HD
Harold Davis — 1940 US Census Record
Model Tree available1940 United States Federal Census · Union-County, Illinois
Our Model Tree links this Harold Davis across the 1920, 1930 and 1940 US Censuses in Union-County, Illinois (XGBoost, ~Confirmed), with identified parents James & Emma — first a head (b.~1919), then head of a 3-person household.
Age 21
b. ~1919
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Union-County, Illinois |
| Surname | Davis |
| Given Name | Harold W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Union |
| Additional Details | |
| Occupation | Piece Worker |
| Industry | Vulcan Heel Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 496 |
| Highest Grade | H 1 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Piece Worker |
| Township / Ward | Balcom |
| Est. Birth Year | ~1919 |
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 Harold | Age | Birth yr |
|---|---|---|---|---|
| Harold Davis | Head | — | 21 | ~1919 |
| Allen Davis | Son | — | ~1940 | |
| Alva Davis | Spouse | — | 21 | ~1919 |
Census Appearances
1920
Union, Illinois
Son, age 1
Union, Illinois · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Harold W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Union, Illinois
Son, age 11
Union, Illinois · implied b. ~1919 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| 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
Union-County, Illinois
Head, age 21
Union-County, Illinois · implied b. ~1919 — 3 household members
| Surname | Davis |
| Given Name | Harold W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Union |
| Occupation | Piece Worker |
| Industry | Vulcan Heel Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 496 |
| Highest Grade | H 1 |
| 1935 Residence | Illinois |
| 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 Harold Davis across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Davis (~0.83 confidence) and mother Emma Davis (~0.83 confidence) and mother Louvina Davis (~0.83 confidence) and father Orlando Davis (~0.92 confidence) and mother Susie Davis (~0.92 confidence). The pedigree spans 2 generations with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.87
Father
James Davis
b. ~1842
Source father>father
● Household
· direct · ~0.83
Mother
Emma Davis
b. ~1843
Source father>mother
● Household
· direct · ~0.83
Mother
Louvina Davis
b. ~1843
Source father>mother
● Household
· direct · ~0.83
Father
Orlando Davis
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Susie Davis
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Davis
Head · 1940 · age 21 · b. ~1919 · Illinois
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Union-County, Illinois
Open full size
1940 US Federal Census — Union-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00896-00252)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jimmie F. Heller | 8 | Stepson | — | Illinois |
| 2 | Patty L. Heller | 5 | Daughter | — | Illinois |
| 3 | Larry D. Heller | 2 | Son | — | Illinois |
| 4 | Ruth Bland | 39 | Head | Operator | Kentucky |
| 5 | Robert Johnson | 56 | Lodger | Labor | Illinois |
| 6 | Monroe Nelson | 38 | Head | Labor | Illinois |
| 7 | Susie Nelson | 35 | Wife | — | Illinois |
| 8 | James Nelson | 14 | Son | — | Illinois |
| 9 | Minnie Davis | 58 | Head | — | Illinois |
| 10 | Owen St. John | 28 | Head | Labor | Illinois |
| 11 | Ruth St. John | 19 | Wife | — | Illinois |
| 12 | Orlando Davis | 61 | Head | Operator | Illinois |
| 13 | Susan Davis | 52 | Wife | — | Illinois |
| 14 | Mary Davis | 19 | Daughter | Piece Worker | Illinois |
| 15 | Georgia Davis | 18 | Daughter | — | Illinois |
| 16 | Margaret Davis | 14 | Daughter | — | Illinois |
| 17 | Owen Davis | 12 | Son | — | Illinois |
| 18 | Thomas Burns | 40 | Head | — | Illinois |
| 19 | Della Burns | 41 | Wife | Housekeeping Aid | Illinois |
| 20 | Harold W. Davis THIS PERSON | 21 | Head | Piece Worker | Illinois |
| 21 | Alva Davis | 21 | Wife | Piece Worker | Illinois |
| 22 | Allen Bryant Davis | 0 | Son | — | Illinois |
| 23 | Van T. Marrow | 28 | Head | Labor | Illinois |
| 24 | Nina Marrow | 26 | Wife | — | Illinois |
| 25 | Alice C. Marrow | 5 | Daughter | — | Illinois |
| 26 | Robert D. Marrow | 1 | Son | — | Illinois |
| 27 | William A. Dale | 65 | Head | Operator | Illinois |
| 28 | Alice C. Dale | 65 | Wife | — | Illinois |
| 29 | William H. Dale | 25 | Son | Labor | Illinois |
| 30 | Warren Dale | 19 | Son | Labor | Illinois |
| 31 | Andrew Nordmeyer | 52 | Head | Carpenter | Illinois |
| 32 | Lillie Nordmeyer | 56 | Wife | — | Illinois |
| 33 | Lewis Nordmeyer | 54 | Head | Carpenter | Illinois |
| 34 | Nezille Nordmeyer | 57 | Wife | — | Illinois |
| 35 | Kenneth Nordmeyer | 12 | Daughter | — | Illinois |
| 36 | Robert Robert Gibbs | 32 | Head | Labor | Illinois |
| 37 | Margaret Robert Gibbs | 32 | Wife | — | Illinois |
| 38 | Jerry Robert Gibbs | 7 | Son | — | Illinois |
| 39 | Betty Lou Robert Gibbs | 5 | Daughter | — | Illinois |
| 40 | Hugo Peters | 54 | Head | Labor | Illinois |
Pedigree Summary
Harold
Gen 1 · 2 parents
~0.92
Gen 2 · 3 grandparents
~0.83
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)