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Margaret Brennan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Bronx-County, New York
Our Model Tree links this Margaret Brennan across the 1920, 1930 and 1940 US Censuses in Bronx-County, New York (XGBoost, ~Confirmed), with identified parents Lucia & John — first a daughter (b.~1916), then head of a 5-person household.
Age 24
b. ~1916
Female
Daughter
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Bronx-County, New York |
| Surname | Brennan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Bronx |
| Additional Details | |
| Occupation | Clerical |
| Industry | City |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 1320 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Clerical |
| Township / Ward | New York City |
| Est. Birth Year | ~1916 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Margaret Brennan | Daughter | — | 24 | ~1916 |
| Katherine Daffney | Other | — | 47 | ~1893 |
| James Brennan | Head | — | 50 | ~1890 |
| Rita Brennan | Daughter | — | 23 | ~1917 |
| Sarah Brennan | Daughter | — | 19 | ~1921 |
Census Appearances
1920
Bronx, New …
Daughter, age 4
Bronx, New York · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
Bronx, New …
Daughter, age 15
Bronx, New York · implied b. ~1915 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Bronx-County, New …
Daughter, age 24
Bronx-County, New York · implied b. ~1916 — 5 household members
| Surname | Brennan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Bronx |
| Occupation | Clerical |
| Industry | City |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 1320 |
| Highest Grade | Hs 4 |
| 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 Margaret Brennan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Lucia Humphrey (~0.92 confidence) and father John Brennan (~0.92 confidence) and mother Delia Brennan (~0.92 confidence) and father James Brennan (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Lucia Humphrey
b. ~1876
Source mother
● Household
· direct · ~0.92
Father
John Brennan
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Delia Brennan
b. ~1882
Source mother
● Household
· direct · ~0.92
Father
James Brennan
b. ~1890
Source father
● Household
· direct · ~0.92
This person
Anchor record
Margaret Brennan
Daughter · 1940 · age 24 · b. ~1916 · New York
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Sibling
Sarah Brennan
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rita Brennan
Sibling · 1940 · age 23
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 — Bronx-County, New York
Open full size
1940 US Federal Census — Bronx-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02492-00469)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Benjamin Grill | 36 | Head | Clerk | New York |
| 42 | Tillie Grill | 36 | Wife | Housewife | New York |
| 43 | Conrad P. Grill | 5 | Son | — | New York |
| 44 | Paul Fred Grill | 3 | Son | — | New York |
| 45 | Eliaku Lelehman | 43 | Head | Rabbi | Palestine |
| 46 | Rachael Lelehman | 38 | Wife | Housewife | Poland |
| 47 | Leonora Lelehman | 6 | Daughter | — | New Jersey |
| 48 | Herbert Lelehman | 2 | Son | — | New Jersey |
| 49 | Thomas Ackerson | 35 | Head | Patrolman | New York |
| 50 | Fay Ackerson | 36 | Wife | Packer | New York |
| 51 | Thomas Ackerson | 15 | Son | Student | New York |
| 52 | Vivian Ackerson | 13 | Daughter | — | New York |
| 53 | Gustave Roseng | 43 | Head | Bus Conductor | New York |
| 54 | Florence Roseng | 46 | Wife | Housewife | New York |
| 55 | Jacob Witlen | 46 | Head | Clerk | Poland |
| 56 | Jean Witlen | 46 | Wife | Housewife | Russia |
| 57 | Evan Witlen | 11 | Son | — | New York |
| 58 | Maynard Strambridge | 50 | Head | Iceman | New York |
| 59 | Laura Strambridge | 49 | Wife | Housewife | New York |
| 60 | Laura Strambridge | 28 | Daughter | Operator | New York |
| 61 | Maynard Strambridge | 26 | Son | Iceman | New York |
| 62 | Dorothy K. Strambridge | 23 | Daughter | File Clerk | New York |
| 63 | Edwin Strambridge | 19 | Son | Student | New York |
| 64 | Florence Strambridge | 15 | Daughter | Student | New York |
| 65 | Howard Strambridge | 20 | Son | Stock Clerk | New York |
| 66 | Robert Strambridge | 11 | Son | — | New York |
| 67 | Leo Pepin | 31 | Head | Clerk | Mass. |
| 68 | Evelyn Pepin | 30 | Wife | Housewife | Mass. |
| 69 | Leo Pepin | 5 | Son | — | New York |
| 70 | James Brennan | 50 | Head | Housewife | New York |
| 71 | Rita Brennan | 23 | Daughter | Teacher | New York |
| 72 | Margaret Brennan THIS PERSON | 24 | Daughter | Clerical | New York |
| 73 | Sarah Brennan | 19 | Daughter | Clerical | New York |
| 74 | Katherine Daffney | 47 | Sister | Saleslady | New York |
| 75 | John Belmuth | 41 | Head | Agent | New York |
| 76 | Catherine Belmuth | 42 | Wife | Housewife | New York |
| 77 | Margaret Belmuth | 17 | Daughter | Student | New York |
| 78 | Joseph Belmuth | 13 | Son | — | New York |
| 79 | Walter Svoska | 34 | Head | Reg. Clerk | New York |
| 80 | Helga Svoska | 32 | Wife | Housewife | New York |
Pedigree Summary
Margaret + 2 siblings
Gen 1 · 4 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)