan (~0.92 confidence) and father Thomas Callahan (~0.92 confidence) and father Thomas Callahan (~0.92 confidence) and mother Catherine Callahan (~0.92 confidence) and mother Margaret Calahan (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Benj Calahan
b. ~1879
Source father
● Household
· direct · ~0.92
Father
Thomas Callahan
b. ~1886
Source father
● Household
· direct · ~0.92
Father
Thomas Callahan
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Catherine Callahan
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Margaret Calahan
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Callahan
Son · 1940 · age 25 · b. ~1915 · Pennsylvania
★ You are viewing this record
Sibling
John Callahan
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Callahan
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Callahan
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Callahan
Sibling · 1940 · age 22
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 — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03691-00823)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Maria Jacobs | 11 | daughter | — | Penna. |
| 2 | Richard Erskine | 44 | head | Carpenter | Penna. |
| 3 | Anna Erskine | 45 | wife | — | Penna. |
| 4 | Catherine Erskine | 11 | daughter | — | Penna. |
| 5 | Jane Erskine | 8 | daughter | — | Penna. |
| 6 | Margaret Cook | 57 | head | — | Penna. |
| 7 | James Cook | 38 | son | Clerk | Penna. |
| 8 | Margaret Cook | 18 | daughter | Office Girl | Penna. |
| 9 | James Enright | 28 | son-in-law | Circuit Breaker | Penna. |
| 10 | Isabella Enright | 20 | daughter | — | Penna. |
| 11 | Joseph Mulligan | 50 | head | Police Officer | Penna. |
| 12 | Helen Mulligan | 46 | wife | — | Penna. |
| 13 | William Mulligan | 20 | son | Car-Checker | Penna. |
| 14 | John Callahan | 61 | boarder | — | Penna. |
| 15 | John Mccullough | 38 | head | Truck Driver | Penna. |
| 16 | Anna Mccullough | 29 | wife | — | Penna. |
| 17 | Patricia Mccullough | 5 | daughter | — | Penna. |
| 18 | John Mccullough | 3 | son | — | Penna. |
| 19 | Carol Mccullough | 2 | daughter | — | Penna. |
| 20 | Thomas Callahan | 52 | head | Manager | Penna. |
| 21 | Catherine Callahan | 50 | wife | — | Penna. |
| 22 | John Callahan | 27 | son | Bar Tender | Penna. |
| 23 | Thomas Callahan THIS PERSON | 25 | son | Bar Tender | Penna. |
| 24 | Edward Callahan | 22 | son | — | Penna. |
| 25 | Margaret Callahan | 19 | daughter | Operator | Penna. |
| 26 | Helen Callahan | 18 | daughter | — | Penna. |
| 27 | George Clarke | 26 | head | Roofer | Penna. |
| 28 | Marie Clarke | 22 | wife | Operator | Penna. |
| 29 | John Curran | 65 | head | — | Penna. |
| 30 | Mary Curran | 71 | wife | — | Penna. |
| 31 | John Jr. Curran | 41 | son | Auto Mechanic | Penna. |
| 32 | Morgan Riley | 41 | head | — | Penna. |
| 33 | Riley | 22 | wife | — | Penna. |
| 34 | Elmer G. Clawson | 20 | head | Laundry Worker | Penna. |
| 35 | Mary Clawson | 18 | wife | — | Penna. |
| 36 | Julian Parker | 26 | brother-in-law | Elevator Operator | Iowa |
| 37 | Arthur Parker | 21 | brother-in-law | — | Penna. |
| 38 | Clara Parker | 0 | niece | — | Penna. |
| 39 | Wilson Price | 77 | head | Watchman | W. Ireland |
| 40 | Margaret Price | 67 | wife | — | W. Ireland |
Pedigree Summary
Thomas + 4 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)