JU
John Underwood — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Vermilion-County, Illinois
Our Model Tree links this John Underwood across the 1930 and 1940 US Censuses in Vermilion-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 9-person household.
Age 15
b. ~1925
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Vermilion-County, Illinois |
| Surname | Underwood |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Jamaica Township |
| 1935 Residence (County) | Vermilion |
| Additional Details | |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 30 |
| Income (1939) | 0 |
| Highest Grade | Hs 1 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Laborer |
| Township / Ward | Jamaica Township |
| Est. Birth Year | ~1925 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Elma Underwood | Daughter | — | 8 | ~1932 |
| Edna Underwood | Daughter | — | 14 | ~1926 |
| Alva Underwood | Head | — | 49 | ~1891 |
| John Underwood | Son | — | 15 | ~1925 |
| Henry Underwood | Son | — | 3 | ~1937 |
| Mildred Underwood | Spouse | — | 37 | ~1903 |
| Ralph Underwood | Son | — | 5 | ~1935 |
| George Underwood | Son | — | 10 | ~1930 |
| Helen Underwood | Daughter | — | 7 | ~1933 |
Census Appearances
1930
Vermilion, Illinois
Son, age 5
Vermilion, Illinois · implied b. ~1925 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Underwood |
| Given Name | John A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Indiana |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Vermilion-County, Illinois
Son, age 15
Vermilion-County, Illinois · implied b. ~1925 — 9 household members
| Surname | Underwood |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Jamaica Township |
| 1935 Residence (County) | Vermilion |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 30 |
| Income (1939) | 0 |
| Highest Grade | Hs 1 |
| 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 John Underwood across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Underwood
Son · 1940 · age 15 · b. ~1925 · Illinois
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Sibling
Henry Underwood
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elma Underwood
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Underwood
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ralph Underwood
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edna Underwood
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Underwood
Sibling · 1940 · age 7
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 — Vermilion-County, Illinois
Open full size
1940 US Federal Census — Vermilion-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00899-00391)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Pearl Sconce | 43 | Wife | — | Illinois |
| 42 | Earl Drisler | 53 | Head | Farmer | Illinois |
| 43 | Flora B. Drisler | 52 | Wife | — | Illinois |
| 44 | John Lyle Drisler | 26 | Head | Farmer | Illinois |
| 45 | Blanche Drisler | 26 | Wife | — | Illinois |
| 46 | John Gardner Drisler | 1 | Son | — | Illinois |
| 47 | Ira Tranter | 45 | Head | Laborer | Indiana |
| 48 | Bessie A. Tranter | 35 | Wife | — | Indiana |
| 49 | Raymond Sanders | 46 | Head | Farmer | Illinois |
| 50 | Beulah Sanders | 40 | Wife | — | Illinois |
| 51 | Dean Krukwitt | 23 | Head | Farmer | Illinois |
| 52 | Betty Krukwitt | 21 | Wife | — | Illinois |
| 53 | Alva Underwood | 49 | Head | Farmer | Illinois |
| 54 | Mildred Underwood | 37 | Wife | — | Indiana |
| 55 | John Underwood THIS PERSON | 15 | Son | Laborer | Illinois |
| 56 | Edna Underwood | 14 | Daughter | — | Illinois |
| 57 | George Underwood | 10 | Son | — | Illinois |
| 58 | Elma Underwood | 8 | Daughter | — | Illinois |
| 59 | Helen Underwood | 7 | Daughter | — | Illinois |
| 60 | Ralph Underwood | 5 | Son | — | Illinois |
| 61 | Henry Underwood | 3 | Son | — | Illinois |
| 62 | Ira Miller | 24 | Head | Farmer | Illinois |
| 63 | Catherine A. Miller | 23 | Wife | — | Illinois |
| 64 | Ervin Ellsworth Shields | 26 | Head | Farmer | Illinois |
| 65 | Thelma Shields | 25 | Wife | — | Illinois |
| 66 | Ella Kerr | 59 | Head | Farmer | Illinois |
| 67 | Etta Kerr | 60 | Wife | — | Illinois |
| 68 | Russell Kerr | 36 | Nephew | Laborer | Illinois |
| 69 | Lemuel Brewer | 55 | Head | Farmer | Illinois |
| 70 | Edith Brewer | 46 | Wife | — | Illinois |
| 71 | John E. Brewer | 18 | Son | Laborer | Illinois |
| 72 | Lawson Owen | 31 | Head | Laborer | Illinois |
| 73 | Lena Owen | 30 | Wife | — | Texas |
| 74 | F. H. Mcnees | 52 | Head | Farmer | Illinois |
| 75 | Mariemyle Mcnees | 49 | Wife | — | Kentucky |
| 76 | Bonnie Marie Mcnees | 11 | Daughter | — | Illinois |
| 77 | Deloss Alexander | 29 | Son-in-law | Laborer | Illinois |
| 78 | Fern Alexander | 28 | Daughter | — | Illinois |
| 79 | Betty Jane Alexander | 5 | Grand Daughter | — | Illinois |
| 80 | Wm. Richard Alexander | 4 | Grand Son | — | 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)