WM
William Mahoney — 1940 US Census Record
Model Tree available1940 United States Federal Census · New-York-County, New York
Our Model Tree links this William Mahoney across the 1920, 1930 and 1940 US Censuses in New-York-County, New York (XGBoost, ~Confirmed), with identified parents William & Cornelius — first a son (b.~1915), then head of a 5-person household.
Age 25
b. ~1915
Male
Son
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | New-York-County, New York |
| Surname | Mahoney |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | New York |
| Additional Details | |
| Occupation | Elevator Operator |
| Industry | Loft Bldg. |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1050 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Elevator Operator |
| Township / Ward | New York City |
| 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 |
|---|---|---|---|---|
| Thomas Mahoney | Son | — | 10 | ~1930 |
| Robert Mahoney | Son | — | 11 | ~1929 |
| Francis Mahoney | Son | — | 13 | ~1927 |
| William Mahoney | Son | — | 25 | ~1915 |
| Catherine Mahoney | Head | — | 45 | ~1895 |
Census Appearances
1920
New York, …
Son, age 4
New York, New York · implied b. ~1916 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
New York, …
Son, age 14
New York, New York · implied b. ~1916 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | School |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
New-York-County, New …
Son, age 25
New-York-County, New York · implied b. ~1915 — 5 household members
| Surname | Mahoney |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | New York |
| Occupation | Elevator Operator |
| Industry | Loft Bldg. |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1050 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| 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 William Mahoney (~0.92 confidence) and father Cornelius Mahoney (~0.92 confidence) and mother Catherine Mahoney (~0.92 confidence) and mother Catherine Mahoney (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Mahoney
b. ~1884
Source father
● Household
· direct · ~0.92
Father
Cornelius Mahoney
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Catherine Mahoney
b. ~1891
Source mother
● Household
· direct · ~0.92
Mother
Catherine Mahoney
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Mahoney
Son · 1940 · age 25 · b. ~1915 · New York
★ You are viewing this record
Sibling
Francis Mahoney
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Mahoney
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mahoney
Sibling · 1940 · age 11
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 — New-York-County, New York
Open full size
1940 US Federal Census — New-York-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02629-00344)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Louise Gerna | 62 | Head | — | Italy |
| 2 | James S. Spain | 49 | Head | Skilled Laborer | New York |
| 3 | Elizabeth Spain | 48 | Wife | — | New York |
| 4 | Joseph A. Budevick | 43 | Head | Pressman | New York |
| 5 | Josephine Budevick | 38 | Wife | — | New York |
| 6 | Joseph Budevick | 8 | Son | — | New York |
| 7 | Gottlieb Thiel | 69 | Head | Butcher | Germany |
| 8 | Margaret Thiel | 56 | Wife | — | New York |
| 9 | Robert A. White | 32 | Head | — | New York |
| 10 | Holdon White | 3 | Son | — | New York |
| 11 | Haparch|Haparch Berry | 75 | Head | Supervisor | Austria |
| 12 | Hannah Berry | 53 | Daughter | Packer | New York |
| 13 | Anna Berry | 43 | Daughter | Operator | New York |
| 14 | Thomas Nevery | 48 | Head | Laborer | New York |
| 15 | Catherine Nevery | 47 | Wife | — | New York |
| 16 | Peter Nevery | 21 | Son | Utility Man | New York |
| 17 | John Nevery | 15 | Son | — | New York |
| 18 | Frances Reckfort | 45 | Head | — | New York |
| 19 | Catherine Mahoney | 45 | Head | — | New York |
| 20 | William Mahoney THIS PERSON | 25 | Son | Elevator Operator | New York |
| 21 | Robert Mahoney | 11 | Son | Delivery Boy | New York |
| 22 | Francis Mahoney | 13 | Son | — | New York |
| 23 | Thomas Mahoney | 10 | Son | — | New York |
| 24 | Elizabeth Uprey | 50 | Head | — | New York |
| 25 | Charles Uprey | 23 | Son | Stock Clerk | New York |
| 26 | James Uprey | 21 | Son | Helper | New York |
| 27 | Raymond Uprey | 19 | Son | New Worker | New York |
| 28 | John Uprey | 17 | Son | New Worker | New York |
| 29 | Loretta Uprey | 14 | Daughter | — | New York |
| 30 | Joseph Uprey | 11 | Son | — | New York |
| 31 | Florence Uprey | 5 | Daughter | — | New York |
| 32 | Richard O'Connell | 26 | Head | Stevedore | New York |
| 33 | Patrick O'Connell | 25 | Brother | Clerk | New York |
| 34 | Andrew Hoffman | 50 | Head | Smoker Of Meats | New York |
| 35 | Anna Hoffman | 41 | Wife | — | New York |
| 36 | Andrew Hoffman | 20 | Son | Cashier | New York |
| 37 | Veronica Hoffman | 18 | Daughter | New Worker | New York |
| 38 | Benjamin Mcgrath | 39 | Head | Chauffeur | New York |
| 39 | Mary Wilson | 43 | In law | — | New York |
| 40 | Catherine Wilson | 10 | niece | — | New York |
Pedigree Summary
William + 3 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)