JW
James Williamson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Dekalb-County, Illinois
Our Model Tree links this James Williamson across the 1930 and 1940 US Censuses in Dekalb-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 12-person household.
Age 14
b. ~1926
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Dekalb-County, Illinois |
| Surname | Williamson |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Sycamore City |
| 1935 Residence (County) | De Kalb |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Sycamore City |
| Est. Birth Year | ~1926 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Nellie Williamson | Daughter | — | 17 | ~1923 |
| Ruth Williamson | Daughter | — | 16 | ~1924 |
| Geraldine Williamson | Daughter | — | 7 | ~1933 |
| Flora Williamson | Daughter | — | 9 | ~1931 |
| Margaret Williamson | Daughter | — | 13 | ~1927 |
| Esther Williamson | Daughter | — | 12 | ~1928 |
| Rochel Williamson | Head | — | 47 | ~1893 |
| James Williamson | Son | — | 11 | ~1929 |
| Paul Williamson | Son | — | 5 | ~1935 |
| George Williamson | Son | — | 30 | ~1910 |
| James Williamson | Son | — | 14 | ~1926 |
| Nellie Williamson | Spouse | — | 40 | ~1900 |
Census Appearances
1930
Dekalb, Illinois
Son, age 4
Dekalb, Illinois · implied b. ~1926 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williamson |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Dekalb-County, Illinois
Son, age 14
Dekalb-County, Illinois · implied b. ~1926 — 12 household members
| Surname | Williamson |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Sycamore City |
| 1935 Residence (County) | De Kalb |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| 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 14 · b. ~1926 · Illinois
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Sibling
Flora Williamson
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Williamson
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Williamson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Williamson
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Esther Williamson
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Williamson
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nellie Williamson
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Geraldine Williamson
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Williamson
Sibling · 1940 · age 30
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 — Dekalb-County, Illinois
Open full size
1940 US Federal Census — Dekalb-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00793-00129)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary H. Florian | 50 | Wife | Waitress | Illinois |
| 42 | Donald J. Florian | 20 | Son | Clerk | Illinois |
| 43 | Vance Aneriste | 49 | Head | Installation | Missouri |
| 44 | Mayme Aneriste | 49 | Wife | — | Wisconsin |
| 45 | Kathleen Hallmark | 26 | Niece | Bookkeeper | Illinois |
| 46 | Rochel Williamson | 47 | Head | Odd Jobs | Illinois |
| 47 | Nellie Williamson | 40 | Wife | — | Indiana |
| 48 | George Williamson | 30 | Son | New Worker | Indiana |
| 49 | James Williamson | 11 | Son | — | Illinois |
| 50 | Nellie Williamson | 17 | Daughter | — | Illinois |
| 51 | Ruth Williamson | 16 | Daughter | — | Illinois |
| 52 | James Williamson THIS PERSON | 14 | Son | — | Illinois |
| 53 | Margaret Williamson | 13 | Daughter | — | Illinois |
| 54 | Esther Williamson | 12 | Daughter | — | Illinois |
| 55 | Flora Williamson | 9 | Daughter | — | Illinois |
| 56 | Geraldine Williamson | 7 | Daughter | — | Illinois |
| 57 | Paul Williamson | 5 | Son | — | Illinois |
| 58 | H. M. Organ | 47 | Head | Laborer | Illinois |
| 59 | Genevieve Organ | 40 | Wife | — | Illinois |
| 60 | Marjorie Organ | 20 | Daughter | — | Idaho |
| 61 | Marian Puppett | 24 | Head | Waitress | Illinois |
| 62 | Newton Thorvold | 55 | Head | Carpenter | Illinois |
| 63 | Anna Thorvold | 51 | Wife | Owner, Cook | W. Virginia |
| 64 | Robert Thorvold | 23 | Son | Strander | Illinois |
| 65 | Edgar Thorvold | 19 | Son | Office Clerk | Michigan |
| 66 | Theodore Thorvold | 16 | Son | — | Nebraska |
| 67 | Harry Campbell | 44 | Head | Manager Operator | Illinois |
| 68 | Ethel Campbell | 44 | Wife | — | Illinois |
| 69 | Mariana Campbell | 15 | Daughter | — | Illinois |
| 70 | Sally Campbell | 9 | Daughter | — | Illinois |
| 71 | John Fermond | 74 | Head | Real Estate | Ireland |
| 72 | Ellen Fermond | 66 | Wife | — | Illinois |
| 73 | George Fermond | 20 | Son | New Worker | Illinois |
| 74 | Mary Fermond | 18 | Daughter | — | Illinois |
| 75 | Jr. John Fermond | 17 | Son | — | Illinois |
| 76 | B. Jane Faisler | 69 | Head | — | Illinois |
| 77 | Ernest Spohn | 43 | Head | Elect. Engineer | Illinois |
| 78 | Mildred Spohn | 43 | Wife | — | Iowa |
| 79 | Loren Spohn | 1 | Son | — | Illinois |
| 80 | Simon Robinson | 23 | Son | Bartender | Georgia |
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)