RJ
Ruth Johnston — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this Ruth Johnston across the 1920, 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed) — first a spouse (b.~1897), then head of a 3-person household.
Age 43
b. ~1897
Female
Spouse
Born: California
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Johnston |
| Given Name | Ruth M. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | Oakland |
| 1935 Residence (County) | Alameda |
| Additional Details | |
| Highest Grade | H 1 |
| 1935 Residence | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | South Pasadena City |
| Est. Birth Year | ~1897 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ruth | Age | Birth yr |
|---|---|---|---|---|
| Ruth Johnston | Spouse | — | 43 | ~1897 |
| Barbara Johnston | Daughter | — | 14 | ~1926 |
| Carlton Johnston | Head | — | 41 | ~1899 |
Census Appearances
1920
Los Angeles, …
Spouse, age 23
Los Angeles, California · implied b. ~1897 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Ruth M |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | California |
| Father's Birthplace | Illinois |
| Mother's Birthplace | New Jersey |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
Los Angeles, …
Spouse, age 32
Los Angeles, California · implied b. ~1898 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Ruth M. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | California |
| Age at First Marriage | 22 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | California |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Los-Angeles-County, California
Spouse, age 43
Los-Angeles-County, California · implied b. ~1897 — 3 household members
| Surname | Johnston |
| Given Name | Ruth M. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | Oakland |
| 1935 Residence (County) | Alameda |
| Highest Grade | H 1 |
| 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 Ruth Johnston across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Ruth Johnston
Spouse · 1940 · age 43 · b. ~1897 · California
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Los-Angeles-County, California
Open full size
1940 US Federal Census — Los-Angeles-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00243-00187)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | James W. Webster | 88 | Head | — | Illinois |
| 42 | Ruth C. Hillerby | 42 | Head | Teacher | California |
| 43 | Ray R. Crozier | 51 | Head | Letter Carrier | Arkansas |
| 44 | Mary G. Crozier | 52 | Wife | — | Arkansas |
| 45 | C. Russell Crozier | 18 | Son | — | Arkansas |
| 46 | George F. Love | 36 | Head | Accountant | Illinois |
| 47 | Florence M. Love | 32 | Wife | — | Nebraska |
| 48 | Helen Love | 13 | Daughter | — | California |
| 49 | George Love | 8 | Son | — | California |
| 50 | Evelyn Camman | 19 | Niece | Stenographer | California |
| 51 | George Strehlow | 42 | Head | Traffic Agent | California |
| 52 | Gwen Strehlow | 38 | Wife | — | Michigan |
| 53 | Louis Strehlow | 10 | Son | — | Washington |
| 54 | Sally Strehlow | 3 | Daughter | — | California |
| 55 | Carlton Johnston | 41 | Head | Salesman | California |
| 56 | Ruth M. Johnston THIS PERSON | 43 | Wife | — | California |
| 57 | Barbara Johnston | 14 | Daughter | — | California |
| 58 | John J. Mcgrath | 49 | Head | Mfg. + Salesman | Illinois |
| 59 | Alta R. Mcgrath | 47 | Wife | — | Illinois |
| 60 | John J. Jr. Mcgrath | 20 | Son | — | California |
| 61 | Betty Rene Mcgrath | 18 | Daughter | — | California |
| 62 | Clifford Smith Green | 42 | Head | Teacher Physical Education | Iowa |
| 63 | Marguerite E. Green | 39 | Wife | Demonstrator | Iowa |
| 64 | Patricia R. Green | 7 | Daughter | — | California |
| 65 | Gertrude I. Grether | 28 | Sister-in-law | — | Iowa |
| 66 | Joseph F. Wilson | 62 | Head | Salesman | Iowa |
| 67 | Frances Wilson | 56 | Wife | — | South Dakota |
| 68 | Edward Brett | 37 | Head | Architect | California |
| 69 | Florence Brett | 37 | Wife | — | Minnesota |
| 70 | Ethelyn Webb | 68 | Mother-in-law | — | Minnesota |
| 71 | Richard S. Franz | 48 | Head | Electrical Contractor | California |
| 72 | Katherine Franz | 48 | Wife | — | Michigan |
| 73 | John H. Muchmore | 29 | Head | Credit Mgr. | California |
| 74 | Mary Caroline Muchmore | 30 | Wife | Host Cashier | Washington |
| 75 | Walter F. Schatzmayer | 61 | Head | Watch Maker | Italy |
| 76 | Reba D. Schatzmayer | 45 | Wife | Library | Illinois |
| 77 | Charles F. Payne | 45 | Head | Insurance Man | Illinois |
| 78 | Helen G. Payne | 38 | Wife | — | Canada-Eng |
| 79 | Claude D. Seaman | 60 | Head | Salesman | Ohio |
| 80 | Maude F. Seaman | 59 | Wife | — | Indiana |
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)