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Grace Williams — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jo-Daviess-County, Illinois
Our Model Tree links this Grace Williams across the 1920, 1930 and 1940 US Censuses in Jo-Daviess-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1893), then head of a 4-person household.
Age 47
b. ~1893
Female
Spouse
Born: Wisconsin
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Jo-Daviess-County, Illinois |
| Surname | Williams |
| Given Name | Grace |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Thompson Twp |
| 1935 Residence (County) | Jo Daviess |
| Additional Details | |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Township / Ward | Thompson Twp |
| Est. Birth Year | ~1893 |
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 Grace | Age | Birth yr |
|---|---|---|---|---|
| D Williams | Head | — | 49 | ~1891 |
| Gene Mainz | Other | — | 18 | ~1922 |
| Charles Williams | Son | — | 17 | ~1923 |
| Grace Williams | Spouse | — | 47 | ~1893 |
Census Appearances
1920
Jo Daviess, …
Spouse, age 27
Jo Daviess, Illinois · implied b. ~1893 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Grace D. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| Father's Birthplace | Illinois |
| Mother's Birthplace | England |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1930
Jo Daviess, …
Spouse, age 37
Jo Daviess, Illinois · implied b. ~1893 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Grace |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| Age at First Marriage | 19 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | England |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Jo-Daviess-County, Illinois
Spouse, age 47
Jo-Daviess-County, Illinois · implied b. ~1893 — 4 household members
| Surname | Williams |
| Given Name | Grace |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Thompson Twp |
| 1935 Residence (County) | Jo Daviess |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
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 Grace Williams across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Grace Williams
Spouse · 1940 · age 47 · b. ~1893 · 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 — Jo-Daviess-County, Illinois
Open full size
1940 US Federal Census — Jo-Daviess-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00817-00917)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Carrie Koester | 52 | Wife | — | Illinois |
| 42 | Ruth Koester | 16 | Daughter | — | Illinois |
| 43 | Leslie Koester | 32 | Head | Farmer | Illinois |
| 44 | Irene Koester | 34 | Wife | — | Wisconsin |
| 45 | Betty Koester | 7 | Daughter | — | Illinois |
| 46 | Clesta Koester | 5 | Daughter | — | Illinois |
| 47 | Melvin Schultz | 19 | Hired Hand | Farmhand | Illinois |
| 48 | Leon Dittmar | 35 | Head | Farmer | Illinois |
| 49 | Olga Dittmar | 34 | Wife | — | Illinois |
| 50 | Clyde Dittmar | 5 | Son | — | Illinois |
| 51 | D. Milton Williams | 49 | Head | Farmer | Illinois |
| 52 | Grace Williams THIS PERSON | 47 | Wife | — | Wisconsin |
| 53 | Charles Williams | 17 | Son | — | Illinois |
| 54 | Gene Mainz | 18 | Hired Hand | Farmhand | Illinois |
| 55 | Fred Stephan | 52 | Head | Farmer | Illinois |
| 56 | Bertha Stephan | 47 | Wife | — | Illinois |
| 57 | Verle Stephan | 25 | Son | Farmer | Illinois |
| 58 | Myrtle Stephan | 21 | Daughter-in-law | — | Illinois |
| 59 | Ernest Boettner | 38 | Head | Farmer | Illinois |
| 60 | Ruth Boettner | 36 | Wife | — | Iowa |
| 61 | Joy Carroll Boettner | 11 | Daughter | — | Iowa |
| 62 | Arthur Frank Boettner | 8 | Son | — | Iowa |
| 63 | Jon Ernest Boettner | 1 | Son | — | Illinois |
| 64 | Benjamin Mengemeyer | 52 | Head | — | Illinois |
| 65 | Carrie Mengemeyer | 46 | Wife | — | Illinois |
| 66 | Blanchard Mengemeyer | 24 | Son | — | Illinois |
| 67 | Maurice Mengemeyer | 22 | Son | — | Illinois |
| 68 | Vivian Mengemeyer | 19 | Daughter | — | Illinois |
| 69 | Delores Mengemeyer | 17 | Daughter | — | Illinois |
| 70 | Kermit Mengemeyer | 15 | Son | — | Illinois |
| 71 | Calvin Mengemeyer | 12 | Son | — | Illinois |
| 72 | Beverly Mengemeyer | 9 | Daughter | — | Illinois |
| 73 | Ed Polchow | 64 | Head | Farmer | Illinois |
| 74 | Etta Polchow | 60 | Wife | Farmer | Illinois |
| 75 | Raymond Stanes | 40 | Head | Farmer | Illinois |
| 76 | Elma Stanes | 40 | Wife | — | Illinois |
| 77 | Eloise Stanes | 19 | Daughter | — | Illinois |
| 78 | Marian Stanes | 13 | Daughter | — | Illinois |
| 79 | William Schumacher | 62 | Head | Farmer | Germany |
| 80 | Alice Schumacher | 56 | Wife | — | Illinois |
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)