RD
Roy Davis — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Knox-County, Illinois
Our Model Tree links this Roy Davis across the 1920, 1930 and 1940 US Censuses in Knox-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1880), then head of a 3-person household.
Age 60
b. ~1880
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Knox-County, Illinois |
| Surname | Davis |
| Given Name | Roy |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Elba twp |
| 1935 Residence (County) | Knox |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 84 |
| Income (1939) | 0 |
| Highest Grade | H-1 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Farmer |
| Township / Ward | Elba Twp |
| Est. Birth Year | ~1880 |
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 Roy | Age | Birth yr |
|---|---|---|---|---|
| Roy Davis | Head | — | 60 | ~1880 |
| Russell Davis | Son | — | 19 | ~1921 |
| Eva Davis | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Knox, Illinois
Head, age 40
Knox, Illinois · implied b. ~1880 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Roy |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Illinois |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Knox, Illinois
Head, age 50
Knox, Illinois · implied b. ~1880
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Davis |
| Given Name | Roy |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 26 |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | Farmer |
| Industry | Farm General |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Knox-County, Illinois
Head, age 60
Knox-County, Illinois · implied b. ~1880 — 3 household members
| Surname | Davis |
| Given Name | Roy |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Elba twp |
| 1935 Residence (County) | Knox |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 84 |
| Income (1939) | 0 |
| Highest Grade | H-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 Roy Davis across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Roy Davis
Head · 1940 · age 60 · b. ~1880 · 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 — Knox-County, Illinois
Open full size
1940 US Federal Census — Knox-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00826-00171)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Earl Dalton | 58 | Head | Farmer | Illinois |
| 2 | Rose Halt | 62 | Housekeeper | Housekeeper | Illinois |
| 3 | Newton Dalton | 60 | Head | Farmer | Illinois |
| 4 | Irene Dalton | 60 | Wife | — | Ohio |
| 5 | Bertha Dalton | 32 | Daughter | Teacher | Illinois |
| 6 | Wayne Bird | 28 | Head | Farm Laborer | Illinois |
| 7 | Frances Bird | 28 | Wife | — | Illinois |
| 8 | Carlyle Bird | 8 | Son | — | Illinois |
| 9 | Darlene Bird | 5 | Daughter | — | Illinois |
| 10 | John Adams | 77 | Head | Farmer | Illinois |
| 11 | R. B. Adams | 42 | Head | — | Illinois |
| 12 | Lucile Adams | 37 | Wife | — | Illinois |
| 13 | Helen Adams | 18 | Daughter | — | Illinois |
| 14 | Beverly Adams | 12 | Daughter | — | Illinois |
| 15 | Effie Summers | 65 | Mother | — | Illinois |
| 16 | Lloyd Dalton | 20 | Head | — | Illinois |
| 17 | Louise Dalton | 15 | Wife | — | Illinois |
| 18 | Raymond Behringer | 36 | Head | Farmer | Illinois |
| 19 | Mildred Behringer | 27 | Wife | — | Illinois |
| 20 | Herman Behringer | 73 | Father | — | Germany |
| 21 | Lloyd Behringer | 27 | Brother | — | Illinois |
| 22 | Guy Davis | 31 | Head | Farmer | Illinois |
| 23 | Bernice Davis | 34 | Wife | — | Illinois |
| 24 | Bonnie Jean Davis | 2 | Daughter | — | Illinois |
| 25 | Roy Davis THIS PERSON | 60 | Head | Farmer | Illinois |
| 26 | Eva Davis | 57 | Wife | — | Illinois |
| 27 | Russell Davis | 19 | Son | Farm Laborer | Illinois |
| 28 | Herman Nelson | 53 | Head | Farmer | Illinois |
| 29 | June Nelson | 52 | Wife | — | Illinois |
| 30 | James Nelson | 1 | Son | — | Illinois |
| 31 | Mark Nelson | 21 | Son | — | Illinois |
| 32 | Clarence Emerick | 33 | Head | New Worker | Illinois |
| 33 | Floella Emerick | 30 | Wife | — | Missouri |
| 34 | Mary Emerick | 5 | Daughter | — | Illinois |
| 35 | Martha Emerick | 3 | Daughter | — | Illinois |
| 36 | Clarelle Emerick | 1 | Daughter | — | Illinois |
| 37 | Betty Emerick | 1 | Daughter | — | Illinois |
| 38 | Perry Thomas | 44 | Head | Farmer | Illinois |
| 39 | Violet Thomas | 37 | Wife | — | Illinois |
| 40 | Ethel Mae Thomas | 16 | Daughter | — | 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)