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Margaret Brennan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Union-County, New Jersey
Our Model Tree links this Margaret Brennan across the 1920, 1930 and 1940 US Censuses in Union-County, New Jersey (XGBoost, ~Confirmed), with identified parents Nora & Martin — first a daughter (b.~1898), then head of a 9-person household.
Age 42
b. ~1898
Female
Daughter
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Union-County, New Jersey |
| Surname | Brennan |
| Given Name | Margaret |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Elizabeth City |
| 1935 Residence (County) | Union |
| Additional Details | |
| Occupation | saleslady |
| Industry | stationery retail |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 780 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Saleslady |
| Township / Ward | Elizabeth City |
| Est. Birth Year | ~1898 |
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 Margaret | Age | Birth yr |
|---|---|---|---|---|
| Mary Brennan | Daughter | — | 41 | ~1899 |
| Margaret Brennan | Daughter | — | 42 | ~1898 |
| Helen Kiernan | Daughter | — | 35 | ~1905 |
| Martin Brennan | Head | — | 69 | ~1871 |
| Thomas Kiernan | Other | — | 37 | ~1903 |
| Doris Holmes | Other | — | 7 | ~1933 |
| Nora Brennan | Spouse | — | 70 | ~1870 |
| Anna Holmes | Daughter | — | 34 | ~1906 |
| John Brennan | Son | — | 40 | ~1900 |
Census Appearances
1920
Union, New …
Daughter, age 22
Union, New Jersey · implied b. ~1898 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Saleslady |
| Industry | Store |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Union, New …
Daughter, age 33
Union, New Jersey · implied b. ~1897 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Stenographer |
| Industry | Railroad Office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Union-County, New …
Daughter, age 42
Union-County, New Jersey · implied b. ~1898 — 9 household members
| Surname | Brennan |
| Given Name | Margaret |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Elizabeth City |
| 1935 Residence (County) | Union |
| Occupation | saleslady |
| Industry | stationery retail |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 780 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 Nora Brennan (~0.92 confidence) and father Martin Brennan (~0.92 confidence) and father Martin Brennan (~0.92 confidence) and mother Nora Brennan (~0.92 confidence) and mother Jane Brennan (~0.92 confidence) and father Martin Brennan (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Nora Brennan
b. ~1870
Source mother
● Household
· direct · ~0.92
Father
Martin Brennan
b. ~1871
Source father
● Household
· direct · ~0.92
Father
Martin Brennan
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Nora Brennan
b. ~1871
Source mother
● Household
· direct · ~0.92
Mother
Jane Brennan
b. ~1872
Source mother
● Household
· direct · ~0.92
Father
Martin Brennan
b. ~1875
Source father
● Household
· direct · ~0.92
This person
Anchor record
Margaret Brennan
Daughter · 1940 · age 42 · b. ~1898 · New Jersey
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Sibling
Helen Kiernan
Sibling · 1940 · age 35
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Holmes
Sibling · 1940 · age 34
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Brennan
Sibling · 1940 · age 40
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Brennan
Sibling · 1940 · age 41
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 — Union-County, New Jersey
Open full size
1940 US Federal Census — Union-County, New Jersey
Page Contents
34 people indexed on this census page (nara:1940:m-t0627-02400-00465)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Marion Higgins | 11 | daughter | — | New Jersey |
| 42 | Delphine Willette | 29 | maid | Maid | New York |
| 43 | Martin Brennan | 69 | head | — | Eire |
| 44 | Nora Brennan | 70 | wife | — | Eire |
| 45 | Margaret Brennan THIS PERSON | 42 | daughter | Saleslady | New Jersey |
| 46 | Mary Brennan | 41 | daughter | Stenographer | New Jersey |
| 47 | John Brennan | 40 | son | Watchman | New Jersey |
| 48 | Thomas Kiernan | 37 | son-in-law | Patrolman | New Jersey |
| 49 | Helen Kiernan | 35 | daughter | — | New Jersey |
| 50 | Anna Holmes | 34 | daughter | Typist | New Jersey |
| 51 | Doris Holmes | 7 | granddaughter | — | New Jersey |
| 52 | Louise Gibbons | 46 | head | — | New Jersey |
| 53 | Edna Starr | 23 | daughter | Baker | New Jersey |
| 54 | Joan Starr | 4 | granddaughter | — | New Jersey |
| 55 | Luther Gibbons | 25 | son | Sheet Metal Worker | New Jersey |
| 56 | Lillian Gibbons | 23 | daughter-in-law | — | New Jersey |
| 57 | Richard Gibbons | 2 | grandson | — | New Jersey |
| 58 | Thomas Gibbons | 0 | grandson | — | New Jersey |
| 59 | Clarence Adkins | 52 | brother-in-law | — | Maryland |
| 60 | Cassie Adkins | 47 | sister-in-law | Seamstress | Maryland |
| 61 | Neva Gano | 22 | niece | Machine Operator | New Jersey |
| 62 | Clyde Peer | 37 | head | — | New Jersey |
| 63 | Madeline Peer | 34 | wife | — | New Jersey |
| 64 | Madeline Peer | 16 | daughter | — | New Jersey |
| 65 | Charles J. Bennett | 58 | uncle | Desk Clerk | Norway |
| 66 | Charles Booth | 50 | head | Bricklayer + Plasterer | New Jersey |
| 67 | Jack Booth | 8 | son | — | New Jersey |
| 68 | Hazel Kaufmann | 28 | head | — | New Jersey |
| 69 | Lewis Kaufmann | 5 | son | — | New York |
| 70 | Charles Schmidt | 29 | head | Handyman | New Jersey |
| 71 | William Schmidt | 25 | brother | Laborer | New Jersey |
| 72 | Ernest Labonte | 38 | head | Machinist | Massachusetts |
| 73 | Ula Labonte | 35 | wife | — | Kentucky |
| 74 | William Labonte | 10 | son | — | Washington |
Pedigree Summary
Margaret + 4 siblings
Gen 1 · 6 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)