WC
William Callahan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Erie-County, New York
Our Model Tree links this William Callahan across the 1920, 1930 and 1940 US Censuses in Erie-County, New York (XGBoost, ~Confirmed), with identified parents Patrick & Patrick — first a son (b.~1912), then head of a 5-person household.
Age 28
b. ~1912
Male
Son
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Erie-County, New York |
| Surname | Callahan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Buffalo City |
| 1935 Residence (County) | Erie |
| Additional Details | |
| Occupation | Repair Man |
| Industry | Steel Mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same Place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Repair Man |
| Township / Ward | Buffalo City |
| Est. Birth Year | ~1912 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Francis Callahan | Son | — | 20 | ~1920 |
| James Callahan | Son | — | 24 | ~1916 |
| Patrick Callahan | Head | — | 61 | ~1879 |
| Joseph Callahan | Son | — | 26 | ~1914 |
| William Callahan | Son | — | 28 | ~1912 |
Census Appearances
1920
Erie, New …
Son, age 8
Erie, New York · implied b. ~1912 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
Erie, New …
Son, age 18
Erie, New York · implied b. ~1912 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | Inspector |
| Industry | Steel Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Erie-County, New …
Son, age 28
Erie-County, New York · implied b. ~1912 — 5 household members
| Surname | Callahan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Buffalo City |
| 1935 Residence (County) | Erie |
| Occupation | Repair Man |
| Industry | Steel Mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same Place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 William Callahan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Patrick Callahan (~0.92 confidence) and father Patrick Callahan (~0.92 confidence) and mother Margaret Callahan (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Patrick Callahan
b. ~1877
Source father
● Household
· direct · ~0.92
Father
Patrick Callahan
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Margaret Callahan
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Callahan
Son · 1940 · age 28 · b. ~1912 · New York
★ You are viewing this record
Sibling
Joseph Callahan
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Callahan
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Callahan
Sibling · 1940 · age 24
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 — Erie-County, New York
Open full size
1940 US Federal Census — Erie-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02823-00084)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Paul Kearns | 18 | Head | — | New York |
| 2 | Robert Kearns | 9 | Son | — | New York |
| 3 | Cornelius Murphy | 39 | Head | Electrician | New York |
| 4 | Agnes Murphy | 42 | Wife | — | New York |
| 5 | Monica Murphy | 12 | Daughter | — | New York |
| 6 | Cornelius Jr. Murphy | 6 | Son | — | New York |
| 7 | Paul Mraz | 56 | Head | Loading | Slovakia |
| 8 | Anna Mraz | 51 | Wife | — | Slovakia |
| 9 | Frank Mraz | 25 | Son | — | New York |
| 10 | Theresa Mraz | 23 | Daughter | Maid | New York |
| 11 | Helen Mraz | 13 | Daughter | — | New York |
| 12 | Paul Mraz | 10 | Son | — | New York |
| 13 | Louise Safer | 60 | Head | — | New York |
| 14 | Walter Safer | 27 | Son | Loader | New York |
| 15 | Paul Toman | 49 | Head | Laborer | Czechoslovakia |
| 16 | Theresa Toman | 46 | Wife | Charwoman | Czechoslovakia |
| 17 | Frank Toman | 20 | Son | — | Czechoslovakia |
| 18 | Harry Pappas | 50 | Lodger | Candy Maker | Greece |
| 19 | Ellen Hoare | 59 | Head | — | New York |
| 20 | James Hoare | 29 | Son | Loader | New York |
| 21 | John Hoare | 26 | Son | Helper | New York |
| 22 | Thomas Hoare | 24 | Son | Laborer | New York |
| 23 | Helen Hoare | 19 | Daughter | — | New York |
| 24 | Patrick Callahan | 61 | Head | Bridge Tender | New York |
| 25 | William Callahan THIS PERSON | 28 | Son | Repair Man | New York |
| 26 | Joseph Callahan | 26 | Son | Iron Worker | New York |
| 27 | James Callahan | 24 | Son | Messenger | New York |
| 28 | Francis Callahan | 20 | Son | — | New York |
| 29 | Paul Nawrot | 47 | Head | Barber | Poland |
| 30 | Stella Nawrot | 45 | Wife | — | New York |
| 31 | Henry Nawrot | 19 | Son | — | New York |
| 32 | Frank Nawrot | 18 | Son | — | New York |
| 33 | Irene Nawrot | 13 | Daughter | — | New York |
| 34 | Paul Gerabek | 27 | Head | Kettle Operator | New York |
| 35 | Anna Gerabek | 26 | Wife | — | New York |
| 36 | Mary Gerabek | 9 | Daughter | — | New York |
| 37 | Paul Gerabek | 7 | Son | — | New York |
| 38 | Donald Gerabek | 3 | Son | — | New York |
| 39 | Mildred Burns | 36 | Head | — | New York |
| 40 | Robert Burns | 16 | Son | — | New York |
Related Census Records
Pedigree Summary
William + 3 siblings
Gen 1 · 3 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)