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Robert Gardner — 1940 US Census Record
Linked across censuses1940 United States Federal Census · San-Diego-County, California
Our Model Tree links this Robert Gardner across the 1920, 1930 and 1940 US Censuses in San-Diego-County, California (XGBoost, ~Confirmed) — first a head (b.~1888), then head of a 4-person household.
Age 52
b. ~1888
Male
Head
Born: Nebraska
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Diego-County, California |
| Surname | Gardner |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Nebraska |
| 1935 Residence (City) | San Diego |
| 1935 Residence (County) | San Diego |
| Additional Details | |
| Occupation | Optometrist |
| Industry | Own Office |
| Class of Worker | OA |
| Hours Worked | 54 |
| Income (1939) | 5000 |
| Highest Grade | H 4 |
| 1935 Residence | Same Place |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
| Occupation | Optometrist |
| Township / Ward | San Diego |
| Est. Birth Year | ~1888 |
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 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Edith Gardner | Spouse | — | 53 | ~1887 |
| Mary Gardner | Daughter | — | 22 | ~1918 |
| Robert Gardner | Head | — | 52 | ~1888 |
| Robert Gardner | Son | — | 21 | ~1919 |
Census Appearances
1920
San Diego, …
Head, age 31
San Diego, California · implied b. ~1889 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gardner |
| Given Name | Robert I |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Nebraska |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Pennsylvania |
| Occupation | Optician |
| Industry | Office practice |
| Class of Worker | Emp |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
1930
San Diego, …
Head, age 41
San Diego, California · implied b. ~1889 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gardner |
| Given Name | Robert T |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Nebraska |
| Age at First Marriage | 26 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Illinois |
| Occupation | Upholsterer |
| Industry | Independent |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 10000 |
| Radio Set | R |
| Veteran | No |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
1940
San-Diego-County, California
Head, age 52
San-Diego-County, California · implied b. ~1888 — 4 household members
| Surname | Gardner |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Nebraska |
| 1935 Residence (City) | San Diego |
| 1935 Residence (County) | San Diego |
| Occupation | Optometrist |
| Industry | Own Office |
| Class of Worker | OA |
| Hours Worked | 54 |
| Income (1939) | 5000 |
| Highest Grade | H 4 |
| 1935 Residence | Same Place |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
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 Gardner across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Gardner
Head · 1940 · age 52 · b. ~1888 · 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-Diego-County, California
Open full size
1940 US Federal Census — San-Diego-County, California
Page Contents
5 people indexed on this census page (nara:1940:m-t0627-00448-00533)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Robert Gardner THIS PERSON | 52 | Head | Optometrist | Nebraska |
| 2 | Edith Gardner | 53 | Wife | — | Illinois |
| 3 | Robert Jr. Gardner | 21 | Son | — | California |
| 4 | Mary G. Gardner | 22 | Daughter | Asst Cashier | California |
| 5 | Margaret Barnes Fay | 79 | Head | — | 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)