BJ
Barbara Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Alameda-County, California
Our Model Tree links this Barbara Johnson across the 1930 and 1940 US Censuses in Alameda-County, California (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 6-person household.
Age 13
b. ~1927
Female
Daughter
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Alameda-County, California |
| Surname | Johnson |
| Given Name | Barbara A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Piedmont |
| 1935 Residence (County) | Alameda |
| Additional Details | |
| Industry | 0 |
| Highest Grade | No 8 |
| 1935 Residence | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Oakland City |
| Est. Birth Year | ~1927 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Barbara | Age | Birth yr |
|---|---|---|---|---|
| Beverly Johnson | Daughter | — | 6 | ~1934 |
| Karen Johnson | Daughter | — | 4 | ~1936 |
| Barbara Johnson | Daughter | — | 13 | ~1927 |
| William Johnson | Head | — | 40 | ~1900 |
| William Johnson | Son | — | 9 | ~1931 |
| Ruby Johnson | Spouse | — | 34 | ~1906 |
Census Appearances
1930
Alameda, California
Daughter, age 3
Alameda, California · implied b. ~1927 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Barbara |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Alameda-County, California
Daughter, age 13
Alameda-County, California · implied b. ~1927 — 6 household members
| Surname | Johnson |
| Given Name | Barbara A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Piedmont |
| 1935 Residence (County) | Alameda |
| Industry | 0 |
| Highest Grade | No 8 |
| 1935 Residence | California |
| 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 Barbara Johnson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Barbara Johnson
Daughter · 1940 · age 13 · b. ~1927 · California
★ You are viewing this record
Sibling
Karen Johnson
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Beverly Johnson
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Johnson
Sibling · 1940 · age 9
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
40 people indexed on this census page (nara:1940:m-t0627-00437-00376)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Richardson J Ott | 44 | Head | Grocer | Ohio |
| 2 | Ruth M Ott | 26 | Wife | — | California |
| 3 | Marlene Ray Ott | 0 | Daughter | — | California |
| 4 | William D Johnson | 40 | Head | Manager | Wisconsin |
| 5 | Ruby L Johnson | 34 | Wife | — | California |
| 6 | Barbara A Johnson THIS PERSON | 13 | Daughter | — | California |
| 7 | William C Johnson | 9 | Son | — | California |
| 8 | Beverly J Johnson | 6 | Daughter | — | California |
| 9 | Karen L Johnson | 4 | Daughter | — | California |
| 10 | Carlos Taylor | 39 | Head | Painter | Missouri |
| 11 | Lillie Taylor | 46 | Cousin | Coach Cleaner | Utah |
| 12 | James Daniel Murphy | 35 | Head | Salesman | Washington |
| 13 | Violet Murphy | 30 | Wife | — | California |
| 14 | Daniel J Murphy | 10 | Son | — | California |
| 15 | William F Murphy | 7 | Son | — | California |
| 16 | Marilyn M Murphy | 5 | Daughter | — | California |
| 17 | Margaret M Murphy | 58 | Grandmother | — | Massachusetts |
| 18 | Arthur Stagnaro | 43 | Head | Plater | California |
| 19 | Winifred Stagnaro | 41 | Wife | — | California |
| 20 | Gertrude Jean Stagnaro | 10 | Daughter | — | California |
| 21 | Raymond A Rasmussen | 20 | Stepson | Helper | California |
| 22 | George Hukkanen | 41 | Head | Machinist | Finland |
| 23 | Winifred Hukkanen | 41 | Wife | — | California |
| 24 | Barbara Jean Pagel | 9 | Step daughter | — | California |
| 25 | Charles E Camper | 41 | Head | Salesman | California |
| 26 | Mary E Camper | 41 | Wife | — | California |
| 27 | Charles E Camper | 20 | Son | — | California |
| 28 | Robert W Haynes | 45 | Head | Government | California |
| 29 | Edna V Haynes | 45 | Wife | — | Wisconsin |
| 30 | Robert Irving Haynes | 8 | Son | — | California |
| 31 | Raymond Mullen | 30 | Head | Accountant | California |
| 32 | Margaret Mullen | 30 | Wife | — | California |
| 33 | James Robert Mullen | 2 | Son | — | California |
| 34 | Joan Marie Mullen | 0 | Daughter | — | California |
| 35 | Arthur H Triggs | 33 | Head | Painter | Nebraska |
| 36 | Emily M Triggs | 30 | Wife | — | California |
| 37 | Edward Triggs | 9 | Son | — | California |
| 38 | Donnie Lee Triggs | 4 | Daughter | — | California |
| 39 | Herbert J Miltz | 49 | Head | Machinist | Ohio |
| 40 | Eunice Adele Miltz | 47 | Wife | — | Washington |
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)