DC
Dorothy Cook — 1940 US Census Record
Model Tree available1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this Dorothy Cook across the 1910, 1920, 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed), with identified parents Harry & Harry — first a daughter (b.~1910), then head of a 4-person household.
Age 30
b. ~1910
Female
Daughter
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | Cook |
| Given Name | Dorothy |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco City |
| Additional Details | |
| Occupation | Secretary |
| Industry | Banking |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | No Hs 4 |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Secretary |
| Township / Ward | San Francisco City |
| Est. Birth Year | ~1910 |
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 Dorothy | Age | Birth yr |
|---|---|---|---|---|
| L Cook | Head | — | 60 | ~1880 |
| Dorothy Cook | Daughter | — | 30 | ~1910 |
| Marguerite Cook | Spouse | — | 60 | ~1880 |
| L Cook | Son | — | 28 | ~1912 |
Census Appearances
1910
San Francisco, …
Daughter, age 1
San Francisco, California · implied b. ~1909 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Dorothy R. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1920
San Francisco, …
Daughter, age 10
San Francisco, California · implied b. ~1910 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Dorothy |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| 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, …
Daughter, age 21
San Francisco, California · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Dorothy |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Occupation | Stenographer |
| Industry | Collection Agency |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Daughter, age 30
San-Francisco-County, California · implied b. ~1910 — 4 household members
| Surname | Cook |
| Given Name | Dorothy |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco City |
| Occupation | Secretary |
| Industry | Banking |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | No Hs 4 |
| 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 Dorothy Cook across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Harry Cook (~0.92 confidence) and father Harry Cook (~0.92 confidence) and father Harry Cook (~0.92 confidence) and father L Cook (~0.92 confidence) and mother Margaret Cook (~0.92 confidence) and mother Marguerite Cook (~0.92 confidence) and mother Marguerite Cook (~0.92 confidence). The pedigree spans 1 generation with 7 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Harry Cook
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Harry Cook
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Harry Cook
b. ~1878
Source father
● Household
· direct · ~0.92
Father
L Cook
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Margaret Cook
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Marguerite Cook
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Marguerite Cook
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Dorothy Cook
Daughter · 1940 · age 30 · b. ~1910 · California
★ You are viewing this record
Sibling
L Cook
Sibling · 1940 · age 28
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-t0627-00312-00775)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Emma Mayes | 65 | Head | State Relief | Germany |
| 2 | Herb Mayes | 63 | Husband | Inspector | England |
| 3 | C. Herb Mayes | 25 | Son | Biologist Surveyor | California |
| 4 | L. Arthur Johnson | 36 | Head | Longshoreman | North Dakota |
| 5 | J. Henrietta Johnson | 38 | Wife | — | Rhode Island |
| 6 | L. Arlee Johnson | 1 | Daughter | — | California |
| 7 | J. Michael Regan | 56 | Head | Contractor Painter | Ireland |
| 8 | Evelyn Regan | 53 | Wife | — | Washington |
| 9 | E. Madelin Regan | 25 | Daughter | — | California |
| 10 | Neil Mccallum | 58 | Head | Wireless Operator | Nova Scotia |
| 11 | John Smith | 45 | Head | Sales Manager Butter Eggs | California |
| 12 | Lenor Smith | 41 | Wife | — | California |
| 13 | Joan Smith | 21 | Daughter | School Teacher | California |
| 14 | John Smith | 17 | Son | — | California |
| 15 | — | None | — | — | — |
| 16 | Joseph Goldsmith | 48 | Head | Machinist | Pennsylvania |
| 17 | Rose Goldsmith | 48 | Wife | Forelady Clothing Alteration | New York |
| 18 | Mildred Goldsmith | 24 | Daughter | Saleslady Retail Clothing | Pennsylvania |
| 19 | Harold Goldsmith | 20 | Son | Shipping Clerk | Pennsylvania |
| 20 | Arthur Oberle | 56 | Head | Manager Liquor Store | Missouri |
| 21 | Olinda Oberle | 54 | Sister | — | Missouri |
| 22 | Thusnanela Oberle | 52 | Sister | — | Missouri |
| 23 | H. Phil Jensen | 46 | Head | Owner Florist Shop | Denmark |
| 24 | Effie Jensen | 46 | Wife | — | Utah |
| 25 | Eleanor Jensen | 18 | Daughter | — | California |
| 26 | Roy Jensen | 15 | Son | — | California |
| 27 | John Lincoln | 27 | Head | Owner Butcher Shop | California |
| 28 | Beryl Lincoln | 29 | Wife | — | Columbia |
| 29 | John Lincoln | 7 | Son | — | California |
| 30 | Diane Lincoln | 3 | Daughter | — | California |
| 31 | Frank Graham | 61 | Head | Marine Engineer | California |
| 32 | Susan Graham | 61 | Wife | — | California |
| 33 | Richard Graham | 28 | Son | Shipping Clerk | California |
| 34 | Cathrine Fourcade | 30 | Neice | — | California |
| 35 | L. Harry Cook | 60 | Head | Police Inspector | California |
| 36 | Marguerite Cook | 60 | Wife | — | California |
| 37 | L. Harry Cook | 28 | Son | Teamster | California |
| 38 | Dorothy Cook THIS PERSON | 30 | Daughter | Secretary | California |
| 39 | J. Lester Castilla | 50 | Head | Owner Butcher Shop | California |
| 40 | Marguerite Castilla | 47 | Wife | — | California |
Pedigree Summary
Dorothy + 1 sibling
Gen 1 · 7 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)