JW
James Williamson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Peoria-County, Illinois
Our Model Tree links this James Williamson across the 1930 and 1940 US Censuses in Peoria-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 10-person household.
Age 12
b. ~1928
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Peoria-County, Illinois |
| Surname | Williamson |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chillicothe |
| 1935 Residence (County) | Peoria |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chillicothe |
| Est. Birth Year | ~1928 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Irene Williamson | Daughter | — | 16 | ~1924 |
| Ruth Williamson | Daughter | — | 15 | ~1925 |
| Marie Williamson | Daughter | — | 8 | ~1932 |
| Doris Williamson | Daughter | — | 4 | ~1936 |
| Guy Williamson | Head | — | 46 | ~1894 |
| James Williamson | Son | — | 12 | ~1928 |
| Eugene Williamson | Son | — | 9 | ~1931 |
| Donald Williamson | Son | — | 17 | ~1923 |
| Philip Williamson | Son | — | 20 | ~1920 |
| Gladys Williamson | Spouse | — | 39 | ~1901 |
Census Appearances
1930
Peoria, Illinois
Son, age 2
Peoria, Illinois · implied b. ~1928 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williamson |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Peoria-County, Illinois
Son, age 12
Peoria-County, Illinois · implied b. ~1928 — 10 household members
| Surname | Williamson |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chillicothe |
| 1935 Residence (County) | Peoria |
| Highest Grade | No 6 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 James Williamson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Williamson
Son · 1940 · age 12 · b. ~1928 · Illinois
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Sibling
Irene Williamson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Philip Williamson
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Doris Williamson
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Williamson
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Williamson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Williamson
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugene Williamson
Sibling · 1940 · age 9
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 — Peoria-County, Illinois
Open full size
1940 US Federal Census — Peoria-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00864-00140)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Guy Williamson | 46 | Head | Car Inspector | Illinois |
| 42 | Gladys Williamson | 39 | Wife | — | Illinois |
| 43 | Philip Williamson | 20 | Son | Truck Driver | Illinois |
| 44 | Donald Williamson | 17 | Son | — | Illinois |
| 45 | Irene Williamson | 16 | Daughter | — | Illinois |
| 46 | Ruth Williamson | 15 | Daughter | — | Illinois |
| 47 | James Williamson THIS PERSON | 12 | Son | — | Illinois |
| 48 | Eugene Williamson | 9 | Son | — | Illinois |
| 49 | Marie Williamson | 8 | Daughter | — | Illinois |
| 50 | Doris Williamson | 4 | Daughter | — | Illinois |
| 51 | Thomas Mcdowell | 71 | Head | Labor | Illinois |
| 52 | Nora Mcdowell | 68 | Wife | — | Illinois |
| 53 | Thomas E. Mccune | 70 | Head | — | Penn |
| 54 | Alice E. Mccune | 67 | Wife | — | Penn |
| 55 | Grace Bacon | 69 | Head | — | Missouri |
| 56 | Frank Bacon | 47 | Son | Electrical Eng. | Illinois |
| 57 | Eva Bacon | 38 | Daughter-in-law | Beauty Operator | Illinois |
| 58 | Abraham Smith | 64 | Head | — | England |
| 59 | Frank Dixon | 69 | Head | Carpenter | Illinois |
| 60 | Ella Dixon | 64 | Wife | — | Illinois |
| 61 | Harley Nelson | 36 | Head | — | Illinois |
| 62 | Ethel Nelson | 28 | Wife | — | Illinois |
| 63 | James Nelson | 2 | Son | — | Illinois |
| 64 | William Doran | 26 | Head | Pressman | Illinois |
| 65 | Delores Doran | 25 | Wife | — | Illinois |
| 66 | Charles Skaggs | 33 | Brother-in-law | Carpenter | Illinois |
| 67 | Donald Theobald | 32 | Head | Producer | Illinois |
| 68 | Harold Kent | 31 | Head | Inspector | New York |
| 69 | Ethel Kent | 32 | Wife | — | Illinois |
| 70 | Barbara Kent | 3 | Daughter | — | Illinois |
| 71 | Jessie Kent | 60 | Father | — | Illinois |
| 72 | Ralph Townsley | 50 | Head | Engineer | Illinois |
| 73 | Ethel Townsley | 46 | Wife | — | Illinois |
| 74 | Black | None | — | — | — |
| 75 | John Benn | 70 | Head | Proprietor | Illinois |
| 76 | Bird Clara Benn | 46 | Housekeeper | Domestic | Illinois |
| 77 | Bernice Thomas | 26 | Lodger | — | Illinois |
| 78 | George Alton | 30 | Head | Labor | Iowa |
| 79 | Rosella Alton | 27 | Wife | — | S. Dakota |
| 80 | Maxine Alton | 5 | Daughter | — | S. Dakota |
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)