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William Dunlap — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jersey-County, Illinois
Our Model Tree links this William Dunlap across the 1920, 1930 and 1940 US Censuses in Jersey-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1856), then head of a 3-person household.
Age 84
b. ~1856
Male
Head
Born: Ohio
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Jersey-County, Illinois |
| Surname | Dunlap |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 84 |
| Marital Status | Widowed |
| Birthplace | Ohio |
| 1935 Residence (City) | Grafton City |
| 1935 Residence (County) | Jersey |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Grafton City |
| Est. Birth Year | ~1856 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Dunlap | Head | — | 84 | ~1856 |
| Frank Dunlap | Son | — | 44 | ~1896 |
| Rosie West | Other | — | 74 | ~1866 |
Census Appearances
1920
Jersey, Illinois
Head, age 64
Jersey, Illinois · implied b. ~1856 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dunlope |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | Laborer |
| Industry | Powder Mill |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Jersey, Illinois
Head, age 74
Jersey, Illinois · implied b. ~1856 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dunlope |
| Given Name | William G |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 74 |
| Marital Status | Married |
| Birthplace | Ohio |
| Age at First Marriage | 26 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | New Jersey |
| Can Read/Write | Yes |
| Home Owned/Rented | Yes |
| Radio Set | O |
| Veteran | 1 |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Jersey-County, Illinois
Head, age 84
Jersey-County, Illinois · implied b. ~1856 — 3 household members
| Surname | Dunlap |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 84 |
| Marital Status | Widowed |
| Birthplace | Ohio |
| 1935 Residence (City) | Grafton City |
| 1935 Residence (County) | Jersey |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 William Dunlap across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
William Dunlap
Head · 1940 · age 84 · b. ~1856 · Illinois
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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 — Jersey-County, Illinois
Open full size
1940 US Federal Census — Jersey-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00817-00316)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Edna Rotcher | 32 | Wife | Teacher | Missouri |
| 42 | James Denton | 72 | Head | Fisherman | Illinois |
| 43 | Alva Wallace | 54 | Head | Truck Driver | Illinois |
| 44 | Birdie Wallace | 54 | Wife | — | Illinois |
| 45 | Charlotte Wallace | 18 | Daughter | — | Illinois |
| 46 | Donald Wallace | 15 | Son | — | Illinois |
| 47 | Charles J. Gipprich | 55 | Head | Bookkeeper | Illinois |
| 48 | Rita Gipprich | 40 | Wife | — | Illinois |
| 49 | Charles W. Gipprich | 14 | Son | — | Illinois |
| 50 | Lois Gipprich | 10 | Son | — | Illinois |
| 51 | Mary K. Gipprich | 5 | Daughter | — | Illinois |
| 52 | Dorothy Garfield | 23 | Head | Gen. Mdse Store | Kansas |
| 53 | Litaura Hudson | 23 | Sister-in-law | Tunnel Mdse Store | Illinois |
| 54 | Mary L. L. | 27 | Daughter | Beauty Operator | Illinois |
| 55 | Grandson Phillis | None | M | — | — |
| 56 | William Dunlap THIS PERSON | 84 | Head | — | Ohio |
| 57 | Frank Dunlap | 44 | Son | Truck Driver | Illinois |
| 58 | Rosie West | 74 | Sister-in-law | — | Illinois |
| 59 | Alvin Knight | 29 | Head | Common Laborer | Illinois |
| 60 | Jenelva Knight | 25 | Wife | — | Illinois |
| 61 | Patricia Knight | 8 | Daughter | — | Illinois |
| 62 | Alvin C. Knight | 4 | Son | — | Illinois |
| 63 | Dellie Knight | 2 | Son | — | Illinois |
| 64 | Betty J. Knight | 1 | Son | — | Illinois |
| 65 | William J. Britt | 63 | Head | — | Illinois |
| 66 | Emma Britt | 54 | Wife | — | Illinois |
| 67 | Bert Britt | 22 | Son | New Worker | Illinois |
| 68 | Edward Britt | 14 | Son | — | Illinois |
| 69 | James Britt | 25 | Son | Fireman | Illinois |
| 70 | Opal Britt | 5 | Granddaughter | — | Illinois |
| 71 | Charles J. Britt | 3 | Grandson | — | Illinois |
| 72 | Barbara A. Britt | 1 | Granddaughter | — | Illinois |
| 73 | Louis Kater | 34 | Head | Repair-Man | Missouri |
| 74 | Verna Kater | 32 | Wife | — | Illinois |
| 75 | Leroy Kater | 14 | Son | — | Missouri |
| 76 | Geraldine Kater | 12 | Daughter | — | Missouri |
| 77 | Charles Kater | 10 | Son | — | Illinois |
| 78 | Dolly Jean Kater | 6 | Daughter | — | Illinois |
| 79 | Patsy Kater | 4 | Daughter | — | Illinois |
| 80 | Donald Kater | 1 | 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)