JB
James Bradley — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mendocino-County, California
Our Model Tree links this James Bradley across the 1920, 1930 and 1940 US Censuses in Mendocino-County, California (XGBoost, ~Confirmed), with identified parents Robert & Robert — first a son (b.~1914), then head of a 4-person household.
Age 26
b. ~1914
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mendocino-County, California |
| Surname | Bradley |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Ten Mile |
| 1935 Residence (County) | Mendocino |
| Additional Details | |
| Occupation | Woodcutter |
| Industry | Retail Wood |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 908 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Woodcutter |
| Township / Ward | Ten Mile |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Mary Bradley | Head | — | 64 | ~1876 |
| Samuel Bradley | Son | — | 41 | ~1899 |
| Henry Bradley | Son | — | 28 | ~1912 |
| James Bradley | Son | — | 26 | ~1914 |
Census Appearances
1920
Mendocino, California
Son, age 6
Mendocino, California · implied b. ~1914 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bradley |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Connecticut |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
Mendocino, California
Son, age 16
Mendocino, California · implied b. ~1914 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bradley |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Connecticut |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Mendocino-County, California
Son, age 26
Mendocino-County, California · implied b. ~1914 — 4 household members
| Surname | Bradley |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Ten Mile |
| 1935 Residence (County) | Mendocino |
| Occupation | Woodcutter |
| Industry | Retail Wood |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 908 |
| Highest Grade | No 8 |
| 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 James Bradley across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Robert Bradley (~0.92 confidence) and father Robert Bradley (~0.92 confidence) and mother Mary Bradley (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Bradley
b. ~1872
Source father
● Household
· direct · ~0.92
Father
Robert Bradley
b. ~1872
Source father
● Household
· direct · ~0.92
Mother
Mary Bradley
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Bradley
Son · 1940 · age 26 · b. ~1914 · California
★ You are viewing this record
Sibling
Samuel Bradley
Sibling · 1940 · age 41
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Henry Bradley
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 — Mendocino-County, California
Open full size
1940 US Federal Census — Mendocino-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00263-00485)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Harold A. Spencer | 41 | Head | Sea- Or Clerk | California |
| 42 | Elizabeth Spencer | 35 | Wife | — | West Virginia |
| 43 | Elizabeth L. Spencer | 11 | Daughter | — | California |
| 44 | Marlene Ann Spencer | 7 | Daughter | — | California |
| 45 | Wheeler S. Williard | 36 | Head | Body Repair | Michigan |
| 46 | Josephine Williard | 35 | Wife | — | Kansas |
| 47 | Lorena Ruth Williard | 13 | Daughter | — | California |
| 48 | James F. Williard | 10 | Son | — | California |
| 49 | Ardelle H. Williard | 3 | Daughter | — | California |
| 50 | Allen F. Whipple | 58 | Head | Farmer | California |
| 51 | Mabel D. Whipple | 50 | Wife | — | California |
| 52 | Mabel A. Whipple | 25 | Daughter | Private Sect. | California |
| 53 | Francis Johnson | 47 | Head | Piler | California |
| 54 | Theresa Johnson | 48 | Wife | Practical Nurse | California |
| 55 | Eugene H. Burr | 18 | Son-Step | Laborer | California |
| 56 | Samuel T. Ballmen | 44 | Head | Carpenter | Finland |
| 57 | Rose E. Ballmen | 46 | Wife | — | California |
| 58 | Theodore W. Ballmen | 27 | Son | Laborer | California |
| 59 | Alice M. Ballmen | 10 | Daughter | — | California |
| 60 | Clarence Mason | 50 | Head | Barber | Nebraska |
| 61 | Maybel Mason | 40 | Wife | — | Missouri |
| 62 | Lorna Mason | 17 | Daughter | — | Washington |
| 63 | Raymond Mason | 6 | Son | — | California |
| 64 | Rebecca M. Coppock | 67 | Head | — | Ohio |
| 65 | Malcolm Mcdonald | 74 | Head | Watchman | Canada-English |
| 66 | Katherine Mcdonald | 50 | Wife | — | Canada-English |
| 67 | Ross Mcdonald | 24 | Son | Resawyer | Canada-English |
| 68 | David R. Suerko | 23 | Head | Laborer | California |
| 69 | Marguerite Suerko | 22 | Wife | — | California |
| 70 | Einar R. Erickson | 29 | Head | Laborer | California |
| 71 | Lucille Erickson | 24 | Wife | — | California |
| 72 | Doreen Erickson | 4 | Daughter | — | California |
| 73 | Benjamin F. Gisber | 82 | Head | — | Tennessee |
| 74 | Charles Wright | 58 | Lodger | Laborer | Tennessee |
| 75 | Mae Wright | 54 | Lodgers Wife | — | California |
| 76 | Fred Rudolph | 76 | Head | — | Germany |
| 77 | Mary J. Bradley | 64 | Head | — | Connecticut |
| 78 | Samuel Bradley | 41 | Son | Laborer | Connecticut |
| 79 | Henry Bradley | 28 | Son | Laborer | California |
| 80 | James Bradley THIS PERSON | 26 | Son | Woodcutter | California |
Related Census Records
Pedigree Summary
James + 2 siblings
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)