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Mary Brennan — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Essex, New Jersey
Our Model Tree links this Mary Brennan across the 1920 and 1930 US Censuses in Essex, New Jersey (XGBoost, ~Confirmed) — first a daughter (b.~1913), then head of a 11-person household.
Age 17
b. ~1913
Female
Daughter
Born: New Jersey
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Essex, New Jersey |
| Surname | Brennan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New York |
| Additional Details | |
| Occupation | Clerk |
| Industry | Office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Clerk |
| Township / Ward | Orange City |
| Est. Birth Year | ~1913 |
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.
11 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Barbara Brennan | Daughter | — | 13 | ~1917 |
| Cecelia Brennan | Daughter | — | 22 | ~1908 |
| Mary Brennan | Daughter | — | 17 | ~1913 |
| Winifred Brennan | Daughter | — | 14 | ~1916 |
| Margaret Brennan | Daughter | — | 23 | ~1907 |
| Patrick Brennan | Head | — | 56 | ~1874 |
| Nora Brennan | Other | — | 54 | ~1876 |
| James Brennan | Son | — | 9 | ~1921 |
| Robert Brennan | Son | — | 19 | ~1911 |
| Joseph Brennan | Son | — | 26 | ~1904 |
| Thomas Brennan | Son | — | 20 | ~1910 |
Census Appearances
1920
Essex, New …
Daughter, age 7
Essex, New Jersey · implied b. ~1913 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New York |
| Occupation | Scholar |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Essex, New …
Daughter, age 17
Essex, New Jersey · implied b. ~1913 — 11 household members
| Surname | Brennan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New York |
| Occupation | Clerk |
| Industry | Office |
| Class of Worker | W |
| Can Read/Write | Yes |
| 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 Mary Brennan across 2 US Census years (1920 and 1930) in Essex, New Jersey, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Brennan
Daughter · 1930 · age 17 · b. ~1913 · New Jersey
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Sibling
Margaret Brennan
Sibling · 1930 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Brennan
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Brennan
Sibling · 1930 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cecelia Brennan
Sibling · 1930 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Brennan
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Winifred Brennan
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Barbara Brennan
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Brennan
Sibling · 1930 · age 19
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
1930 US Federal Census — Essex, New Jersey
Open full size
1930 US Federal Census — Essex, New Jersey
Page Contents
50 people indexed on this census page (ia:1930:newjerseycensus00reel1343:0536)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James Benn | 40 | Head | Glassmelter | New Jersey |
| 2 | Katie Benn | 40 | Wife-H | — | New Jersey |
| 3 | Mildred Benn | 19 | Daughter | Bookkeeper | New Jersey |
| 4 | Ruth Benn | 17 | Daughter | Bookkeeper | New Jersey |
| 5 | James E. Caen | 34 | Head | Assembler | New Jersey |
| 6 | Sylvia Caen | 31 | Wife-H | — | New Jersey |
| 7 | Ruth M. Caen | 6 | Daughter | — | New Jersey |
| 8 | Marilyn Caen | 5 | Daughter | — | New Jersey |
| 9 | Ruth Westrick | 28 | Sister-in-law | Operator | New Jersey |
| 10 | Mary Dillon | 60 | Head | — | Ireland |
| 11 | Julia Drury | 38 | Daughter | Laborer | New Jersey |
| 12 | James Drury | 35 | Nephew | Machinist | New Jersey |
| 13 | Stanley Smolenski | 41 | Head | Florist | Poland |
| 14 | Katherine Smolenski | 33 | Wife-H | — | Austria |
| 15 | Lynell Smolenski | 22 | Daughter | Bookkeeper | New Jersey |
| 16 | Clarence Smolenski | 20 | Son | Bookkeeper | New Jersey |
| 17 | Gertrude Knits | 13 | Boarder | — | New Jersey |
| 18 | Michael Hurley | 38 | Head | Machinist | New Jersey |
| 19 | Anna Hurley | 36 | Wife-H | — | New York |
| 20 | John Hurley | 16 | Son | — | New Jersey |
| 21 | Michael Hurley | 13 | Son | — | New Jersey |
| 22 | Edward Hurley | 10 | Son | — | New Jersey |
| 23 | Anna Hurley | 8 | Daughter | — | New Jersey |
| 24 | Robert Hurley | 4 | Son | — | New Jersey |
| 25 | Margaret J. Bolon | 40 | Head | Operator | New Jersey |
| 26 | Delia Brennan | 39 | Sister-in-law | — | Ireland |
| 27 | Cornelius Brennan | 27 | Son | — | New Jersey |
| 28 | Thomas Maher | 32 | Head | Teamster | New Jersey |
| 29 | Agnes Maher | 30 | Wife-H | Chauffeur | New Jersey |
| 30 | Thomas Maher | 5 | Son | — | New Jersey |
| 31 | Mary Maher | 4 | Daughter | — | New Jersey |
| 32 | Joseph Maher | 1 | Son | — | New Jersey |
| 33 | Patrick Brennan | 56 | Head | Laborer | New Jersey |
| 34 | Nora Brennan | 54 | Wife-H | — | New York |
| 35 | Joseph Brennan | 26 | Son | Salesman | New Jersey |
| 36 | Margaret Brennan | 23 | Daughter | Bookkeeper | New Jersey |
| 37 | Cecelia Brennan | 22 | Daughter | Clerk | New Jersey |
| 38 | Thomas Brennan | 20 | Son | Chauffeur | New Jersey |
| 39 | Robert Brennan | 19 | Son | Loader | New Jersey |
| 40 | Mary Brennan THIS PERSON | 17 | Daughter | Clerk | New Jersey |
| 41 | Winifred Brennan | 14 | Daughter | — | New Jersey |
| 42 | Barbara Brennan | 13 | Daughter | — | New Jersey |
| 43 | James Brennan | 9 | Son | — | New Jersey |
| 44 | Thomas Murphy | 55 | Head | — | Ireland |
| 45 | Katherine Murphy | 50 | Wife-H | — | Ireland |
| 46 | Thomas Jr. Murphy | 25 | Son | Clerk | New Jersey |
| 47 | John Murphy | 23 | Son | Machinist | New Jersey |
| 48 | Joseph Heenan | 55 | Head | Mason | New Jersey |
| 49 | Mary Heenan | 60 | Sister | — | New Jersey |
| 50 | Joseph Jr. Heenan | 21 | Son | Mason | New York |
Related Census Records
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)