MD
Mary Decker — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Kent-County, Michigan
Our Model Tree links this Mary Decker across the 1930 and 1940 US Censuses in Kent-County, Michigan (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 6-person household.
Age 11
b. ~1929
Female
Daughter
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Kent-County, Michigan |
| Surname | Decker |
| Given Name | Mary Jane |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Grand Rapids Twp |
| 1935 Residence (County) | Kent |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same Place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Grand Rapids Twp |
| Est. Birth Year | ~1929 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Esther Decker | Spouse | — | 46 | ~1894 |
| George Decker | Son | — | 15 | ~1925 |
| Henry Decker | Head | — | 49 | ~1891 |
| Mary Decker | Daughter | — | 11 | ~1929 |
| Henry Decker | Son | — | 17 | ~1923 |
| Betty Decker | Daughter | — | 9 | ~1931 |
Census Appearances
1930
Kent, Michigan
Daughter, age 1
Kent, Michigan · implied b. ~1929 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Decker |
| Given Name | Mary Jane |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | Sweden |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Kent-County, Michigan
Daughter, age 11
Kent-County, Michigan · implied b. ~1929 — 6 household members
| Surname | Decker |
| Given Name | Mary Jane |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Grand Rapids Twp |
| 1935 Residence (County) | Kent |
| Highest Grade | No 6 |
| 1935 Residence | Same Place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 Mary Decker across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Decker
Daughter · 1940 · age 11 · b. ~1929 · Michigan
★ You are viewing this record
Sibling
George Decker
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Decker
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Henry Decker
Sibling · 1940 · age 17
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 — Kent-County, Michigan
Open full size
1940 US Federal Census — Kent-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01774-00871)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Cecelia Patt | 45 | Wife | — | Michigan |
| 42 | Russell Patt | 25 | Son | Electrician | Michigan |
| 43 | Bernadine Patt | 23 | Daughter | — | Michigan |
| 44 | Roberta Patt | 3 | Daughter | — | Michigan |
| 45 | Dorothy Kay Patt | 1 | Granddaughter | — | Michigan |
| 46 | Henry Decker | 49 | Head | Maintenance Man | New Jersey |
| 47 | Esther Decker | 46 | Wife | — | Ohio |
| 48 | Henry Jr Decker | 17 | Son | Farmhand | Michigan |
| 49 | George Decker | 15 | Son | — | Michigan |
| 50 | Mary Jane Decker THIS PERSON | 11 | Daughter | — | Michigan |
| 51 | Betty Ann Decker | 9 | Daughter | — | Michigan |
| 52 | Anthony Gaplawny | 35 | Head | Cabinetmaker | Ohio |
| 53 | Mary Gaplawny | 33 | Wife | — | West Virginia |
| 54 | Elmer Troost | 47 | Head | Salesman | Michigan |
| 55 | Nellie Troost | 39 | Wife | — | Michigan |
| 56 | Elmer Jr Troost | 20 | Son | — | Michigan |
| 57 | Robert Troost | 19 | Son | — | Michigan |
| 58 | Ronald Troost | 15 | Son | — | Michigan |
| 59 | Carol Troost | 10 | Daughter | — | Michigan |
| 60 | Donna Troost | 8 | Daughter | — | Michigan |
| 61 | Arthur Van Eck | 42 | Head | Disabled War Veteran | Michigan |
| 62 | Bessie Van Eck | 40 | Wife | — | Michigan |
| 63 | Ann Jane Van Eck | 18 | Daughter | Student | Michigan |
| 64 | Arthur O Van Eck | 14 | Son | — | Colorado |
| 65 | Edwin B Van Eck | 4 | Son | — | Michigan |
| 66 | Karl Herman | 28 | Head | Engineer | Michigan |
| 67 | Elizabeth Herman | 31 | Wife | — | Michigan |
| 68 | Terry Herman | 3 | Son | — | Michigan |
| 69 | Elizabeth Herman | 56 | Mother-in-law | — | Germany |
| 70 | Jessie Stawitz | 66 | Head | — | Michigan |
| 71 | Frank Ulrich | 57 | Roomer | Inspector | Michigan |
| 72 | Gustaf A Hokanson | 62 | Head | Toolmaker | Sweden |
| 73 | Hilda Hokanson | 63 | Wife | — | Sweden |
| 74 | Nadine Hokanson | 23 | Daughter | Secretary | Michigan |
| 75 | Bernard H Roskey | 34 | Head | Civil Engineer | Michigan |
| 76 | Edith Roskey | 33 | Wife | — | Michigan |
| 77 | Eugene Roskey | 9 | Son | — | Michigan |
| 78 | Lola Roskey | 7 | Daughter | — | Michigan |
| 79 | Lawrence Spetocker | 32 | Head | Polisher | Michigan |
| 80 | Stella Spetocker | 27 | Wife | — | Michigan |
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)