MJ
Marion Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Alameda-County, California
Our Model Tree links this Marion Johnson across the 1930 and 1940 US Censuses in Alameda-County, California (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 9-person household.
Age 17
b. ~1923
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Alameda-County, California |
| Surname | Johnson |
| Given Name | Marion H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | City of Berkeley |
| 1935 Residence (County) | Alameda |
| Additional Details | |
| Occupation | Student |
| Hours Worked | 6 |
| Income (1939) | 0 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Student |
| Township / Ward | City Of Berkeley |
| Est. Birth Year | ~1923 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Marion | Age | Birth yr |
|---|---|---|---|---|
| Carolyn Johnson | Daughter | — | 12 | ~1928 |
| Yvonne Johnson | Daughter | — | 2 | ~1938 |
| Cheryl Johnson | Daughter | — | 4 | ~1936 |
| J Johnson | Head | — | 47 | ~1893 |
| Marion Johnson | Son | — | 17 | ~1923 |
| Robert Johnson | Son | — | 21 | ~1919 |
| Thomas Johnson | Son | — | 9 | ~1931 |
| Richard Johnson | Son | — | 1 | ~1939 |
| La Johnson | Spouse | — | 36 | ~1904 |
Census Appearances
1930
Alameda, California
Son, age 7
Alameda, California · implied b. ~1923 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Marion A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Utah |
| Mother's Birthplace | Utah |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Alameda-County, California
Son, age 17
Alameda-County, California · implied b. ~1923 — 9 household members
| Surname | Johnson |
| Given Name | Marion H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | City of Berkeley |
| 1935 Residence (County) | Alameda |
| Occupation | Student |
| Hours Worked | 6 |
| Income (1939) | 0 |
| Highest Grade | H 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 Marion Johnson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Marion Johnson
Son · 1940 · age 17 · b. ~1923 · California
★ You are viewing this record
Sibling
Richard Johnson
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carolyn Johnson
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cheryl Johnson
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Yvonne Johnson
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Johnson
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas 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
38 people indexed on this census page (nara:1940:m-t0627-00190-00203)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | J. Leonard Johnson | 47 | Head | Attorney | Utah |
| 2 | La Von E. Johnson | 36 | Wife | Housewife | Utah |
| 3 | Robert H. Johnson | 21 | Son | Student | California |
| 4 | Marion H. Johnson THIS PERSON | 17 | Son | Student | California |
| 5 | Carolyn H. Johnson | 12 | Daughter | — | California |
| 6 | Thomas H. Johnson | 9 | Son | — | California |
| 7 | Cheryl B. Johnson | 4 | Daughter | — | California |
| 8 | Yvonne B. Johnson | 2 | Daughter | — | California |
| 9 | Richard B. Johnson | 1 | Son | — | California |
| 10 | Harold C. Clausman | 59 | Head | Salesman | California |
| 11 | Elizabeth L. Clausman | 56 | Sister | School Teacher | California |
| 12 | Lloyd Tracy | 45 | Head | Electrical Eng. | California |
| 13 | Lucie L. Tracy | 45 | Wife | Housewife | California |
| 14 | Roderick Tracy | 9 | Son | — | California |
| 15 | Eric Ogden | 37 | Head | Professor - Medicine | England |
| 16 | Olga Ogden | 35 | Wife | Housewife | Russia |
| 17 | Richard Ogden | 9 | Son | — | California |
| 18 | Eleanor Ogden | 5 | Daughter | — | California |
| 19 | Kathryn Ogden | 3 | Daughter | — | California |
| 21 | John E. Jr. Bronson | 35 | Head | Appraiser | Kansas |
| 22 | Margaret H. Bronson | 31 | Wife | Housewife | Alabama |
| 23 | Julia A. Bronson | 2 | Daughter | — | California |
| 25 | Ross S. Draper | 77 | Head | Housewife | Wisconsin |
| 26 | Alice R. Draper | 51 | Daughter | Teacher | Iowa |
| 27 | Clarence J. Addicott | 57 | Head | Surveying | California |
| 28 | Rosina L. Addicott | 56 | Wife | Housewife | Germany |
| 29 | Harrison R. Martin | 52 | Head | Civil Engineer | Illinois |
| 30 | Katherine E. Martin | 52 | Wife | Housewife | California |
| 31 | Lodger Elizabeth R. | None | F | Board Of Education City Of Berkeley | — |
| 32 | Lodger Robert George | None | M | Insurance | — |
| 33 | John E. Sr. Bronson | 65 | Head | Land Appraiser | Kansas |
| 34 | Julia E. Bronson | 61 | Wife | Housewife | Missouri |
| 35 | Mary Wickbury | 67 | Nurse | Nurse | Texas |
| 36 | Charles W. Day | 63 | Head | Social Worker | California |
| 37 | Clara S. Day | 24 | Wife | Student | California |
| 38 | Payne D. Grigg | 47 | Head | Salesman | Missouri |
| 39 | Ruth A. Grigg | 51 | Wife | Housewife | California |
| 40 | E. J. Stinsdale | 20 | Step-son | Student | Missouri |
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)