DD
Donald Davis — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Illinois
Our Model Tree links this Donald Davis across the 1920, 1930 and 1940 US Censuses in Marion-County, Illinois (XGBoost, ~Confirmed), with identified parents Charles & Charley — first a son (b.~1917), then head of a 5-person household.
Age 23
b. ~1917
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Illinois |
| Surname | Davis |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Salem City |
| Additional Details | |
| Occupation | Assistant |
| Industry | Hospital |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 496 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Assistant |
| Township / Ward | Salem City |
| Est. Birth Year | ~1917 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Donald | Age | Birth yr |
|---|---|---|---|---|
| Charley Davis | Head | — | 63 | ~1877 |
| Donald Davis | Son | — | 23 | ~1917 |
| Eugene Davis | Son | — | 28 | ~1912 |
| Joel Davis | Son | — | 30 | ~1910 |
| Iva Davis | Spouse | — | 58 | ~1882 |
Census Appearances
1920
Marion, Illinois
Son, age 3
Marion, Illinois · implied b. ~1917 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Donald F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Marion, Illinois
Son, age 13
Marion, Illinois · implied b. ~1917 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Marion-County, Illinois
Son, age 23
Marion-County, Illinois · implied b. ~1917 — 5 household members
| Surname | Davis |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Salem City |
| Occupation | Assistant |
| Industry | Hospital |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 496 |
| Highest Grade | H 4 |
| 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 Donald Davis across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Davis (~0.92 confidence) and father Charley Davis (~0.92 confidence) and father Charles Davis (~0.92 confidence) and mother Dora Davis (~0.92 confidence) and mother Iva Davis (~0.92 confidence) and mother Iva Davis (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Davis
b. ~1856
Source father
● Household
· direct · ~0.92
Father
Charley Davis
b. ~1877
Source father
● Household
· direct · ~0.92
Father
Charles Davis
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Dora Davis
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Iva Davis
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Iva Davis
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Donald Davis
Son · 1940 · age 23 · b. ~1917 · Illinois
★ You are viewing this record
Sibling
Joel Davis
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugene Davis
Sibling · 1940 · age 28
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 — Marion-County, Illinois
Open full size
1940 US Federal Census — Marion-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00853-00263)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Haller R Hogue | 44 | Head | Driller | Louisville |
| 2 | Hattie R Hogue | 40 | Wife | — | Louisville |
| 3 | Pauline Hogue | 17 | Dtr | — | Ohio |
| 4 | Oscar Reed | 59 | Head | Conductor | Illinois |
| 5 | Kathryne Reed | 54 | Wife | — | Kentucky |
| 6 | Mary E Reed | 29 | Dtr | Secretary | Colorado |
| 7 | Charles C Reed | 25 | Son | Office Manager | Indiana |
| 8 | Dorothy Reed | 19 | Dtr | Office Work | Indiana |
| 9 | Scott Leon Reed | 23 | Lodger | Surveying | Salem |
| 10 | William Wright | 38 | Head | Store Manager | Arkansas |
| 11 | Pearl O Wright | 32 | Wife | — | Oklahoma |
| 12 | Robert Wright | 4 | Son | — | Oklahoma |
| 13 | Joyce Ann Wright | 6 | Dtr | — | Oklahoma |
| 14 | William Jr Wright | 2 | Son | — | Texas |
| 15 | John Stanley Wright | 0 | Son | — | Centralia |
| 16 | Bee Ellis | 47 | Lodger | Design Engineer | Kansas |
| 17 | Thelma Beard | 16 | Lodger | Office Work | Illinois |
| 18 | O. A. James | 53 | Head | Manager | Illinois |
| 19 | Esther James | 53 | Wife | Saleslady | Illinois |
| 20 | Lavon Dealer | 23 | House Keeper | House Work | Oklahoma |
| 21 | Arthur C Stewart | 50 | Head | Lumber Manager | Mt Vernon |
| 22 | Lettie R Stewart | 48 | Wife | — | Illinois |
| 23 | Eugene C Bromley | 31 | Head | Driller | Illinois |
| 24 | Margrite Bromley | 29 | Wife | Operator | Texas |
| 25 | Fred S Henry | 24 | Head | Pumper | Oklahoma |
| 26 | Lula Lee Henry | 24 | Wife | Operator | Oklahoma |
| 27 | Aubrey F Broyles | 22 | Head | Roughneck | Texas |
| 28 | Louise Broyles | 19 | Wife | — | Louisiana |
| 29 | Charley Davis | 63 | Head | Engineer | Illinois |
| 30 | Iva Davis | 58 | Wife | — | Illinois |
| 31 | Joel Davis | 30 | Son | — | Illinois |
| 32 | Eugene Davis | 28 | Son | Bookkeeper | Illinois |
| 33 | Donald Davis THIS PERSON | 23 | Son | Assistant | Illinois |
| 34 | Ward O Holt | 40 | Head | Atty | Illinois |
| 35 | Margaret Holt | 33 | Wife | — | Kansas |
| 36 | Joanne Holt | 10 | Dtr | — | Centralia |
| 37 | Louis C Gruenkemeyer | 50 | Head | Foreman | St Louis |
| 38 | Florence C Gruenkemeyer | 43 | Wife | — | St Louis |
| 39 | Howard Gruenkemeyer | 15 | Son | — | St Louis |
| 40 | Norma Jean Gruenkemeyer | 13 | Dtr | — | Salem |
Pedigree Summary
Donald + 2 siblings
Gen 1 · 6 parents
~0.92
Max depth 4 (1900–1950 window)
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)