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Frank Cooper — 1940 US Census Record
Model Tree available1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this Frank Cooper across the 1920, 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed), with identified parents Martha & Archibald — first a head (b.~1912), then head of a 3-person household.
Age 28
b. ~1912
Male
Head
Born: California
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | Cooper |
| Given Name | Frank D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Additional Details | |
| Occupation | Asst to Chemist |
| Industry | Soap & Disinfectant Manufacture |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 141 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Asst To Chemist |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1912 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Frank | Age | Birth yr |
|---|---|---|---|---|
| Barbara Cooper | Spouse | — | 27 | ~1913 |
| Frank Cooper | Head | — | 28 | ~1912 |
| Robert Cooper | Son | — | 6 | ~1934 |
Census Appearances
1920
San Francisco, …
Son, age 6
San Francisco, California · implied b. ~1914 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Frank |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
San Francisco, …
Son, age 16
San Francisco, California · implied b. ~1914 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Frank |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Head, age 28
San-Francisco-County, California · implied b. ~1912 — 3 household members
| Surname | Cooper |
| Given Name | Frank D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Occupation | Asst to Chemist |
| Industry | Soap & Disinfectant Manufacture |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 141 |
| 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 Frank Cooper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Martha Cooper (~0.92 confidence) and father Archibald Cooper (~0.92 confidence) and mother Martha Cooper (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Martha Cooper
b. ~1876
Source mother
● Household
· direct · ~0.92
Father
Archibald Cooper
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Martha Cooper
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Frank Cooper
Head · 1940 · age 28 · b. ~1912 · California
★ You are viewing this record
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-t0627-00315-00598)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles E. Moriarty | 63 | Head | Janitor | Massachusetts |
| 2 | Isabelle Moriarty | 64 | Wife | — | Canada |
| 3 | Joseph O'Neill | 44 | Head | Broker | California |
| 4 | Rita O'Neill | 42 | Wife | — | California |
| 5 | Nell Sheridan | 61 | Aunt | — | California |
| 6 | Joseph O'Neill | 13 | Son | — | California |
| 7 | Mary Jean O'Neill | 11 | Daughter | — | California |
| 8 | Margaret O'Neill | 9 | Daughter | — | California |
| 9 | Axel P. K. Andre | 60 | Head | Salesman | Norway |
| 10 | Astrid M. Andre | 51 | Wife | — | Norway |
| 11 | Arthur S. Andre | 24 | Son | — | California |
| 12 | Leif J. Andre | 23 | Son | Building Contractor | California |
| 13 | Norman A. Andre | 16 | Son | — | California |
| 14 | Joseph Marconi | 48 | Head | Assistant Chocolate Maker | Italy |
| 15 | Mary Marconi | 44 | Wife | Fancy Presser | Italy |
| 16 | Irene Marconi | 14 | Daughter | — | California |
| 17 | Steve M. Gritesh | 38 | Head | Truck Dispatcher | Washington |
| 18 | Esther Lee Gritesh | 36 | Wife | — | Texas |
| 19 | Steve K. Gritesh | 16 | Son | — | Washington |
| 20 | Frank D. Cooper THIS PERSON | 28 | Head | Asst To Chemist | California |
| 21 | Barbara Jane Cooper | 27 | Wife | Saleslady | California |
| 22 | Robert Frank Cooper | 6 | Son | — | California |
| 23 | Elizabeth Conway | 64 | Head | — | N. Ireland |
| 24 | Elizabeth Conway | 31 | Daughter | Telephone Appar. | California |
| 25 | Veronica D. Conway | 26 | Daughter | Nurse (Rn) | California |
| 26 | Agnes Conway | 24 | Daughter | Saleslady | California |
| 27 | Richard Appel | 28 | Head | Interior Decorator | Germany |
| 28 | Berta Appel | 28 | Wife | Typist | California |
| 29 | Ilian Appel | 4 | Daughter | — | California |
| 30 | Otto Hoch Yalen | 32 | Head | Salesman | Pennsylvania |
| 31 | Janet Harvie Yalen | 31 | Wife | Nurse Rn | Illinois |
| 32 | Michael Joseph Yalen | 6 | Son | — | Wisconsin |
| 33 | David Milton Yalen | 4 | Son | — | Wisconsin |
| 34 | Mamie Clark | 64 | Housekeeper | Housekeeper | Illinois |
| 35 | Olaf A. Andrew | 45 | Head | Fireman | Norway |
| 36 | Amy E. Andrew | 41 | Wife | — | Finland |
| 37 | Fortune R. Barrows | 46 | Head | Lineman | Canada French |
| 38 | Grace S. Barrows | 55 | Wife | Order Clerk | California |
| 39 | Sinclair Banks | 54 | Head | Clerk | Scotland |
| 40 | Ellen Jane Banks | 55 | Wife | — | Scotland |
Related Census Records
Pedigree Summary
Frank
Gen 1 · 3 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)