WD
William Decker — 1940 US Census Record
Model Tree available1940 United States Federal Census · Essex-County, New Jersey
Our Model Tree links this William Decker across the 1920, 1930 and 1940 US Censuses in Essex-County, New Jersey (XGBoost, ~Confirmed), with identified parents Edward & Fred — first a son (b.~1915), then head of a 4-person household.
Age 25
b. ~1915
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, New Jersey |
| Surname | Decker |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Newark City |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Occupation | Press Operator |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Press Operator |
| Township / Ward | Newark City |
| Est. Birth Year | ~1915 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Martha Decker | Daughter | — | 37 | ~1903 |
| Edward Decker | Son | — | 33 | ~1907 |
| Jacob Decker | Head | — | 72 | ~1868 |
| William Decker | Son | — | 25 | ~1915 |
Census Appearances
1920
Essex, New …
Son, age 4
Essex, New Jersey · implied b. ~1916 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Decker |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | none |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Essex, New …
Son, age 14
Essex, New Jersey · implied b. ~1916 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Decker |
| Given Name | William E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Essex-County, New …
Son, age 25
Essex-County, New Jersey · implied b. ~1915 — 4 household members
| Surname | Decker |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Newark City |
| 1935 Residence (County) | Essex |
| Occupation | Press Operator |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| 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 Decker across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Edward Decker (~0.92 confidence) and father Fred Decker (~0.92 confidence) and father Jacob Decker (~0.92 confidence) and mother Caroline Decker (~0.92 confidence) and mother Selina Decker (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Edward Decker
b. ~1891
Source father
● Household
· direct · ~0.92
Father
Fred Decker
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Jacob Decker
b. ~1868
Source father
● Household
· direct · ~0.92
Mother
Caroline Decker
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Selina Decker
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Decker
Son · 1940 · age 25 · b. ~1915 · New Jersey
★ You are viewing this record
Sibling
Martha Decker
Sibling · 1940 · age 37
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Decker
Sibling · 1940 · age 33
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 — Essex-County, New Jersey
Open full size
1940 US Federal Census — Essex-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02424-00348)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Arthur Maffaeo | Maffaei | 40 | Head | Bus Operator | New Jersey |
| 2 | Emma Maffaeo | Maffaei | 35 | Wife | — | New Jersey |
| 3 | Helen Maffaeo | Maffaei | 17 | Daughter | New Worker | New Jersey |
| 4 | Arthur Jr Maffaeo | Maffaei | 14 | Son | — | New Jersey |
| 5 | Caroline Maffaeo | Maffaei | 9 | Daughter | — | New Jersey |
| 6 | Martha Maffaeo | Maffaei | 5 | Daughter | — | New Jersey |
| 7 | Carmella Maffaeo | Maffaei | 2 | Daughter | — | New Jersey |
| 8 | Jacob Decker | 72 | Head | — | Austria |
| 9 | Martha Decker | 37 | Daughter | Typist | New Jersey |
| 10 | Edward Decker | 33 | Son | Truck Driver | New Jersey |
| 11 | William Decker THIS PERSON | 25 | Son | Press Operator | New Jersey |
| 12 | Michael Kochucka | 51 | Head | Varnish Maker | Austria |
| 13 | Mary Kochucka | 50 | Wife | — | Austria |
| 14 | Louis Kochucka | 21 | Son | Tinsmith Worker | New Jersey |
| 15 | William Kochucka | 20 | Son | Varnish Worker | New Jersey |
| 16 | Anna Kochucka | 19 | Daughter | Beader Neck-Tubing | New Jersey |
| 17 | Christina Kochucka | 18 | Daughter | Operator Undergarment | New Jersey |
| 18 | Chris Perla | 36 | Head | Barber | New Jersey |
| 19 | Lillian Perla | 34 | Wife | Jewelry Boxes | New Jersey |
| 20 | Chris Perla | 15 | Son | — | New Jersey |
| 21 | Doris Perla | 12 | Daughter | — | New Jersey |
| 22 | Joan Perla | 4 | Daughter | — | New Jersey |
| 23 | Katherine Tesla | 55 | Head | — | New Jersey |
| 24 | Joseph Henko | 50 | Head | Laborer Gas & Electric | Slovakia |
| 25 | Mary Henko | 44 | Wife | — | Hungary |
| 26 | Mary Henko | 11 | Daughter | — | New Jersey |
| 27 | Edward Miller | 74 | Head | Night Watchman Dept Store | Switzerland |
| 28 | Mary Miller | 74 | Wife | — | New Jersey |
| 29 | William Schulz | 59 | Head | Barber | Germany |
| 30 | Hilda Schulz | 56 | Wife | — | Germany |
| 31 | Frederick Schulz | 31 | Son | Pipe Fitter Electrical | New Jersey |
| 32 | Dorothea Jaeger | 71 | Head | — | Germany |
| 33 | Stefan Maldon | 52 | Head | Iron Nr | Slovakia |
| 34 | Mary Maldon | 58 | Wife | — | Slovakia |
| 35 | Mary Maldon | 31 | Daughter | Stenographer Milk Co | New Jersey |
| 36 | Henry Kappel | 54 | Head | Asst Chief City Dept | New Jersey |
| 37 | George Kappel | 57 | Brother | Prop Candy Store | Germany |
| 38 | John Kappel | 50 | Brother | Clerk Candy Store | New Jersey |
| 39 | Henry Jr Kappel | 23 | Son | Electro Plating | New Jersey |
| 40 | John Hughes | 40 | Head | Bacteriologist | New Jersey |
Pedigree Summary
William + 2 siblings
Gen 1 · 5 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)