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Harold Davis — 1940 US Census Record
Model Tree available1940 United States Federal Census · Alameda-County, California
Our Model Tree links this Harold Davis across the 1920, 1930 and 1940 US Censuses in Alameda-County, California (XGBoost, ~Confirmed), with identified parents Morris & Lydia — first a son (b.~1915), then head of a 5-person household.
Age 25
b. ~1915
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Alameda-County, California |
| Surname | Davis |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Oakland City |
| 1935 Residence (County) | Alameda |
| Additional Details | |
| Occupation | Electrician helper |
| Industry | Ship yard |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1008 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Electrician Helper |
| Township / Ward | Oakland City |
| Est. Birth Year | ~1915 |
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 Harold | Age | Birth yr |
|---|---|---|---|---|
| Irene Davis | Daughter | — | 14 | ~1926 |
| Joseph Davis | Head | — | 55 | ~1885 |
| Ernest Davis | Son | — | 24 | ~1916 |
| Harold Davis | Son | — | 25 | ~1915 |
| Mary Davis | Spouse | — | 52 | ~1888 |
Census Appearances
Son, age 4
Alameda, California · implied b. ~1916 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Henry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Hungary |
| Mother's Birthplace | Hungary |
| Occupation | none |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
Son, age 15
Alameda, California · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Hungary |
| Mother's Birthplace | Hungary |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Alameda-County, California
Son, age 25
Alameda-County, California · implied b. ~1915 — 5 household members
| Surname | Davis |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Oakland City |
| 1935 Residence (County) | Alameda |
| Occupation | Electrician helper |
| Industry | Ship yard |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1008 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 Morris Davis (~0.92 confidence) and mother Lydia Davis (~0.92 confidence) and father Joseph Davis (~0.92 confidence) and mother Julia Davis (~0.92 confidence) and mother Mary Davis (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Morris Davis
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Lydia Davis
b. ~1884
Source mother
● Household
· direct · ~0.92
Father
Joseph Davis
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Julia Davis
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Mary Davis
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Davis
Son · 1940 · age 25 · b. ~1915 · California
★ You are viewing this record
Sibling
Irene Davis
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ernest Davis
Sibling · 1940 · age 24
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 — Alameda-County, California
Open full size
1940 US Federal Census — Alameda-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00435-00506)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Howard Pressey | 65 | Head | — | California |
| 2 | Kenneth Pressey | 45 | Son | — | California |
| 3 | William Pressey | 28 | Son | — | California |
| 4 | Daniel Pressey | 11 | Son | — | California |
| 5 | Joseph Davis | 55 | Head | Moulder Helper | Hawaii |
| 6 | Mary Davis | 52 | Wife | — | Hawaii |
| 7 | Harold Davis THIS PERSON | 25 | Son | Electrician Helper | California |
| 8 | Ernest Davis | 24 | Son | Chipper | California |
| 9 | Irene Davis | 14 | Daughter | — | California |
| 10 | John Painter | 54 | Head | — | California |
| 11 | Henrietta Painter | 59 | Wife | — | Illinois |
| 12 | Walter Stangel | 31 | Head | Service Man | Illinois |
| 13 | Clara Stangel | 28 | Wife | — | Missouri |
| 14 | Patricia Stangel | 3 | Daughter | — | California |
| 15 | Harry Stangel | 2 | Son | — | California |
| 16 | George Meyer | 31 | Head | Radio Tube Laborer | New York |
| 17 | Melba Meyer | 31 | Wife | — | Oregon |
| 18 | Roberta Meyer | 4 | Daughter | — | California |
| 19 | Martin Hardak | 32 | Head | Moulder | Ohio |
| 20 | Lucille Hardak | 29 | Wife | — | California |
| 21 | Vittorio Giulia | 49 | Head | Curtain Cleaner | Italy |
| 22 | Ernest Giulia | 13 | Son | — | California |
| 23 | Leslie Lewis | 37 | Head | Gen. Laborer | Indiana |
| 24 | Edna Lewis | 39 | Wife | — | California |
| 25 | Frederick Speck | 51 | Head | Tile Setter | Kansas |
| 26 | Helen Speck | 49 | Wife | — | California |
| 27 | Dorothy Speck | 24 | Daughter | Glass Decorator | California |
| 28 | Frederick Speck | 23 | Son | Tile Setter | California |
| 29 | Edward Speck | 19 | Son | Textile Worker | California |
| 30 | Merle Speck | 13 | Daughter | — | California |
| 31 | Robert Speck | 9 | Son | — | California |
| 32 | Edward Jewell | 48 | Head | Machinist | Illinois |
| 33 | Mildred Jewell | 44 | Wife | — | California |
| 34 | Edward Jr. Jewell | 22 | Son | Learner | California |
| 35 | Joseph Rodrigues | 49 | Head | Cement Cont. | Portugal |
| 36 | Matilda Rodrigues | 43 | Wife | — | Portugal |
| 37 | Margaret Lawrence | 61 | Head | — | California |
| 38 | Silver Lawrence | 44 | Sister | Saleslady | California |
| 39 | Margaret Lawrence | 16 | Niece | — | California |
| 40 | Charlie Quilt | 37 | Head | Auto Mechanic | Missouri |
Related Census Records
Pedigree Summary
Harold + 2 siblings
Gen 1 · 5 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)