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Joseph Roberts — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Alameda-County, California
Our Model Tree links this Joseph Roberts across the 1930 and 1940 US Censuses in Alameda-County, California (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 8-person household.
Age 12
b. ~1928
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Alameda-County, California |
| Surname | Roberts |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Leandro City |
| 1935 Residence (County) | Alameda |
| Additional Details | |
| Highest Grade | Gr 5 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | San Leandro City |
| Est. Birth Year | ~1928 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Joseph | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Roberts | Daughter | — | 10 | ~1930 |
| Bernice Roberts | Daughter | — | 16 | ~1924 |
| Joseph Roberts | Son | — | 12 | ~1928 |
| William Roberts | Son | — | 14 | ~1926 |
| Orban Roberts | Son | — | 17 | ~1923 |
| Manuel Roberts | Son | — | 21 | ~1919 |
| Lee Roberts | Son | — | 8 | ~1932 |
| Mary Roberts | Head | — | 45 | ~1895 |
Census Appearances
1930
Alameda, California
Son, age 2
Alameda, California · implied b. ~1928 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Roberts |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Azore Island |
| Mother's Birthplace | Azore Island |
| Occupation | none |
| Can Read/Write | No |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Alameda-County, California
Son, age 12
Alameda-County, California · implied b. ~1928 — 8 household members
| Surname | Roberts |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Leandro City |
| 1935 Residence (County) | Alameda |
| Highest Grade | Gr 5 |
| 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 Joseph Roberts across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Joseph Roberts
Son · 1940 · age 12 · b. ~1928 · California
★ You are viewing this record
Sibling
Lee Roberts
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernice Roberts
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Roberts
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Manuel Roberts
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Orban Roberts
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Roberts
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 — Alameda-County, California
Open full size
1940 US Federal Census — Alameda-County, California
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-00184-00523)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Rev. John J. Kelly | 34 | Assistant | Assistant Pastor | New York State |
| 2 | Emma Seeman | 62 | Housekeeper | Housekeeper | New Hampshire |
| 3 | Robert J. Mooney | 54 | Head | Gardner | Missouri |
| 5 | Leopoldo Bartolini | 51 | Head | Painter | Italy |
| 6 | Gelinda Bartolini | 53 | Wife | — | Italy |
| 7 | Remo Bartolini | 26 | Head | Salesman | Italy |
| 8 | Florence Bartolini | 27 | Wife | Clerk | Italy |
| 9 | Harold A. Nelson | 26 | Head | Clerk | Iowa |
| 10 | Billie Nelson | 21 | Wife | — | California |
| 11 | Larry Nelson | 2 | Son | — | California |
| 12 | Ernest J. Michieli | 29 | Head | Painter | California |
| 13 | Lena Michieli | 25 | Wife | — | California |
| 14 | Roy Michieli | 3 | Son | — | California |
| 15 | Tony Fialho | 42 | Head | Proprietor | California |
| 16 | Rose Fialho | 39 | Wife | — | California |
| 17 | Thelma Cardoza | 13 | Niece | — | California |
| 18 | Marie Duarte | 36 | Head | — | California |
| 19 | Walter Duarte | 19 | Son | Plumber | California |
| 20 | Irene Duarte | 16 | Daughter | — | California |
| 21 | Joseph Duarte | 11 | Son | — | California |
| 22 | John A. Silva | 62 | Head | Laborer | Portugal |
| 23 | Mattie L. Silva | 57 | Wife | — | Portugal |
| 24 | William Silva | 24 | Son | Farm Laborer | California |
| 25 | Mabel Silva | 16 | Daughter | — | California |
| 26 | Phyllis Powers | 47 | Head | Piano Accompanist | California |
| 28 | Mary Roberts | 45 | Head | — | Rhode Island |
| 29 | Manuel Roberts | 21 | Son | Laborer | Rhode Island |
| 30 | Orban Roberts | 17 | Son | — | California |
| 31 | Bernice Roberts | 16 | Daughter | — | California |
| 32 | William Roberts | 14 | Son | — | California |
| 33 | Joseph Roberts THIS PERSON | 12 | Son | — | California |
| 34 | Dorothy Roberts | 10 | Daughter | — | California |
| 35 | Lee Roberts | 8 | Son | — | California |
| 36 | Mary Dutra | 48 | Head | — | California |
| 37 | John Dutra | 20 | Son | Tree Faller | California |
| 38 | George Dutra | 15 | Son | — | California |
| 39 | Lucy Dutra | 12 | Daughter | — | California |
| 40 | William Agrella | 36 | Head | Proprietor | 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)