RC
Robert Cox — 1940 US Census Record
Model Tree available1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this Robert Cox across the 1920, 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed), with identified parents Elizabeth & William — first a son (b.~1914), then head of a 6-person household.
Age 26
b. ~1914
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | Cox |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Additional Details | |
| Occupation | Salesman |
| Industry | Wholesale Tobacco |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1664 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Salesman |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1914 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Cox | Daughter | — | 23 | ~1917 |
| Janet Cox | Daughter | — | 11 | ~1929 |
| Elizabeth Cox | Head | — | 49 | ~1891 |
| Catherine Mccaffrey | Other | — | 84 | ~1856 |
| William Cox | Son | — | 20 | ~1920 |
| Robert Cox | Son | — | 26 | ~1914 |
Census Appearances
1920
San Francisco, …
Son, age 6
San Francisco, California · implied b. ~1914 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
San Francisco, …
Son, age 16
San Francisco, California · implied b. ~1914 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | Robert A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Son, age 26
San-Francisco-County, California · implied b. ~1914 — 6 household members
| Surname | Cox |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Occupation | Salesman |
| Industry | Wholesale Tobacco |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1664 |
| 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 Robert Cox across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Elizabeth Cox (~0.92 confidence) and father William Cox (~0.92 confidence) and father William Cox (~0.92 confidence) and mother Elizabeth Cox (~0.92 confidence) and mother Elizabeth Cox (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Elizabeth Cox
b. ~1879
Source mother
● Household
· direct · ~0.92
Father
William Cox
b. ~1879
Source father
● Household
· direct · ~0.92
Father
William Cox
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Cox
b. ~1891
Source mother
● Household
· direct · ~0.92
Mother
Elizabeth Cox
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Cox
Son · 1940 · age 26 · b. ~1914 · California
★ You are viewing this record
Sibling
Dorothy Cox
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Janet Cox
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Cox
Sibling · 1940 · age 20
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 — San-Francisco-County, California
Open full size
1940 US Federal Census — San-Francisco-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00322-00237)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edith Werner | 23 | Daughter | Secretary | California |
| 2 | Elizabeth Cox | 49 | Head | — | California |
| 3 | Robert Cox THIS PERSON | 26 | Son | Salesman | California |
| 4 | Dorothy Cox | 23 | Daughter | Technician | California |
| 5 | William Cox | 20 | Son | — | California |
| 6 | Janet Cox | 11 | Daughter | — | California |
| 7 | Catherine Mccaffrey | 84 | Mother | — | Irish Free State |
| 8 | Julian Lauray | 62 | Head | Printer | France |
| 9 | Eulalie Lauray | 58 | Wife | — | France |
| 10 | Albert Lescher | 46 | Head | Pharmacist | New York |
| 11 | Mary Lescher | 41 | Wife | — | New York |
| 12 | Jack Lescher | 12 | Son | — | California |
| 13 | Oma Devries | 47 | Head | Roomers | Nebraska |
| 14 | Helen Devries | 21 | Daughter | Office Work | Oregon |
| 15 | Allen Forsberg | 36 | Roomer | Electrician | New York |
| 16 | Ralph Forsberg | 9 | Son-Roomer | — | Washington |
| 17 | Vesta Santoro | 34 | Roomer | Fitter | California |
| 18 | Dias Domingo | 21 | Roomer | No Trade | Calif. |
| 19 | August Olivia | 57 | Head | Waiter | France |
| 20 | Blida Olivia | 55 | Wife | — | France |
| 21 | Adrian Taggart | 28 | Roomer | Salesman | California |
| 22 | Martha Taggart | 26 | Daughter | — | California |
| 23 | Rene Dubonnet | 66 | Head | — | France |
| 24 | Margaret Dubonnet | 58 | Wife | — | California |
| 25 | Ralph Dubonnet | 24 | Son | Machinist | California |
| 26 | Yvonne Dubonnet | 27 | Daughter | Bookkeeper | California |
| 27 | Otto Denhard | 68 | Head | — | California |
| 28 | Ida Denhard | 60 | Wife | — | California |
| 29 | Elma Denhard | 34 | Daughter | Secretary | California |
| 30 | Marie Edwards | 34 | Head | — | Missouri |
| 31 | John Glasgow | 39 | Head | Barber | Oklahoma |
| 32 | Rose Glasgow | 36 | Sister | Waitress | Nebraska |
| 33 | Henry Schmely | 70 | Head | — | California |
| 34 | Grace Schmely | 65 | Wife | — | California |
| 35 | Patrick Jenkins | 42 | Head | Owner | Irish Free State |
| 36 | Ellen Jenkins | 42 | Wife | — | Irish Free State |
| 37 | Harold Teb | 49 | Roomer | Janitor | England |
| 38 | Charles Auten | 48 | Roomer | Building Engineer | California |
| 39 | Thomas Gibbons | 70 | Head | — | California |
| 40 | Mary Gibbons | 70 | Wife | — | California |
Pedigree Summary
Robert + 3 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)