HD
Harold Davis — 1930 US Census Record
Model Tree available1930 United States Federal Census · San Francisco, California
Our Model Tree links this Harold Davis across the 1910, 1920 and 1930 US Censuses in San Francisco, California (XGBoost, ~Confirmed), with identified parents Elizabeth & James — first a son (b.~1908), then head of a 4-person household.
Age 22
b. ~1908
Male
Son
Born: California
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | San Francisco, California |
| Surname | Davis |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Additional Details | |
| Occupation | Sheet metal |
| Industry | Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Sheet Metal |
| Township / Ward | San Francisco City |
| Est. Birth Year | ~1908 |
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.
4 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Harold | Age | Birth yr |
|---|---|---|---|---|
| James Davis | Head | — | 49 | ~1881 |
| David Davis | Son | — | 21 | ~1909 |
| Harold Davis | Son | — | 22 | ~1908 |
| Elizabeth Davis | Spouse | — | 50 | ~1880 |
Census Appearances
1910
San Francisco, …
Son, age 2
San Francisco, California · implied b. ~1908 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Harold J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Occupation | none |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1920
San Francisco, …
Son, age 12
San Francisco, California · implied b. ~1908 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Harold J. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
San Francisco, …
Son, age 22
San Francisco, California · implied b. ~1908 — 4 household members
| Surname | Davis |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Occupation | Sheet metal |
| Industry | Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| 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 (1910, 1920 and 1930) in San Francisco, California, using XGBoost record linkage. Identified parents: mother Elizabeth Davis (~0.92 confidence) and father James Davis (~0.92 confidence) and father James Davis (~0.92 confidence) and mother Elizabeth Davis (~0.92 confidence) and father James Davis (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Elizabeth Davis
b. ~1874
Source mother
● Household
· direct · ~0.92
Father
James Davis
b. ~1876
Source father
● Household
· direct · ~0.92
Father
James Davis
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Davis
b. ~1880
Source mother
● Household
· direct · ~0.92
Father
James Davis
b. ~1881
Source father
● Household
· direct · ~0.92
This person
Anchor record
Harold Davis
Son · 1930 · age 22 · b. ~1908 · California
★ You are viewing this record
Sibling
David Davis
Sibling · 1930 · age 21
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
1930 US Federal Census — San Francisco, California
Open full size
1930 US Federal Census — San Francisco, California
Page Contents
7 people indexed on this census page (ia:1930:californiacensus00reel197:0969)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | John Corrigan | 63 | H | — | Ireland |
| 52 | Corrigan | None | — | — | — |
| 53 | John A. Mord | 56 | Head | Painter | Sweden |
| 54 | James J. Davis | 49 | Head | Street Repair | California |
| 55 | Elizabeth Davis | 50 | Wife | Home | California |
| 56 | Harold Davis THIS PERSON | 22 | Son | Sheet Metal | California |
| 57 | David Davis | 21 | Son | Driver | California |
Related Census Records
Pedigree Summary
Harold + 1 sibling
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 1930 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)