AC
Arthur Campbell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mendocino-County, California
Our Model Tree links this Arthur Campbell across the 1930 and 1940 US Censuses in Mendocino-County, California (XGBoost, ~Confirmed) — first a son (b.~1930), then head of a 10-person household.
Age 10
b. ~1930
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mendocino-County, California |
| Surname | Campbell |
| Given Name | Arthur R |
| Relationship to Head | son |
| Sex | M |
| Color / Race | American Indian |
| Age | 10 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | ROUND VALLEY JUDICIAL |
| 1935 Residence (County) | MENDOCINO |
| Additional Details | |
| Highest Grade | S 3 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Round Valley Judicial |
| Est. Birth Year | ~1930 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Arthur | Age | Birth yr |
|---|---|---|---|---|
| Amy Campbell | Daughter | — | 31 | ~1909 |
| Cynthia Campbell | Daughter | — | 20 | ~1920 |
| Susie Campbell | Spouse | — | 55 | ~1885 |
| Arthur Campbell | Son | — | 10 | ~1930 |
| Daniel Campbell | Head | — | 61 | ~1879 |
| Gladys Campbell | Daughter | — | 18 | ~1922 |
| Elsie Cachora | Daughter | — | 10 | ~1930 |
| Margaret Cachora | Other | — | 6 | ~1934 |
| Violet Cachora | Daughter | — | 32 | ~1908 |
| Barbara Cachora | Daughter | — | 9 | ~1931 |
Census Appearances
1930
Mendocino, California
Other, age 1
Mendocino, California · implied b. ~1929 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Arthur Jr. |
| Relationship to Head | Grandson |
| Sex | M |
| Color / Race | American Indian |
| Age | 1 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Mixed Blood |
| Mother's Birthplace | Pomo |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Mendocino-County, California
Son, age 10
Mendocino-County, California · implied b. ~1930 — 10 household members
| Surname | Campbell |
| Given Name | Arthur R |
| Relationship to Head | son |
| Sex | M |
| Color / Race | American Indian |
| Age | 10 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | ROUND VALLEY JUDICIAL |
| 1935 Residence (County) | MENDOCINO |
| Highest Grade | S 3 |
| 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 Arthur Campbell across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Arthur Campbell
Son · 1940 · age 10 · b. ~1930 · California
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Sibling
Barbara Cachora
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Violet Cachora
Sibling · 1940 · age 32
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gladys Campbell
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cynthia Campbell
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Amy Campbell
Sibling · 1940 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elsie Cachora
Sibling · 1940 · age 10
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-t0627-00263-00293)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Vinton | 9 | daughter | — | California |
| 42 | Edward E Hanson | 62 | employee | Laborer | Maryland |
| 43 | Milton J. Robbins | 31 | Head | Laborer | California |
| 44 | Florenz L. Robbins | 38 | wife | — | Missouri |
| 45 | Frank C (Ab) Edwards | 51 | Head | Shipfitter | Montana |
| 46 | Lillian A Edwards | 51 | wife | Farmer | Canada |
| 47 | Helen O Carter | 30 | daughter | — | Canada |
| 48 | Barbara M. Carter | 11 | grand-daughter | — | California |
| 49 | Donald Carter | 6 | grand-son | — | California |
| 50 | Gwendolyn C Mcmahon | 28 | step-daughter | — | Canada |
| 51 | Irene L Mcmahon | 4 | step-grand-daughter | — | California |
| 52 | Glenn Felger | 37 | Head | Farmer | California |
| 53 | Ethel Mendenhal | 46 | Lodger | — | Kansas |
| 54 | Albert H Martindale | 52 | Head | Farmer | California |
| 55 | Verie J. Martindale | 57 | wife | — | California |
| 56 | Oscar Nelson | 54 | Head | Farmer | Sweden |
| 57 | Cora H Nelson | 43 | wife | — | California |
| 58 | Henry L. Courtney | 53 | Head | Farmer | Missouri |
| 59 | Mary Courtney | 53 | wife | — | Austria |
| 60 | Extra Line Courtney | None | — | — | California |
| 61 | William S Wilburn | 70 | Head | — | California |
| 62 | Georgia A Wilburn | 69 | wife | — | California |
| 63 | Daniel Campbell | 61 | Head | Laborer | California |
| 64 | Susie M Campbell | 55 | wife | — | California |
| 65 | Amy J. Campbell | 31 | daughter | — | California |
| 66 | Gladys G Campbell | 18 | daughter | — | California |
| 67 | Cynthia Campbell | 20 | daughter | House Keeper | California |
| 68 | Arthur R Campbell THIS PERSON | 10 | son | — | California |
| 69 | Violet C Cachora | 32 | daughter | Ward Attendant | California |
| 70 | Elsie M. Cachora | 10 | daughter | — | California |
| 71 | Barbara A Cachora | 9 | daughter | — | California |
| 72 | Margaret F Cachora | 6 | grand-daughter | — | California |
| 73 | Ollie Wilsey | 62 | Head | — | California |
| 74 | Bert C Leggett | 49 | Lodger | Laborer | California |
| 75 | William R Wagoner | 36 | Lodger | Laborer | California |
| 76 | Annie F Feliz | 71 | Head | — | California |
| 77 | Luby G Luke | 52 | daughter | — | California |
| 78 | Robert D. Whipple | 14 | grandson | — | California |
| 79 | Alvin C Potter | 14 | ward | New Worker | California |
| 80 | Dudley Dorman | 40 | Head | Farmer | California |
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)