WC
William Callahan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Kings-County, New York
Our Model Tree links this William Callahan across the 1920, 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed), with identified parents Thornton & Margaret — first a head (b.~1915), then head of a 5-person household.
Age 25
b. ~1915
Male
Head
Born: New York
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Callahan |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Boro of Brooklyn |
| 1935 Residence (County) | Kings |
| Additional Details | |
| Occupation | Time Keeper |
| Industry | Park Dept |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 668 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Time Keeper |
| Township / Ward | Boro Of Brooklyn |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Callahan | Head | — | 25 | ~1915 |
| Judith Callahan | Daughter | — | 4 | ~1936 |
| Michelle Callahan | Daughter | — | 2 | ~1938 |
| Elizabeth Callahan | Spouse | — | 21 | ~1919 |
| Helen Lambele | Other | — | 48 | ~1892 |
Census Appearances
1920
Kings, New …
Son, age 5
Kings, New York · implied b. ~1915 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Calahan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | none |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
Kings, New …
Son, age 15
Kings, New York · implied b. ~1915 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Kings-County, New …
Head, age 25
Kings-County, New York · implied b. ~1915 — 5 household members
| Surname | Callahan |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Boro of Brooklyn |
| 1935 Residence (County) | Kings |
| Occupation | Time Keeper |
| Industry | Park Dept |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 668 |
| Highest Grade | Hs 3 |
| 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 Thornton Callahan (~0.92 confidence) and mother Margaret Callahan (~0.92 confidence) and father John Calahan (~0.92 confidence) and mother Mary Calahan (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thornton Callahan
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Margaret Callahan
b. ~1886
Source mother
● Household
· direct · ~0.92
Father
John Calahan
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Mary Calahan
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Callahan
Head · 1940 · age 25 · b. ~1915 · New York
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Kings-County, New York
Open full size
1940 US Federal Census — Kings-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02609-00464)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Thomas Ingoglia | 40 | Son | Shipping Clerk | Italy |
| 42 | Caspar Ingoglia | 54 | Head | Filler | Italy |
| 43 | Jennie Ingoglia | 50 | Wife | 0 | Italy |
| 44 | Bartholomew Ingoglia | 21 | Son | Helper | New York |
| 45 | Marie Ingoglia | 19 | Daughter | New Worker | New York |
| 46 | Frank Ingoglia | 9 | Son | — | New York |
| 47 | Andrew Ingoglia | 25 | Head | Manager | New York |
| 48 | Mary Ingoglia | 24 | Wife | 0 | Italy |
| 49 | Andrew Ingoglia | 2 | Son | — | New York |
| 50 | Benny Pirraglia | 48 | Head | Clerk | Italy |
| 51 | Theresa Pirraglia | 31 | Wife | 0 | Italy |
| 52 | Anthony Pirraglia | 14 | Son | 0 | Italy |
| 53 | Anna Pirraglia | 12 | Daughter | — | New York |
| 54 | Mary Pirraglia | 10 | Daughter | — | New York |
| 55 | John W. Walker | 25 | Head | Clerk | New York |
| 56 | Violet Walker | 22 | Wife | 0 | New York |
| 57 | John Jr. Walker | 3 | Son | — | New York |
| 58 | Robert Walker | 2 | Son | — | New York |
| 59 | Francis Walker | 21 | Brother | New Worker | New York |
| 60 | Augustus Frankus | 47 | Head | Kitchen Help | Lithuania |
| 61 | Jenna Frankus | 35 | Wife | 0 | Lithuania |
| 62 | Olga Frankus | 7 | Daughter | — | New York |
| 63 | Daniel Recka | 30 | Head | Manager | Massachusetts |
| 64 | Louise Recka | 27 | Wife | Poster | Massachusetts |
| 65 | Ruth Recka | 5 | Daughter | — | Massachusetts |
| 66 | Vincenza Locassio | 70 | Wife | 0 | Italy |
| 67 | Rosario Locassio | 67 | Head | 0 | Italy |
| 68 | Salvatore Locassio | 26 | Son | Hair Cutter Barber | Italy |
| 69 | Frank Gernert | 48 | Head | Bus Inspector | New York |
| 70 | Dorothy Gernert | 53 | Wife | 0 | New York |
| 71 | Francis Gernert | 21 | Son | New Worker | New York |
| 72 | William Plenert | 57 | Head | 0 | New York |
| 73 | Rosina Plenert | 52 | Wife | 0 | New York |
| 74 | William Callahan THIS PERSON | 25 | Head | Time Keeper | New York |
| 75 | Elizabeth Callahan | 21 | Wife | 0 | New York |
| 76 | Judith Callahan | 4 | Daughter | — | New York |
| 77 | Michelle Callahan | 2 | Daughter | — | New York |
| 78 | Helen Lambele | 48 | Mother-in-law | Clerical Work | New York |
| 79 | Jacob Campo | 46 | Head | Butcher | Italy |
| 80 | Rose Campo | 47 | Wife | 0 | Italy |
Pedigree Summary
William
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)