MW
Mary Williams — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lincoln-County, Washington
Our Model Tree links this Mary Williams across the 1920, 1930 and 1940 US Censuses in Lincoln-County, Washington (XGBoost, ~Confirmed) — first a spouse (b.~1887), then head of a 6-person household.
Age 53
b. ~1887
Female
Spouse
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Lincoln-County, Washington |
| Surname | Williams |
| Given Name | Mary A. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Mondovi Precinct |
| 1935 Residence (County) | Lincoln |
| Additional Details | |
| Industry | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Mondovi Precinct |
| Est. Birth Year | ~1887 |
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 |
|---|---|---|---|---|
| Ruth Williams | Daughter | — | 23 | ~1917 |
| Marie Williams | Daughter | — | 13 | ~1927 |
| John Williams | Head | — | 65 | ~1875 |
| Ralph Williams | Son | — | 20 | ~1920 |
| Howard Williams | Son | — | 19 | ~1921 |
| Mary Williams | Spouse | — | 53 | ~1887 |
Census Appearances
1920
Lincoln, Washington
Spouse, age 33
Lincoln, Washington · implied b. ~1887 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Lincoln, Washington
Spouse, age 42
Lincoln, Washington · implied b. ~1888 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Mary A |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 19 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Lincoln-County, Washington
Spouse, age 53
Lincoln-County, Washington · implied b. ~1887 — 6 household members
| Surname | Williams |
| Given Name | Mary A. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Mondovi Precinct |
| 1935 Residence (County) | Lincoln |
| Industry | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 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
Mary Williams
Spouse · 1940 · age 53 · b. ~1887 · Washington
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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 — Lincoln-County, Washington
Open full size
1940 US Federal Census — Lincoln-County, Washington
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04352-00259)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Gertrude Laupp | 24 | Daughter | — | Washington |
| 42 | Erick Krupke | 43 | Head | Farmer | Minnesota |
| 43 | Helen Krupke | 36 | Wife | — | Wisconsin |
| 44 | Carroll Krupke | 14 | Son | — | Washington |
| 45 | Gordon Krupke | 13 | Son | — | Washington |
| 46 | Alfred Krupke | 38 | Head | Farmer | Minnesota |
| 47 | Marguerite Krupke | 30 | Wife | — | Oregon |
| 48 | Earl Krupke | 30 | Head | Farmer | Washington |
| 49 | Murtis Krupke | 25 | Wife | — | Idaho |
| 50 | Harold L. Williams | 25 | Head | Farmer | Washington |
| 51 | Bernice Williams | 18 | Wife | — | Washington |
| 52 | John D. Williams | 65 | Head | Farmer | Kansas |
| 53 | Mary A. Williams THIS PERSON | 53 | Wife | — | Iowa |
| 54 | Ruth Williams | 23 | Daughter | — | Washington |
| 55 | Ralph Williams | 20 | Son | Farmer | Washington |
| 56 | Howard Williams | 19 | Son | Farmer | Washington |
| 57 | Marie Williams | 13 | Daughter | — | Washington |
| 58 | Earl R. Williams | 26 | Head | Farmer | Washington |
| 59 | Vernet Mcclure | 50 | Head | Farmer | Washington |
| 60 | Myrtle Mcclure | 49 | Wife | — | Iowa |
| 61 | Adolph Johnson | 43 | Head | Farmer | Iowa |
| 62 | Susan Johnson | 39 | Wife | — | Washington |
| 63 | Earl Johnson | 18 | Son | — | Washington |
| 64 | Melvin Johnson | 16 | Son | — | Washington |
| 65 | Mervyn Mcclure | 27 | Head | Farmer | Washington |
| 66 | Henry B. Janett | 30 | Head | Farmer | Washington |
| 67 | Almda Janett | 25 | Wife | — | Ohio |
| 68 | Gwen Avon Janett | 1 | Daughter | — | Washington |
| 69 | Ted Janett | 32 | Brother | Farmer | Washington |
| 70 | Antoinette Heckett | 78 | Head | — | Germany |
| 71 | Henry Heckett | 47 | Son | Laborer | Washington |
| 72 | Joseph Heckett | 45 | Son | Farmer | Washington |
| 73 | Alicia Heckett | 42 | Daughter | — | Washington |
| 74 | Casper Halstad | 77 | Head | — | Switzerland |
| 75 | Mary Halstad | 68 | Wife | — | Minnesota |
| 76 | Harold Halstad | 30 | Son | Farmer | Washington |
| 77 | George Janett | 67 | Head | Farmer | Minnesota |
| 78 | Enid Janett | 57 | Wife | — | Illinois |
| 79 | Anna Jean Janett | 15 | Daughter | — | Washington |
| 80 | Claude Wright | 24 | Employee | Laborer | Missouri |
Related Census Records
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)