JW
John Williamson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Yellowstone-County, Montana
Our Model Tree links this John Williamson across the 1930 and 1940 US Censuses in Yellowstone-County, Montana (XGBoost, ~Confirmed) — first a head (b.~1901), then head of a 10-person household.
Age 39
b. ~1901
Male
Head
Born: Oklahoma
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Yellowstone-County, Montana |
| Surname | Williamson |
| Given Name | John C |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Oklahoma |
| 1935 Residence (City) | School District 2 |
| 1935 Residence (County) | Yellowstone |
| Additional Details | |
| Occupation | Proprietor |
| Industry | Welding Shop |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 1568 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Oklahoma |
| Birth Country | United States |
| Birthplace (normalized) | oklahoma |
| Occupation | Proprietor |
| Township / Ward | School District 2 |
| Est. Birth Year | ~1901 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Marjory Williamson | Daughter | — | 16 | ~1924 |
| Florence Williamson | Daughter | — | 9 | ~1931 |
| Betty Williamson | Daughter | — | 10 | ~1930 |
| Mary Williamson | Daughter | — | 13 | ~1927 |
| Stella Williamson | Daughter | — | 3 | ~1937 |
| John Williamson | Head | — | 39 | ~1901 |
| Henry Williamson | Son | — | 7 | ~1933 |
| John Williamson | Son | — | 15 | ~1925 |
| Edward Williamson | Son | — | 14 | ~1926 |
| Mayday Williamson | Spouse | — | 34 | ~1906 |
Census Appearances
1930
Yellowstone, Montana
Head, age 29
Yellowstone, Montana · implied b. ~1901 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williamson |
| Given Name | John C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Oklahoma |
| Age at First Marriage | 22 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Missouri |
| Occupation | Welder |
| Industry | Radiator |
| Class of Worker | O |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | $2000 |
| Radio Set | R |
| Birth State | Oklahoma |
| Birth Country | United States |
| Birthplace (normalized) | oklahoma |
1940
Yellowstone-County, Montana
Head, age 39
Yellowstone-County, Montana · implied b. ~1901 — 10 household members
| Surname | Williamson |
| Given Name | John C |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Oklahoma |
| 1935 Residence (City) | School District 2 |
| 1935 Residence (County) | Yellowstone |
| Occupation | Proprietor |
| Industry | Welding Shop |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 1568 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Oklahoma |
| Birth Country | United States |
| Birthplace (normalized) | oklahoma |
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 John Williamson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Williamson
Head · 1940 · age 39 · b. ~1901 · Montana
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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 — Yellowstone-County, Montana
Open full size
1940 US Federal Census — Yellowstone-County, Montana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02234-00719)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Adelaide Nelson | 38 | Wife | — | Indiana |
| 42 | Wendell L Nelson | 16 | Son | — | Indiana |
| 43 | Dennis W Nelson | 14 | Son | — | Indiana |
| 44 | Rita A Nelson | 9 | Daughter | — | Montana |
| 45 | James L Nelson | 4 | Son | — | Montana |
| 46 | Kenneth R Nelson | 2 | Son | — | Montana |
| 47 | Henry E Wick | 46 | Head | Credit Manager | North Dakota |
| 48 | Mildred H Wick | 36 | Wife | — | Minnesota |
| 49 | Elaine E Wick | 13 | Daughter | — | Minnesota |
| 50 | Ann E Wick | 2 | Daughter | — | Montana |
| 51 | Arthur P Krause | 64 | Lodger | Retired | Minnesota |
| 52 | John C Williamson THIS PERSON | 39 | Head | Proprietor | Oklahoma |
| 53 | Mayday L Williamson | 34 | Wife | — | Montana |
| 54 | Marjory M Williamson | 16 | Daughter | — | Montana |
| 55 | John C Williamson | 15 | Son | — | Montana |
| 56 | Edward J Williamson | 14 | Son | — | Montana |
| 57 | Mary L Williamson | 13 | Daughter | — | Montana |
| 58 | Florence J Williamson | 9 | Daughter | — | Montana |
| 59 | Betty J Williamson | 10 | Daughter | — | Montana |
| 60 | Henry F Williamson | 7 | Son | — | Montana |
| 61 | Stella J Williamson | 3 | Daughter | — | Montana |
| 62 | Olan E Lee | 12 | Head | Proprietor | North Dakota |
| 63 | Ethel A Lee | 45 | Wife | — | Iowa |
| 64 | Donald H Lee | 19 | Son | — | Montana |
| 65 | Richard H Lee | 19 | Son | — | Montana |
| 66 | Robert Lee | 16 | Son | — | Montana |
| 67 | Alice M Miller | 24 | Maid | Maid | South Dakota |
| 68 | Iver R Smith | 53 | Head | Factory Laborer | Canada-English |
| 69 | Agnes M Smith | 12 | Wife | — | Canada-French |
| 70 | Claude E Vey | 48 | Head | — | Missouri |
| 71 | Effie C Vey | 46 | Wife | Enumerator | Missouri |
| 72 | Claude Vey | 21 | Son | — | Montana |
| 73 | Gladys E Vey | 21 | Daughter | New Worker | Montana |
| 74 | John Haas | 55 | Head | Laborer | Russia |
| 75 | Bertha C Haas | 39 | Wife | — | Russia |
| 76 | Frieda Haas | 15 | Daughter | — | North Dakota |
| 77 | Esther Haas | 13 | Daughter | — | North Dakota |
| 78 | Larene Haas | 10 | Daughter | — | North Dakota |
| 79 | Jess E Drennan | 52 | Head | Carpenter | Missouri |
| 80 | Annabel Drennan | 38 | Wife | — | Scotland |
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)