JB
James Brennan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Nassau-County, New York
Our Model Tree links this James Brennan across the 1930 and 1940 US Censuses in Nassau-County, New York (XGBoost, ~Confirmed) — first a head (b.~1897), then head of a 9-person household.
Age 43
b. ~1897
Male
Head
Born: Irish Free State
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Nassau-County, New York |
| Surname | Brennan |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | Baldwin |
| 1935 Residence (County) | Nassau |
| Naturalization Status | Naturalized |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | 6 |
| 1935 Residence | Same place |
| Birthplace (normalized) | irish free state |
| Township / Ward | Baldwin |
| Est. Birth Year | ~1897 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Ellen Brennan | Daughter | — | 14 | ~1926 |
| Ann Brennan | Daughter | — | 7 | ~1933 |
| Rosemarie Brennan | Daughter | — | 1 | ~1939 |
| Mary Brennan | Daughter | — | 9 | ~1931 |
| James Brennan | Head | — | 43 | ~1897 |
| Martin Brennan | Son | — | 8 | ~1932 |
| Joseph Brennan | Son | — | 4 | ~1936 |
| James Brennan | Son | — | 11 | ~1929 |
| Rose Brennan | Spouse | — | 37 | ~1903 |
Census Appearances
1930
Queens, New …
Head, age 33
Queens, New York · implied b. ~1897 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| Age at First Marriage | 30 |
| Father's Birthplace | Pennsylvania |
| Occupation | Laborer |
| Industry | Building Constr |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 57 |
| Radio Set | R |
| Birthplace (normalized) | irish free state |
1940
Nassau-County, New …
Head, age 43
Nassau-County, New York · implied b. ~1897 — 9 household members
| Surname | Brennan |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | Baldwin |
| 1935 Residence (County) | Nassau |
| Naturalization Status | Naturalized |
| Income (1939) | 0 |
| Highest Grade | 6 |
| 1935 Residence | Same place |
| Birthplace (normalized) | irish free state |
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 James Brennan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
James Brennan
Head · 1940 · age 43 · b. ~1897 · New York
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Nassau-County, New York
Open full size
1940 US Federal Census — Nassau-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02688-00870)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Francis J (Rev) Burns | 43 | Lodger | Priest | New York |
| 2 | Eileen Courtney | 45 | Servant | Servant | Irish Free State |
| 3 | Cecila Pogan | 41 | Lodger | Servant | Scotland |
| 4 | Walter Davis | 30 | Head | Lawyer | New York |
| 5 | Estelle Davis | 25 | Wife | — | New York |
| 6 | Carl S. Davis | 3 | Son | — | New York |
| 7 | Nathan Van Dine | 38 | Head | Chauffeur | New York |
| 8 | Lillian Van Dine | 34 | Wife | — | So. Carolina |
| 9 | Lina Fenster | 52 | Head | — | Switzerland |
| 10 | Lloyd Fenster | 25 | Son | Underwriter | New York |
| 11 | Eugene Bender | 58 | Head | Owner | Germany |
| 12 | Marie Bender | 52 | Wife | — | Germany |
| 13 | Elvira Bender | 20 | Daughter | Bookkeeper | New York |
| 14 | Ruth Bender | 16 | Daughter | — | New York |
| 15 | Charles Harris | 50 | Head | Owner | New York |
| 16 | Anna Harris | 43 | Wife | — | New York |
| 17 | James Brennan THIS PERSON | 43 | Head | — | Irish Free State |
| 18 | Rose Brennan | 37 | Wife | — | New York |
| 19 | Ellen Brennan | 14 | Daughter | — | New York |
| 20 | James Jr Brennan | 11 | Son | — | New York |
| 21 | Mary Brennan | 9 | Daughter | — | New York |
| 22 | Martin Brennan | 8 | Son | — | New York |
| 23 | Ann Brennan | 7 | Daughter | — | New York |
| 24 | Joseph Brennan | 4 | Son | — | New York |
| 25 | Rosemarie Brennan | 1 | Daughter | — | New York |
| 26 | Fred Loth | 52 | Head | Baker | Germany |
| 27 | Herbert Loth | 20 | Son | — | Germany |
| 28 | Urho Nekton | 47 | Head | — | Finland |
| 29 | Irene Nekton | 43 | Wife | — | Finland |
| 30 | Arans Nekton | 12 | Son | — | New York |
| 31 | Laura Nekton | 10 | Daughter | — | New York |
| 32 | Herman Rubkemen | 54 | Head | Owner | Germany |
| 33 | Meta Rubkemen | 46 | Wife | — | Germany |
| 34 | Herman Jr Rubkemen | 28 | Son | — | New York |
| 35 | Walter Rubkemen | 18 | Son | — | New York |
| 36 | Anthony Dalmont | 48 | Head | Owner | Italy |
| 37 | Mary Dalmont | 42 | Wife | — | Italy |
| 38 | Stella Dalmont | 24 | Daughter | Buyer | New York |
| 39 | Joseph Dalmont | 21 | Son | Bar-Tender | New York |
| 40 | Anna Dalmont | 18 | Daughter | — | New York |
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)