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Joseph Brennan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Nassau-County, New York
Our Model Tree links this Joseph Brennan across the 1930 and 1940 US Censuses in Nassau-County, New York (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 7-person household.
Age 15
b. ~1925
Male
Son
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Nassau-County, New York |
| Surname | Brennan |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Valley Stream |
| 1935 Residence (County) | Nassau |
| Additional Details | |
| Industry | S |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Township / Ward | Valley Stream |
| Est. Birth Year | ~1925 |
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 Joseph | Age | Birth yr |
|---|---|---|---|---|
| James Brennan | Head | — | 49 | ~1891 |
| Raymond Brennan | Son | — | 9 | ~1931 |
| Mary Brennan | Daughter | — | 12 | ~1928 |
| James Brennan | Son | — | 17 | ~1923 |
| Jeffrey Brennan | Son | — | 4 | ~1936 |
| Joseph Brennan | Son | — | 15 | ~1925 |
| Catharine Brennan | Spouse | — | 40 | ~1900 |
Census Appearances
1930
Queens, New …
Son, age 4
Queens, New York · implied b. ~1926 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | Joseph F. |
| 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 |
1940
Nassau-County, New …
Son, age 15
Nassau-County, New York · implied b. ~1925 — 7 household members
| Surname | Brennan |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Valley Stream |
| 1935 Residence (County) | Nassau |
| Industry | S |
| Highest Grade | H 1 |
| 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 Joseph Brennan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Joseph Brennan
Son · 1940 · age 15 · b. ~1925 · New York
★ You are viewing this record
Sibling
Mary Brennan
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jeffrey Brennan
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Brennan
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Brennan
Sibling · 1940 · age 9
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 — 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-t0627-02687-00355)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Robert E. Willcox | 18 | Son | — | New York |
| 2 | Julius Gommi | 30 | Head | Broker Cust. | New York |
| 3 | Alice Gommi | 33 | Wife | — | New Jersey |
| 4 | Alice Carol Gommi | 3 | Daughter | — | New York |
| 5 | Julius Victor Gommi | 2 | Son | — | New York |
| 6 | Lena Verdier | 65 | Mother | — | France |
| 7 | William Schirmer | 38 | Head | Engineer Elect | New York |
| 8 | Mabel Schirmer | 36 | Wife | — | Mass |
| 9 | Robert Schirmer | 10 | Son | — | England |
| 10 | Sam Lee | 15 | — | — | New York |
| 11 | Thomas Ackermann | 36 | Head | Litographer | New York |
| 12 | Adeline Ackermann | 35 | Wife | — | New York |
| 13 | Donald Ackermann | 9 | Son | — | New York |
| 14 | Audrey Ackermann | 8 | Daughter | — | New York |
| 15 | Elizabeth Titus | 56 | Mother | — | New York |
| 16 | Alvin Washington | 36 | Head | Adjuster | New York |
| 17 | Florence Washington | 36 | Wife | — | New Jersey |
| 18 | June Washington | 18 | Daughter | — | New Jersey |
| 19 | Pierrette Washington | 16 | Daughter | — | New Jersey |
| 20 | Alvin Washington | 15 | Son | — | New York |
| 21 | Robert Washington | 12 | Son | — | New York |
| 22 | Thelma Washington | 7 | Daughter | — | New York |
| 23 | James Brennan | 49 | Head | Asst. Manager | Conn |
| 24 | Catharine Brennan | 40 | Wife | — | Mass |
| 25 | James 3Rd Brennan | 17 | Son | — | Conn |
| 26 | Joseph Brennan THIS PERSON | 15 | Son | — | New York |
| 27 | Mary Jane Brennan | 12 | Daughter | — | New York |
| 28 | Raymond Brennan | 9 | Son | — | New York |
| 29 | Jeffrey Brennan | 4 | Son | — | New York |
| 30 | Ross Aton | 47 | Head | Credit Manager | Wisconsin |
| 31 | Agnes Aton | 42 | Wife | — | Wisconsin |
| 32 | Bruce Aton | 22 | Son | Clerk | Wisconsin |
| 33 | Joan Aton | 7 | Daughter | — | Illinois |
| 34 | Caroline Dayton | 66 | Head | — | New York |
| 35 | Elizabeth Lembke | 73 | Cousin | — | New York |
| 36 | George Artkemeyer | 68 | Brother | Clerical | New York |
| 37 | Charles A. Artkemeyer | 62 | Brother | Straw Braider | New York |
| 38 | Fred H. Artkemeyer | 58 | Brother | Sign Painter | New York |
| 39 | Thomas Braddock | 52 | Head | Architect | New York |
| 40 | Emma Braddock | 50 | Wife | — | 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)