WB
William Brennan — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Essex, New Jersey
Our Model Tree links this William Brennan across the 1930 and 1940 US Censuses in Essex, New Jersey (XGBoost, ~Confirmed) — first a son (b.~1894), then head of a 8-person household.
Age 36
b. ~1894
Male
Son
Born: New Jersey
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Essex, New Jersey |
| Surname | Brennan |
| Given Name | William Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New York |
| Mother's Birthplace | New Jersey |
| Additional Details | |
| Occupation | Salesman |
| Industry | Cement |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Salesman |
| Township / Ward | Fire Part |
| Est. Birth Year | ~1894 |
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.
8 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Robert Brennan | Son | — | 14 | ~1916 |
| William Brennan | Head | — | 63 | ~1867 |
| Clifford Brennan | Son | — | 24 | ~1906 |
| William Brennan | Son | — | 36 | ~1894 |
| Edgar Brennan | Son | — | 25 | ~1905 |
| Catherine Brennan | Daughter | — | 21 | ~1909 |
| Margaret Brennan | Spouse | — | 57 | ~1873 |
| Mary Brennan | Daughter | — | 19 | ~1911 |
Census Appearances
1930
Essex, New …
Son, age 36
Essex, New Jersey · implied b. ~1894 — 8 household members
| Surname | Brennan |
| Given Name | William Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New York |
| Mother's Birthplace | New Jersey |
| Occupation | Salesman |
| Industry | Cement |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Essex-County, New …
Head, age 46
Essex-County, New Jersey · implied b. ~1894 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennen |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Orange |
| 1935 Residence (County) | Essex |
| Occupation | Salesman |
| Industry | Cement |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2500 |
| Highest Grade | H-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 William Brennan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Brennan
Son · 1930 · age 36 · b. ~1894 · New Jersey
★ You are viewing this record
Sibling
Robert Brennan
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Brennan
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edgar Brennan
Sibling · 1930 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clifford Brennan
Sibling · 1930 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Brennan
Sibling · 1930 · age 21
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:newjerseycensus00reel1344:1135)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Irene Mccarthy | 39 | Wife | None | New York |
| 52 | Timothy J. Mccarthy | 7 | Son | None | New York |
| 53 | Peter Mccarthy | 5 | Son | None | New York |
| 54 | William Mice | 32 | Head | Deliveryman | Scotland |
| 55 | Edna Mice | 33 | Wife | None | Scotland |
| 56 | Grace Mice | 4 | Daughter | None | New Jersey |
| 57 | Vera Mice | 2 | Daughter | None | New Jersey |
| 58 | James Parrott | 40 | Brother | Agent | Scotland |
| 59 | Thomas Murphy | 41 | Head | Retail Merchant | New Jersey |
| 60 | Catherine Murphy | 40 | Wife | None | Pennsylvania |
| 61 | Gerald Murphy | 17 | Son | None | New Jersey |
| 62 | Thomas J. Murphy | 15 | Son | None | New Jersey |
| 63 | Francis Murphy | 3 | Son | None | New Jersey |
| 64 | John Driscoll | 78 | Father | None | Ireland |
| 65 | Nora Driscoll | 42 | Sister | Bookkeeper | Pennsylvania |
| 66 | William King | 57 | Head | Carpenter | England |
| 67 | Mary King | 50 | Wife | None | Ireland |
| 68 | Mary King | 24 | daughter | Cashier | New Jersey |
| 69 | Agnes King | 22 | daughter | None | Ireland |
| 70 | Bernard King | 18 | son | Letter Carrier | New Jersey |
| 71 | Harry Beck | 48 | Head | Salesman | New Jersey |
| 72 | Catherine Beck | 35 | Wife | None | New Jersey |
| 73 | Harry Beck | 15 | Son | None | New Jersey |
| 74 | Marion Beck | 16 | Daughter | None | New Jersey |
| 75 | William E. Brennan | 63 | Head | Laborer | New York |
| 76 | Margaret Brennan | 57 | Wife | None | Ireland |
| 77 | William Jr. Brennan THIS PERSON | 36 | Son | Salesman | New Jersey |
| 78 | Edgar M. Brennan | 25 | Son | Printer | New Jersey |
| 79 | Clifford Brennan | 24 | Son | Salesman | New York |
| 80 | Robert J. Brennan | 14 | Son | None | New Jersey |
| 81 | Catherine M. Brennan | 21 | Daughter | Clerk | New Jersey |
| 82 | Mary M. Brennan | 19 | Daughter | Cashier | New Jersey |
| 83 | Walter Holladay | 36 | Head | Plumber | New Jersey |
| 84 | Helen Holladay | 32 | Wife | None | New Jersey |
| 85 | Evelyn Holladay | 12 | Daughter | None | New Jersey |
| 86 | Ruth Holladay | 10 | Daughter | None | New Jersey |
| 87 | Ray Holladay | 2 | Son | None | New Jersey |
| 88 | Alice Riley | 64 | H | None | New Jersey |
| 89 | Alice J. Riley | 16 | Daughter | None | New Jersey |
| 90 | Madeline Riley | 23 | Daughter | None | New Jersey |
| 91 | Edward Riley | 19 | Son | None | New Jersey |
| 92 | William De Hart | 7 | Grandson | None | New Jersey |
| 93 | Alice De Hart | 5 | Granddaughter | None | New Jersey |
| 94 | Thomas Nicholl | 34 | Head | Clerk | New Jersey |
| 95 | Elsie Nicholl | 31 | Wife | None | New Jersey |
| 96 | Robert Nicholl | 9 | Son | None | New Jersey |
| 97 | Elmer Nicholl | 4 | Son | None | New Jersey |
| 98 | Thomas Nicholl | 2 | Son | None | New Jersey |
| 99 | William Nicholl | 2 | Son | None | New Jersey |
| 100 | Timothy Farrell | 48 | Head | Delivery Man | Ireland |
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)