MK
Mary Kelly — 1940 US Census Record
Model Tree available1940 United States Federal Census · Kings-County, New York
Our Model Tree links this Mary Kelly across the 1920, 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed), with identified parents Marguerite & James — first a head (b.~1904), then head of a 2-person household.
Age 36
b. ~1904
Female
Head
Born: Brooklyn
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Kelly |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Widowed |
| Birthplace | Brooklyn |
| 1935 Residence (City) | Brooklyn |
| 1935 Residence (County) | Kings |
| Additional Details | |
| Occupation | Secretary |
| Industry | Amer Can Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 900 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birthplace (normalized) | brooklyn |
| Occupation | Secretary |
| Township / Ward | Brooklyn |
| Est. Birth Year | ~1904 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Kelly | Head | — | 36 | ~1904 |
| John Kelly | Son | — | 2 | ~1938 |
Census Appearances
1920
Kings, New …
Daughter, age 15
Kings, New York · implied b. ~1905 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kelly |
| Given Name | Maggie |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Brooklyn |
| Father's Birthplace | Brooklyn |
| Mother's Birthplace | New York |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birthplace (normalized) | brooklyn |
1930
Kings, New …
Daughter, age 25
Kings, New York · implied b. ~1905 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kealy |
| Given Name | Marguerite |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Brooklyn |
| Father's Birthplace | Brooklyn |
| Mother's Birthplace | New York |
| Occupation | Supervisor |
| Industry | Telephone Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birthplace (normalized) | brooklyn |
1940
Kings-County, New …
Head, age 36
Kings-County, New York · implied b. ~1904 — 2 household members
| Surname | Kelly |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Widowed |
| Birthplace | Brooklyn |
| 1935 Residence (City) | Brooklyn |
| 1935 Residence (County) | Kings |
| Occupation | Secretary |
| Industry | Amer Can Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 900 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birthplace (normalized) | brooklyn |
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 Mary Kelly across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Marguerite Kealy (~0.92 confidence) and father James Kelly (~0.92 confidence) and mother Caroline Kelly (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Marguerite Kealy
b. ~1877
Source mother
● Household
· direct · ~0.92
Father
James Kelly
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Caroline Kelly
b. ~1881
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Kelly
Head · 1940 · age 36 · b. ~1904 · 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-t0627-02611-00455)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Catherine Walsh | 13 | daughter | — | New York |
| 2 | James Walsh | 11 | son | — | New York |
| 3 | John Walsh | 10 | son | — | New York |
| 4 | William Canterbury | 35 | Head | Painter | Ireland |
| 5 | Mary Canterbury | 32 | Wife | — | Ireland |
| 6 | Joseph Vigliante | 54 | Head | Barber | Italy |
| 7 | Lena Vigliante | 36 | Wife | — | Italy |
| 8 | Vincent Vigliante | 19 | son | — | Italy |
| 9 | Florence Vigliante | 15 | daughter | — | Brooklyn |
| 10 | Theresa Vigliante | 14 | daughter | — | Brooklyn |
| 11 | Vincent Dachelle | 41 | Head | Tailor | Italy |
| 12 | Lee Dachelle | 38 | Wife | — | Italy |
| 13 | Frank Dachelle | 16 | son | — | Brooklyn |
| 14 | Vito Dachelle | 14 | son | — | Brooklyn |
| 15 | Anthony Dachelle | 4 | son | — | Brooklyn |
| 16 | Mike Saccoccio | 46 | Head | Shoe Store | Italy |
| 17 | Frances Saccoccio | 40 | Wife | — | Italy |
| 18 | Paul Saccoccio | 17 | son | — | Italy |
| 19 | Rose Saccoccio | 12 | daughter | — | Brooklyn |
| 20 | Edward Saccoccio | 8 | son | — | Brooklyn |
| 21 | Richard Saccoccio | 6 | son | — | Brooklyn |
| 22 | Mary Kelly THIS PERSON | 36 | Head | Secretary | Brooklyn |
| 23 | John Kelly | 2 | son | — | Brooklyn |
| 24 | George Hill | 42 | Head | Switchman | Brooklyn |
| 25 | Helen Hill | 31 | Wife | — | Brooklyn |
| 26 | John Hill | 10 | son | — | Brooklyn |
| 27 | William Hill | 6 | son | — | Brooklyn |
| 28 | Thomas King | 35 | Head | Chauffeur | Brooklyn |
| 29 | Sarah King | 31 | Wife | — | Brooklyn |
| 30 | Marie King | 10 | daughter | — | Brooklyn |
| 31 | Thomas King | 6 | son | — | Brooklyn |
| 32 | Eleanor King | 3 | daughter | — | Brooklyn |
| 33 | John Borthwick | 34 | Head | Clerk | Brooklyn |
| 34 | May Borthwick | 29 | Wife | — | Brooklyn |
| 35 | Muriel Borthwick | 9 | daughter | — | Brooklyn |
| 36 | Eileen Borthwick | 4 | daughter | — | Brooklyn |
| 37 | Francis Mcsweeney | 65 | Head | — | Brooklyn |
| 38 | Helen Mcsweeney | 28 | daughter | Attendant | Brooklyn |
| 39 | Frances Mcsweeney | 4 | daughter | — | Brooklyn |
| 40 | Edward Mcsweeney | 3 | son | — | Brooklyn |
Pedigree Summary
Mary
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)