MC
Mary Coffey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Kings-County, New York
Our Model Tree links this Mary Coffey across the 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed) — first a daughter (b.~1911), then head of a 7-person household.
Age 29
b. ~1911
Female
Daughter
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Coffey |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (County) | Kings |
| Additional Details | |
| Occupation | 38 |
| Industry | Stenographer |
| Class of Worker | Brokerage |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | 38 |
| Township / Ward | Nyc Brooklyn |
| Est. Birth Year | ~1911 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Coffey | Daughter | — | 29 | ~1911 |
| Patrick Coffey | Son | — | 8 | ~1932 |
| Patrick Coffey | Head | — | 58 | ~1882 |
| Jeremiah Coffey | Son | — | 26 | ~1914 |
| Frances Coffey | Daughter | — | 21 | ~1919 |
| Josephine Coffey | Spouse | — | 54 | ~1886 |
| John Coffey | Son | — | 14 | ~1926 |
Census Appearances
1930
Kings, New …
Daughter, age 19
Kings, New York · implied b. ~1911 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Coffey |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | Clerk |
| Industry | Brokers |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 9500 |
| Radio Set | R |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Kings-County, New …
Daughter, age 29
Kings-County, New York · implied b. ~1911 — 7 household members
| Surname | Coffey |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (County) | Kings |
| Occupation | 38 |
| Industry | Stenographer |
| Class of Worker | Brokerage |
| Highest Grade | C 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 Mary Coffey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Coffey
Daughter · 1940 · age 29 · b. ~1911 · New York
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Sibling
John Coffey
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patrick Coffey
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jeremiah Coffey
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Coffey
Sibling · 1940 · age 21
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 — Kings-County, New York
Open full size
1940 US Federal Census — Kings-County, New York
Page Contents
33 people indexed on this census page (nara:1940:m-t0627-02571-00723)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Thomas Christensen | 14 | Son | — | New York |
| 42 | Ollef Gudnig | 54 | Head | Carpenter | Norway |
| 43 | Palma Gudnig | 50 | Wife | — | Norway |
| 44 | Erling Gudnig | 22 | Son | Clerk | Norway |
| 45 | Carl Gudnig | 20 | Son | Clerk | Norway |
| 46 | Louise Gudnig | 18 | Daughter | — | Norway |
| 47 | Clara Gudnig | 10 | Daughter | — | New York |
| 48 | Lilly Gudnig | 8 | Daughter | — | New York |
| 49 | Oscar Swanson | 47 | Head | Cook | Sweden |
| 50 | Amanda Swanson | 54 | Wife | — | Norway |
| 51 | Herbert Swanson | 22 | Son | 40 | New York |
| 52 | Dorothy Swanson | 15 | Daughter | — | New York |
| 53 | Alfred Swanson | 49 | Brother | Cook | Sweden |
| 54 | Birger Swanson | 44 | Brother-in-law | Dishwasher | Sweden |
| 55 | Mary Petrazzolo | 36 | Head | — | New York |
| 56 | Margaret Petrazzolo | 19 | Daughter | — | New York |
| 57 | Patrick Coffey | 58 | Head | Helper | Irish Free State |
| 58 | Josephine Coffey | 54 | Wife | — | Irish Free State |
| 59 | Mary Coffey THIS PERSON | 29 | Daughter | 38 | New York |
| 60 | Jeremiah Coffey | 26 | Son | 48 | New York |
| 61 | Frances Coffey | 21 | Daughter | — | New York |
| 62 | John Coffey | 14 | Son | — | New York |
| 63 | Patrick Coffey | 8 | Son | — | New York |
| 64 | Amelia Allgain | 78 | Head | — | Germany |
| 65 | Palmer Nelsen | 33 | Head | Carpenter | Norway |
| 66 | Berget Nelsen | 34 | Wife | — | Norway |
| 67 | Odd Nelsen | 6 | Son | — | New York |
| 68 | Edith Nelsen | 1 | Daughter | — | New York |
| 69 | Anna Larsen | 60 | Roomer | — | Norway |
| 70 | Hedwig Johnson | 60 | Head | — | Sweden |
| 71 | Martin Johnson | 30 | Son | 48 | New York |
| 72 | Harry Johnson | 26 | Son | 40 | New York |
| 73 | James Dunn | 36 | Head | Superintendent | Scotland |
Related Census Records
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)