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James Bradley — 1940 US Census Record
Model Tree available1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this James Bradley across the 1920, 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed), with identified parents Frederick & Mary — first a head (b.~1907), then head of a 5-person household.
Age 33
b. ~1907
Male
Head
Born: California
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | Bradley |
| Given Name | James P. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | New York |
| 1935 Residence (County) | New York |
| Additional Details | |
| Occupation | Mining Engineer |
| Industry | Mining |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 5200 |
| Highest Grade | C 4 |
| 1935 Residence | New York |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Mining Engineer |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1907 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Mary Bradley | Daughter | — | 2 | ~1938 |
| James Bradley | Head | — | 33 | ~1907 |
| Frederica Kane | Other | — | 27 | ~1913 |
| Chong Low | Other | — | 32 | ~1908 |
| Frances Bradley | Spouse | — | 28 | ~1912 |
Census Appearances
1920
San Francisco, …
Son, age 11
San Francisco, California · implied b. ~1909 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bradley |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
San Francisco, …
Son, age 22
San Francisco, California · implied b. ~1908 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bradley |
| Given Name | James P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Occupation | Supt. |
| Industry | Mine |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Head, age 33
San-Francisco-County, California · implied b. ~1907 — 5 household members
| Surname | Bradley |
| Given Name | James P. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | New York |
| 1935 Residence (County) | New York |
| Occupation | Mining Engineer |
| Industry | Mining |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 5200 |
| Highest Grade | C 4 |
| 1935 Residence | New York |
| 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 James Bradley across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Frederick Bradley (~0.92 confidence) and mother Mary Bradley (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frederick Bradley
b. ~1864
Source father
● Household
· direct · ~0.92
Mother
Mary Bradley
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Bradley
Head · 1940 · age 33 · b. ~1907 · 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
38 people indexed on this census page (nara:1940:m-t0627-00318-00319)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Florence Sherman | 49 | Wife | — | California |
| 42 | Robert Sherman | 22 | Son | — | California |
| 43 | Edward Sherman | 16 | Son | — | California |
| 44 | Helene Eisner | 42 | Head | — | New Jersey |
| 45 | Sigmund Eisner | 19 | Son | — | New Jersey |
| 46 | Victor Eisner | 18 | Son | — | New Jersey |
| 47 | Harold L. A. Monsey | 33 | Brother | Dentist | New Jersey |
| 48 | Odani Watsuko | 25 | Maid | Maid | Hawaii, T.H. |
| 49 | Ishide Sunayo | 55 | Maid's Mother | — | Hawaii, T.H. |
| 50 | Edward Cassidy | 51 | Head | Printer | California |
| 51 | Mildred Cassidy | 44 | Wife | — | California |
| 52 | Evelyn Cassidy | 19 | Daughter | — | California |
| 53 | Elaine Cassidy | 17 | Daughter | — | California |
| 54 | Kathryn Cassidy | 15 | Daughter | — | California |
| 55 | Frank Cassidy | 12 | Daughter | — | California |
| 56 | Keno | 45 | Servant | Servant | Japan |
| 58 | George Hudson | 62 | Head | Contractor | England |
| 59 | Alice Hudson | 56 | Wife | — | Texas |
| 60 | Elsie Fleishman | 61 | Head | — | New Jersey |
| 61 | Wilmin Wolf | 75 | Brother | — | California |
| 62 | Emma Dittle | 34 | Maid | Maid | Argentine |
| 63 | Loy Lansburgh | 60 | Lodger | Lawyer | Panama Canal |
| 64 | Ethel Lansburgh | 54 | Lodger | — | California |
| 65 | Hamilton Murray | 51 | Head | — | California |
| 66 | Ila Murray | 49 | Wife | — | California |
| 67 | Frederick Murray | 14 | Son | — | California |
| 68 | Woo Wing | 45 | Cook | Cook | China |
| 69 | Lucille Preston | 65 | Maid | Maid | Texas |
| 70 | James P. Bradley THIS PERSON | 33 | Head | Mining Engineer | California |
| 71 | Frances Bradley | 28 | Wife | — | California |
| 72 | Mary Louise Bradley | 2 | Daughter | — | California |
| 73 | Frederica Kane | 27 | Nurse | Maid | Germany |
| 74 | Chong Low | 32 | Cook | Cook | California |
| 76 | Virginia Stow | 40 | Head | — | Hungary |
| 77 | Alginnon Crofton | 63 | Head | — | New York |
| 78 | Edith Crofton | 70 | Wife | — | Canada English |
| 79 | John Cebian | 17 | Grandson | — | California |
| 80 | Vincent Sallores | 36 | Chauffeur | Chauffeur | Philippine Is. |
Pedigree Summary
James
Gen 1 · 2 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)