RZ
Robert Zimmerman — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this Robert Zimmerman across the 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 8-person household.
Age 14
b. ~1926
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Zimmerman |
| Given Name | Robert Glen |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Thurston |
| 1935 Residence (County) | Thurston |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Washington |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Los Angeles City |
| Est. Birth Year | ~1926 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Carl Zimmerman | Son | — | 13 | ~1927 |
| Katheryn Zimmerman | Daughter | — | 15 | ~1925 |
| Robert Zimmerman | Son | — | 14 | ~1926 |
| Velma Zimmerman | Spouse | — | 33 | ~1907 |
| Betty Zimmerman | Daughter | — | 11 | ~1929 |
| Gwen Zimmerman | Daughter | — | 3 | ~1937 |
| Glen Zimmerman | Head | — | 36 | ~1904 |
| Shirley Zimmerman | Daughter | — | 2 | ~1938 |
Census Appearances
1930
Los Angeles, …
Son, age 4
Los Angeles, California · implied b. ~1926 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Zimmerman |
| Given Name | Robert D. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Oregon |
| Occupation | none |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Los-Angeles-County, California
Son, age 14
Los-Angeles-County, California · implied b. ~1926 — 8 household members
| Surname | Zimmerman |
| Given Name | Robert Glen |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Thurston |
| 1935 Residence (County) | Thurston |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Washington |
| 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 Robert Zimmerman across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Zimmerman
Son · 1940 · age 14 · b. ~1926 · California
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Sibling
Gwen Zimmerman
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carl Zimmerman
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Zimmerman
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Shirley Zimmerman
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Katheryn Zimmerman
Sibling · 1940 · age 15
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 — Los-Angeles-County, California
Open full size
1940 US Federal Census — Los-Angeles-County, California
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-00377-00032)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | James O. Kittlejohn | 66 | Head | — | Alabama |
| 42 | Mabel S. Kittlejohn | 59 | Wife | — | Kentucky |
| 43 | Buster Kates | 34 | Head | Road Construction | Oklahoma |
| 44 | Elsie Kates | 30 | Wife | Sales Lady | Kansas |
| 45 | Pauline Kates | 12 | Daughter | — | Iowa |
| 46 | Mary Louise Kates | 10 | Daughter | — | California |
| 47 | Ray Kates | 8 | Son | — | New Mexico |
| 48 | John M. Boyd | 40 | Head | Assistant Manager | Illinois |
| 49 | Irene Boyd | 36 | Wife | — | Illinois |
| 51 | Edward F. Whiddon | 46 | Head | Contract Cabinet Work | California |
| 52 | Clare Whiddon | 40 | Wife | Dental Nurse | South Dakota |
| 54 | William Fenchel | 59 | Head | Street Maintenance | Ohio |
| 55 | Mary Fenchel | 41 | Wife | — | Illinois |
| 56 | Kathryn F. Albrecht | 46 | Head | — | Nebraska |
| 57 | Elsie Albrecht | 45 | Sister | — | Nebraska |
| 58 | Blanche M. Shaffer | 38 | Sister | Cook-Waitress | Washington |
| 59 | Paula Sue Shaffer | 4 | Niece | — | California |
| 60 | Kathryn Frances Shaffer | 3 | Niece | — | California |
| 61 | Joseph Daniel Shaffer | 1 | Nephew | — | California |
| 62 | Glen Zimmerman | 36 | Head | Plasterer | Iowa |
| 63 | Velma Zimmerman | 33 | Wife | — | Oregon |
| 64 | Katheryn M. Zimmerman | 15 | Daughter | — | California |
| 65 | Robert Glen Zimmerman THIS PERSON | 14 | Son | — | California |
| 66 | Carl Vern Zimmerman | 13 | Son | — | California |
| 67 | Betty Mae Zimmerman | 11 | Daughter | — | California |
| 68 | Gwen Ruth Zimmerman | 3 | Daughter | — | Washington |
| 69 | Shirley Louise Zimmerman | 2 | Daughter | — | Washington |
| 70 | Massena Bump | 30 | Head | Hauls Building Construction | Oklahoma |
| 71 | Irma Bump | 29 | Wife | — | Oklahoma |
| 72 | Cherilyn Bump | 3 | Daughter | — | California |
| 74 | Kenichi Koishi | 53 | Head | Vegetable Gardener | Japan |
| 75 | Asano Koishi | 50 | Wife | — | Japan |
| 76 | Masayo Koishi | 22 | Daughter | Assistant Gardener | California |
| 77 | Michiye Koishi | 20 | Daughter | Assistant Gardener | California |
| 78 | Henry Yoshinobu Koishi | 16 | Son | Assistant Gardener | California |
| 79 | Joseph Marsik | 64 | Head | Carpenter | Czechoslovakia |
| 80 | Joseph Marsik | 19 | Son | Hauler Of Fertilizer | Illinois |
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)