JM
John Maher — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hudson-County, New Jersey
Our Model Tree links this John Maher across the 1930 and 1940 US Censuses in Hudson-County, New Jersey (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 9-person household.
Age 15
b. ~1925
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hudson-County, New Jersey |
| Surname | Maher |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Bayonne |
| 1935 Residence (County) | Hudson |
| Additional Details | |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | Bayonne |
| 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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Irene Maher | Head | — | 44 | ~1896 |
| Kathryn Maher | Daughter | — | 19 | ~1921 |
| John Maher | Son | — | 15 | ~1925 |
| Alice Nelson | Daughter | — | 15 | ~1925 |
| William Nelson | Son | — | 25 | ~1915 |
| Robert Maher | Son | — | 10 | ~1930 |
| Alex Nelson | Son | — | 23 | ~1917 |
| Charles Nelson | Other | — | 54 | ~1886 |
| Marie Nelson | Daughter | — | 21 | ~1919 |
Census Appearances
1930
Hudson, New …
Son, age 5
Hudson, New Jersey · implied b. ~1925 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Maher |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Hudson-County, New …
Son, age 15
Hudson-County, New Jersey · implied b. ~1925 — 9 household members
| Surname | Maher |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Bayonne |
| 1935 Residence (County) | Hudson |
| Highest Grade | H 2 |
| 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 John Maher across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Maher
Son · 1940 · age 15 · b. ~1925 · New Jersey
★ You are viewing this record
Sibling
Marie Nelson
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Nelson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathryn Maher
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Maher
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Nelson
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alex Nelson
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 — Hudson-County, New Jersey
Open full size
1940 US Federal Census — Hudson-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02346-00166)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Sidney Elas | 16 | son | — | Bayonne, N.J. |
| 42 | Leonard Elas | 12 | son | — | Bayonne, N.J. |
| 43 | David Elas | 6 | son | — | Bayonne, N.J. |
| 44 | Alex Simesky | 82 | Father | — | Russia |
| 45 | John Minarik | 32 | Head | Laborer | Bayonne, N.J. |
| 46 | Margaret Minarik | 26 | wife | Housewife | Bayonne, N.J. |
| 47 | Dominick Starkoff | 47 | Head | Principal | Bayonne, N.J. |
| 48 | Ethel Starkoff | 38 | wife | — | New York, N.Y. |
| 49 | Charles Wohnus | 39 | Head | Can Maker | Bayonne, N.J. |
| 50 | Theresa Wohnus | 39 | wife | — | Bayonne, N.J. |
| 51 | Sam D. Lipman | 39 | Head | Dentist | Bayonne, N.J. |
| 52 | Shirley Lipman | 33 | wife | — | Bayonne, N.J. |
| 53 | James Curran | 33 | Head | Chemist | Virginia |
| 54 | Alice Curran | 32 | wife | — | Bayonne, N.J. |
| 55 | Mary Curran | 1 | daughter | — | Jersey City, N.J. |
| 56 | Vincent Hory | 30 | Head | Doctor | Bayonne, N.J. |
| 57 | Florence Hory | 22 | wife | — | Bayonne, N.J. |
| 58 | Maurice O'Donnell | 58 | Head | Oil Worker | Pennsylvania |
| 59 | Nellie O'Donnell | 50 | wife | — | Pennsylvania |
| 60 | Catherine O'Donnell | 14 | daughter | — | Bayonne, N.J. |
| 61 | Margaret O'Donnell | 12 | daughter | — | Bayonne, N.J. |
| 62 | John Melega | 52 | Head | Chef | Austria |
| 63 | Anna Melega | 46 | wife | — | Elizabeth, N.J. |
| 64 | William Melega | 21 | son | Clerk | Bayonne, N.J. |
| 65 | Bulla John | 38 | Lodger | Carpenter | Austria |
| 66 | James Silva | 38 | Head | Driver | Bayonne, N.J. |
| 67 | Viola Silva | 31 | wife | — | Bayonne, N.J. |
| 68 | Jane Silva | 12 | daughter | — | Jersey City, N.J. |
| 69 | James Silva | 10 | son | — | Bayonne, N.J. |
| 70 | Patricia Silva | 8 | daughter | — | Bayonne, N.J. |
| 71 | Irene Maher | 44 | Head | Teacher | New Jersey |
| 72 | Kathryn Maher | 19 | daughter | — | New Jersey |
| 73 | John Maher THIS PERSON | 15 | son | — | New Jersey |
| 74 | Robert Maher | 10 | son | — | New Jersey |
| 75 | Charles Nelson | 54 | Father | Clerk | Jersey City, N.J. |
| 76 | William Nelson | 25 | son | Stillman | Bayonne, N.J. |
| 77 | Alex Nelson | 23 | son | Machinist | Bayonne, N.J. |
| 78 | Marie Nelson | 21 | daughter | Machine Oper | Bayonne, N.J. |
| 79 | Alice Nelson | 15 | daughter | — | Elizabeth, N.J. |
| 80 | Andrew Nelson | 51 | Head | Machinist | Brooklyn, N.Y. |
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)