WD
William Decker — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this William Decker across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1894), then head of a 5-person household.
Age 46
b. ~1894
Male
Head
Born: New York
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | DECKER |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Cylinder Pressman |
| Industry | Printing Co. |
| Class of Worker | PW |
| Hours Worked | 13 |
| Income (1939) | 729 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Cylinder Pressman |
| Township / Ward | Chicago |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Richard Decker | Son | — | 9 | ~1931 |
| William Decker | Head | — | 46 | ~1894 |
| Camille Decker | Spouse | — | 32 | ~1908 |
| Clarence Decker | Son | — | 12 | ~1928 |
| Camille Decker | Daughter | — | 10 | ~1930 |
Census Appearances
1930
Cook, Illinois
Other, age 35
Cook, Illinois · implied b. ~1895 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Decker |
| Given Name | William A. |
| Relationship to Head | Son-in-law |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | New York |
| Age at First Marriage | 33 |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | Pressman |
| Industry | Printing |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Cook-County, Illinois
Head, age 46
Cook-County, Illinois · implied b. ~1894 — 5 household members
| Surname | DECKER |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Cylinder Pressman |
| Industry | Printing Co. |
| Class of Worker | PW |
| Hours Worked | 13 |
| Income (1939) | 729 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Decker
Head · 1940 · age 46 · b. ~1894 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01004-00020)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George Arendt | 17 | Son | — | Illinois |
| 2 | Joseph Trefelner | 76 | Head | — | Pennsylvania |
| 3 | Emily Trefelner | 66 | Wife | — | New York |
| 4 | Wilfred Brynjolfsson | 28 | Head | Brick Layer | Canada |
| 5 | Olga Brynjolfsson | 27 | Wife | — | Illinois |
| 6 | Kenneth Brynjolfsson | 1 | Son | — | Illinois |
| 7 | Joseph Kosydar | 34 | Head | Spring Maker | Pennsylvania |
| 8 | Anna Kosydar | 25 | Wife | — | Illinois |
| 9 | Dolores Kosydar | 2 | Daughter | — | Illinois |
| 10 | William Decker THIS PERSON | 46 | Head | Cylinder Pressman | New York |
| 11 | Camille Decker | 32 | Wife | — | Illinois |
| 12 | Clarence Decker | 12 | Son | — | Illinois |
| 13 | Camille Decker | 10 | Daughter | — | Illinois |
| 14 | Richard Decker | 9 | Son | — | Illinois |
| 15 | George B. Proesel | 77 | Head | — | Illinois |
| 16 | Anton Hofmann | 47 | Head | Shoemaker | Illinois |
| 17 | Nell Hofmann | 40 | Wife | Labeler | Poland |
| 18 | Edith Hofmann | 17 | Daughter | — | Illinois |
| 19 | Catherine Hofmann | 16 | Daughter | — | Illinois |
| 20 | Alexander Dietzel | 39 | Head | Chauffeur | Russia |
| 21 | Clara Dietzel | 34 | Wife | — | Illinois |
| 22 | Russell Dietzel | 16 | Son | — | Illinois |
| 23 | Paul Dietzel | 11 | Son | — | Illinois |
| 24 | Marlene Dietzel | 7 | Daughter | — | Illinois |
| 25 | Emily Dietzel | 64 | Mother | — | Russia |
| 26 | Sylvester Wislow | 47 | Head | Housekeeper | Russia |
| 27 | Luba Wislow | 45 | Wife | Bread Route | Russia |
| 28 | Leonard Wislow | 22 | Son | Shipping Clerk | Illinois |
| 29 | Alex Wislow | 21 | Son | Milling Machine Operator | Illinois |
| 30 | Lillian Wislow | 7 | Daughter | — | Illinois |
| 31 | Walter Rakyta | 26 | Head | Maintenance | Illinois |
| 32 | Ann Rakyta | 27 | Wife | — | Illinois |
| 33 | Laddie Rakyta | 3 | Son | — | Illinois |
| 34 | John R. Clarke | 46 | Head | Architect & Sculptor | Pennsylvania |
| 35 | Mary Clarke | 32 | Wife | — | Illinois |
| 36 | Louise Clarke | 10 | Daughter | — | Illinois |
| 37 | Jacqueline Clarke | 8 | Daughter | — | Illinois |
| 38 | Dolores Clarke | 2 | Daughter | — | Illinois |
| 39 | Henry Grandt | 63 | Head | Handyman | Germany |
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)