JD
John Duggan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Kings-County, New York
Our Model Tree links this John Duggan across the 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed) — first a son (b.~1917), then head of a 7-person household.
Age 23
b. ~1917
Male
Son
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Duggan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | NYC |
| 1935 Residence (County) | Kings |
| Additional Details | |
| Occupation | Waiter |
| Industry | Saloon |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Waiter |
| Township / Ward | Nyc |
| Est. Birth Year | ~1917 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Alice Duggan | Daughter | — | 20 | ~1920 |
| James Duggan | Son | — | 24 | ~1916 |
| Joseph Duggan | Head | — | 40 | ~1900 |
| Helen Duggan | Daughter | — | 22 | ~1918 |
| John Duggan | Son | — | 23 | ~1917 |
| Alice Duggan | Spouse | — | 35 | ~1905 |
| Catherine Duggan | Daughter | — | 18 | ~1922 |
Census Appearances
1930
Kings, New …
Son, age 13
Kings, New York · implied b. ~1917 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dugan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Kings-County, New …
Son, age 23
Kings-County, New York · implied b. ~1917 — 7 household members
| Surname | Duggan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | NYC |
| 1935 Residence (County) | Kings |
| Occupation | Waiter |
| Industry | Saloon |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| Highest Grade | Hs 2 |
| 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 John Duggan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Duggan
Son · 1940 · age 23 · b. ~1917 · New York
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Sibling
Helen Duggan
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Duggan
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Duggan
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Duggan
Sibling · 1940 · age 24
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
40 people indexed on this census page (nara:1940:m-t0627-02569-00407)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Augusta Curry | 53 | Head | Retired | New York |
| 2 | Catherine Curry | 50 | Wife | Housework | New York |
| 3 | John Curry | 27 | Son | Coal Handler | New York |
| 4 | Joseph Curry | 25 | Son | None | New York |
| 5 | Mary Curry | 23 | Daughter | None | New York |
| 6 | Catherine E. Curry | 19 | Daughter | None | New York |
| 7 | William Curry | 17 | Son | None | New York |
| 8 | Patrick Curry | 13 | Son | — | New York |
| 9 | Mary Fennell | 33 | Head | Housework | New York |
| 10 | Mary A. Fennell | 12 | Daughter | — | New York |
| 11 | Margaret Fennell | 10 | Daughter | — | New York |
| 12 | John Fennell | 8 | Son | — | New York |
| 13 | Helen Fennell | 6 | Daughter | — | New York |
| 14 | John Fennell | 40 | Husband | — | New York |
| 15 | Joseph Fennell | 3 | Son | — | New York |
| 16 | Robert Fennell | 2 | Son | — | New York |
| 17 | Richard Fennell | 1 | Son | — | New York |
| 18 | Michael Gallagher | 40 | Head | Elevator Operator | Ireland |
| 19 | Sarah Gallagher | 38 | Wife | Housework | Ireland |
| 20 | Nora Gallagher | 13 | Daughter | — | New York |
| 21 | James Gallagher | 11 | Son | — | New York |
| 22 | Mary Gallagher | 6 | Daughter | — | New York |
| 23 | Patrick Gallagher | 40 | Brother | Laborer | Ireland |
| 24 | Patrick Gildea | 38 | Head | Motorman | Ireland |
| 25 | Catherine Gildea | 34 | Wife | Housework | Ireland |
| 26 | Michael Gildea | 21 | Son | New Worker | New York |
| 27 | Nora Gildea | 19 | Daughter | New Worker | New York |
| 28 | John Gildea | 17 | Son | New Worker | New York |
| 29 | Patrick Gallagher | 49 | Brother-in-law | Attendant | Ireland |
| 30 | Mary Mcgovern | 64 | Head | Housework | New York |
| 31 | James Mcgovern | 39 | Son | Clerk | New York |
| 32 | Joseph Duggan | 40 | Head | Liquor Retail Store | Ireland |
| 33 | Alice Duggan | 35 | Wife | Housework | Ireland |
| 34 | James Duggan | 24 | Son | Customer | New York |
| 35 | John Duggan THIS PERSON | 23 | Son | Waiter | New York |
| 36 | Alice Duggan | 20 | Daughter | New Worker | New York |
| 37 | Helen Duggan | 22 | Daughter | Secretary | New York |
| 38 | Catherine Duggan | 18 | Daughter | New Worker | New York |
| 39 | William Boyle | 30 | Head | Meter Reader | New York |
| 40 | Gertrude Boyle | 30 | Wife | Housework | New York |
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)