RD
Robert Davidson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · San-Joaquin-County, California
Our Model Tree links this Robert Davidson across the 1920, 1930 and 1940 US Censuses in San-Joaquin-County, California (XGBoost, ~Confirmed) — first a head (b.~1882), then head of a 5-person household.
Age 58
b. ~1882
Male
Head
Born: Scotland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Joaquin-County, California |
| Surname | Davidson |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Stockton |
| 1935 Residence (County) | San Joaquin |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Bricklayer |
| Industry | Construction work |
| Class of Worker | PW |
| Hours Worked | 15 |
| Income (1939) | 240 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Bricklayer |
| Township / Ward | Stockton |
| Est. Birth Year | ~1882 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Davidson | Head | — | 58 | ~1882 |
| Norman Davidson | Son | — | 26 | ~1914 |
| Harold Moore | Other | — | 25 | ~1915 |
| William Davidson | Son | — | 19 | ~1921 |
| Anna Davidson | Spouse | — | 58 | ~1882 |
Census Appearances
1920
San Joaquin, …
Head, age 38
San Joaquin, California · implied b. ~1882 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Scotland |
| Year of Immigration | 1906 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Bricklayer |
| Industry | General |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Scotch |
| Home Owned/Rented | R |
| Birth Country | Scotland |
| Year of Naturalization | 1914 |
| Birthplace (normalized) | scotland |
1930
San Joaquin, …
Head, age 48
San Joaquin, California · implied b. ~1882 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1901 |
| Age at First Marriage | 21 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Bricklayer |
| Industry | Contractor |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 5,000 |
| Radio Set | R |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
San-Joaquin-County, California
Head, age 58
San-Joaquin-County, California · implied b. ~1882 — 5 household members
| Surname | Davidson |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Stockton |
| 1935 Residence (County) | San Joaquin |
| Naturalization Status | Naturalized |
| Occupation | Bricklayer |
| Industry | Construction work |
| Class of Worker | PW |
| Hours Worked | 15 |
| Income (1939) | 240 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 Robert Davidson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Davidson
Head · 1940 · age 58 · b. ~1882 · California
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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 — San-Joaquin-County, California
Open full size
1940 US Federal Census — San-Joaquin-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00325-00429)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Keiko Atoshi | 15 | Daughter | — | California |
| 2 | Yoshiko Atoshi | 12 | Daughter | — | California |
| 3 | Chieko Atoshi | 9 | Daughter | — | California |
| 4 | Mitsuyo Atoshi | 5 | Daughter | — | California |
| 5 | Woko Atoshi | 7 | Daughter | — | California |
| 6 | Ruth Atoshi | 3 | Daughter | — | California |
| 7 | Masako Atoshi | 2 | Daughter | — | California |
| 8 | Ernest Vincelet | 30 | Head | Laborer | California |
| 9 | Hilda Vincelet | 24 | Wife | — | California |
| 10 | Geraldine Vincelet | 1 | Daughter | — | California |
| 11 | Samuel H. Bauer | 46 | Head | Laborer | Oregon |
| 12 | Fred Greer | 70 | Head | — | California |
| 13 | Jefferson M. Greer | 54 | Brother | Laborer | California |
| 14 | Frank Roberts | 51 | Head | Truck Driver | Massachusetts |
| 15 | Peggy L. Roberts | 39 | Wife | — | California |
| 16 | John W. Roberts | 16 | Son | Paper Route | California |
| 17 | Rookard Ward | 20 | Lodger | Typing | California |
| 18 | Clara M. Roberts | 10 | Daughter | — | California |
| 19 | Joseph S. Black | 53 | Head | Concrete Mixer Operator | Georgia |
| 20 | Muriel Black | 44 | Wife | — | Kansas |
| 21 | Florence Black | 15 | Daughter | — | California |
| 22 | Joella Black | 10 | Daughter | — | California |
| 23 | Doris Black | 9 | Daughter | — | California |
| 24 | Marvin Black | 7 | Son | — | California |
| 25 | Morris Black | 6 | Son | — | California |
| 26 | Ronald Black | 2 | Son | — | California |
| 27 | Lawrence Stutchman | 36 | Head | Master Mechanic | California |
| 28 | Bernice E. Stutchman | 27 | Wife | — | California |
| 29 | Bonita L. Lelem | 9 | Lodger | — | California |
| 30 | Araemone Hurlbert | 24 | Head | Bartender | Iowa |
| 31 | Julia M. Hurlbert | 35 | Wife | — | Pennsylvania |
| 32 | Robert Davidson THIS PERSON | 58 | Head | Bricklayer | Scotland |
| 33 | Anna Davidson | 58 | Wife | — | Northern Ireland |
| 34 | Norman W. Davidson | 26 | Son | Can Inspector | California |
| 35 | William J. Davidson | 19 | Son | Paper Route | California |
| 36 | Harold Moore | 25 | Lodger | Meat Market | Oklahoma |
| 37 | Ellen L. Williamson | 68 | Head | — | Georgia |
| 38 | Lottie Battilana | 61 | Head | — | California |
| 39 | Joseph J. Battilana | 23 | Son | Owner | California |
| 40 | Jane Battilana | 20 | Daughter | Office Clerk | California |
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)