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John Decker — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, New Jersey
Our Model Tree links this John Decker across the 1930 and 1940 US Censuses in Middlesex-County, New Jersey (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 7-person household.
Age 12
b. ~1928
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, New Jersey |
| Surname | Decker |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | New Brunswick |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Highest Grade | 7 |
| 1935 Residence | Same House |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | New Brunswick |
| Est. Birth Year | ~1928 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Decker | Son | — | 12 | ~1928 |
| William Decker | Son | — | 8 | ~1932 |
| Jeanne Decker | Daughter | — | 6 | ~1934 |
| Joseph Decker | Head | — | 38 | ~1902 |
| Amelia Decker | Spouse | — | 38 | ~1902 |
| Joan Decker | Daughter | — | 9 | ~1931 |
| James Decker | Son | — | 10 | ~1930 |
Census Appearances
1930
Middlesex, New …
Son, age 1
Middlesex, New Jersey · implied b. ~1929 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Ducker |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Wisconsin |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Middlesex-County, New …
Son, age 12
Middlesex-County, New Jersey · implied b. ~1928 — 7 household members
| Surname | Decker |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | New Brunswick |
| 1935 Residence (County) | Middlesex |
| Highest Grade | 7 |
| 1935 Residence | Same House |
| 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 Decker across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Decker
Son · 1940 · age 12 · b. ~1928 · New Jersey
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Sibling
Joan Decker
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Decker
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Decker
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jeanne Decker
Sibling · 1940 · age 6
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 — Middlesex-County, New Jersey
Open full size
1940 US Federal Census — Middlesex-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02360-00190)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Campagnoni | 32 | Son | Agent | New York |
| 2 | Joseph Decker | 38 | Head | Machinist | New Jersey |
| 3 | Amelia Decker | 38 | Wife | — | New Jersey |
| 4 | John Decker THIS PERSON | 12 | Son | — | New Jersey |
| 5 | James Decker | 10 | Son | — | New Jersey |
| 6 | Joan Decker | 9 | Daughter | — | New Jersey |
| 7 | William Joel Decker | 8 | Son | — | New Jersey |
| 8 | Jeanne Decker | 6 | Daughter | — | New Jersey |
| 9 | Minnie Hartman | 61 | Head | — | New Jersey |
| 10 | Walter Hartman | 59 | Husband | Machinist | New York |
| 11 | — | None | — | — | — |
| 12 | Angela Francis | 46 | Head | — | New Jersey |
| 13 | Harry Francis | 20 | Son | Core Maker | New Jersey |
| 14 | Virginia Francis | 19 | Daughter | Packer | New Jersey |
| 15 | Josephine Francis | 16 | Daughter | — | New Jersey |
| 16 | James Francis | 14 | Son | — | New Jersey |
| 17 | John Francis | 13 | Son | — | New Jersey |
| 18 | Mary Francis | 11 | Daughter | — | New Jersey |
| 19 | James J. O'Connor | 52 | Head | Foreman | Massachusetts |
| 20 | Ann O'Connor | 35 | Wife | — | Massachusetts |
| 21 | Mary Irene O'Connor | 8 | Daughter | — | Massachusetts |
| 22 | James Jr. O'Connor | 6 | Son | — | Massachusetts |
| 23 | William Francis O'Connor | 5 | Son | — | Massachusetts |
| 24 | Dimitri Vlachou | 52 | Head | Waiter | Greece |
| 25 | Ella Vlachou | 50 | Wife | — | Switzerland |
| 26 | Marie Vlachou | 21 | Daughter | Operator | New Jersey |
| 27 | Helen Vlachou | 19 | Daughter | Waitress | New Jersey |
| 28 | Georgette Vlachou | 12 | Daughter | — | New Jersey |
| 29 | Irving Posner | 47 | Head | Manager | New York |
| 30 | Ruth Posner | 42 | Wife | — | New York |
| 31 | Philip Posner | 22 | Son | Collector | New York |
| 32 | Rhoda Posner | 19 | Daughter | Saleslady | New York |
| 33 | Charles Goodman | 62 | Head | Baker | Russia |
| 34 | Sarah Goodman | 60 | Wife | — | Russia |
| 35 | Alfred S. Wilkins | 36 | Head | Chauffeur | New Jersey |
| 36 | Margaret S. Wilkins | 34 | Wife | Typist | New Jersey |
| 37 | Anne E. Wilkins | 12 | Daughter | — | New Jersey |
| 38 | William C. Wosnitzer | 50 | Head | Machinist | Germany |
| 39 | Julia Wosnitzer | 44 | Wife | — | Hungary |
| 40 | William Wosnitzer | 22 | Son | Machinist | New Jersey |
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)