WM
William Mahoney — 1940 US Census Record
Model Tree available1940 United States Federal Census · Kings-County, New York
Our Model Tree links this William Mahoney across the 1920, 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed), with identified parents Otto & Violette — first a head (b.~1912), then head of a 4-person household.
Age 28
b. ~1912
Male
Head
Born: New York
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Mahoney |
| Given Name | William G. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Additional Details | |
| Occupation | Night Supervisor |
| Industry | Parcel Service Corp. |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 2400 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Night Supervisor |
| Township / Ward | New York 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| John Mahoney | Son | — | 6 | ~1934 |
| Joan Mahoney | Daughter | — | 5 | ~1935 |
| Jean Mahoney | Spouse | — | 26 | ~1914 |
| William Mahoney | Head | — | 28 | ~1912 |
Census Appearances
1920
Kings, New …
Son, age 6
Kings, New York · implied b. ~1914 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
Kings, New …
Son, age 18
Kings, New York · implied b. ~1912 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | William J. |
| 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 | Stenographer |
| Industry | Typewriter Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Kings-County, New …
Head, age 28
Kings-County, New York · implied b. ~1912 — 4 household members
| Surname | Mahoney |
| Given Name | William G. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Occupation | Night Supervisor |
| Industry | Parcel Service Corp. |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 2400 |
| Highest Grade | No 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 Mahoney across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Otto Mahoney (~0.92 confidence) and mother Violette Mahoney (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Otto Mahoney
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Violette Mahoney
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Mahoney
Head · 1940 · age 28 · b. ~1912 · 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-t0627-02568-00993)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank Mollica | 58 | Head | Laborer | Italy |
| 2 | Domenica Mollica | 55 | Wife | — | Italy |
| 3 | Mary Mollica | 21 | Daughter | Finisher | New York |
| 4 | Benjamin Mollica | 19 | Son | New Worker | New York |
| 5 | Rosalie Mollica | 17 | Daughter | New Worker | New York |
| 6 | Catherine Mollica | 4 | Daughter | — | New York |
| 7 | Salvatore D'Angelo | 52 | Head | Laborer | Italy |
| 8 | Josephine D'Angelo | 46 | Wife | — | Italy |
| 9 | Anthony D'Angelo | 19 | Son | New Worker | New York |
| 10 | Catherine D'Angelo | 17 | Daughter | — | New York |
| 11 | Rosalie D'Angelo | 15 | Daughter | — | New York |
| 12 | Joseph D'Angelo | 13 | Son | — | New York |
| 13 | Mary Marzino | 57 | Head | — | Italy |
| 14 | Francis Marzino | 35 | Son | Plumber | New York |
| 15 | Anthony Marzino | 26 | Son | Packer | New York |
| 16 | Peter Marzino | 24 | Son | Packer | New York |
| 17 | Catherine Marzino | 21 | Daughter | Packer | New York |
| 18 | Elizabeth Walsh | 69 | Head | — | New York |
| 19 | Matthew Walsh | 36 | Son | Instructor | New York |
| 20 | Elizabeth Walsh | 34 | Daughter | Teacher | New York |
| 21 | Joseph Walsh | 31 | Son | Typist | New York |
| 22 | Ellen Muldoon | 61 | Head | — | Eire |
| 23 | Anastasia Carney | 53 | Head | — | New York |
| 24 | James Carney | 26 | Son | Clerk | New York |
| 25 | Joseph Carney | 24 | Son | Clerk | New York |
| 26 | Mary Carney | 20 | Daughter | Typist | New York |
| 27 | John Carney | 17 | Son | — | New York |
| 28 | Theresa Carney | 15 | Daughter | — | New York |
| 29 | Mary Woods | 80 | Mother | — | Eire |
| 30 | Edward F. Hubbard | 49 | Head | Superintendent | New York |
| 31 | Ann Hubbard | 25 | Daughter | Telephone Operator | New York |
| 32 | Edward Hubbard | 20 | Son | Messenger | New York |
| 33 | Arthur Hubbard | 18 | Son | Messenger | New York |
| 34 | John Hubbard | 16 | Son | — | New York |
| 35 | Marie Hubbard | 15 | Daughter | — | New York |
| 36 | William G. Mahoney THIS PERSON | 28 | Head | Night Supervisor | New York |
| 37 | Jean Mahoney | 26 | Wife | — | New York |
| 38 | John Mahoney | 6 | Son | — | New York |
| 39 | Joan Mahoney | 5 | Daughter | — | New York |
| 40 | William Novotack | 34 | Head | Machinist | Germany |
Pedigree Summary
William
Gen 1 · 2 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)