RS
Robert Simpson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this Robert Simpson across the 1920, 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed), with identified parents Edward & Frances — first a son (b.~1914), then head of a 6-person household.
Age 26
b. ~1914
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Simpson |
| Given Name | Robert J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | South Pasadena City |
| 1935 Residence (County) | Los Angeles |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | C-3 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | South Pasadena City |
| Est. Birth Year | ~1914 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Frances Simpson | Daughter | — | 19 | ~1921 |
| J Simpson | Head | — | 45 | ~1895 |
| B Haman | Other | — | 74 | ~1866 |
| Henry Simpson | Son | — | 28 | ~1912 |
| Robert Simpson | Son | — | 26 | ~1914 |
| Frances Simpson | Spouse | — | 45 | ~1895 |
Census Appearances
1920
Los Angeles, …
Son, age 5
Los Angeles, California · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simpson |
| Given Name | Robert |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Occupation | none |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
Los Angeles, …
Son, age 16
Los Angeles, California · implied b. ~1914 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simpson |
| Given Name | Robert J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Los-Angeles-County, California
Son, age 26
Los-Angeles-County, California · implied b. ~1914 — 6 household members
| Surname | Simpson |
| Given Name | Robert J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | South Pasadena City |
| 1935 Residence (County) | Los Angeles |
| Income (1939) | 0 |
| Highest Grade | C-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 Robert Simpson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Edward Simpson (~0.92 confidence) and mother Frances Simpson (~0.92 confidence) and mother Frances Simpson (~0.92 confidence) and father J Simpson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Edward Simpson
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Frances Simpson
b. ~1889
Source mother
● Household
· direct · ~0.92
Mother
Frances Simpson
b. ~1895
Source mother
● Household
· direct · ~0.92
Father
J Simpson
b. ~1895
Source father
● Household
· direct · ~0.92
This person
Anchor record
Robert Simpson
Son · 1940 · age 26 · b. ~1914 · California
★ You are viewing this record
Sibling
Frances Simpson
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Henry Simpson
Sibling · 1940 · age 28
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
38 people indexed on this census page (nara:1940:m-t0627-00243-00345)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Matilda Tee | 78 | Head | — | Illinois |
| 42 | Meta Rodbury|Rodberry | 70 | Sister | — | Illinois |
| 43 | Bertha Rodbury|Rodberry | 69 | Sister | — | Illinois |
| 44 | Hellen B. Neil | 43 | Servant | Housekeeper | Illinois |
| 45 | Erasmus D. Merritt | 52 | Head | Insurance Agent | Massachusetts |
| 46 | Annie S. Merritt | 49 | Wife | — | California |
| 47 | Catherine Merritt | 22 | Daughter | — | California |
| 48 | Anne Louise Merritt | 20 | Daughter | — | California |
| 49 | Lila Baird | 65 | Head | — | Missouri |
| 50 | Ida L. Miller | 61 | Partner | — | Wisconsin |
| 51 | Samuel W. Wheeler | 59 | Head | Industrial Engineer | Pennsylvania |
| 52 | Catherine Wheeler | 39 | Wife | — | Wisconsin |
| 53 | Catherine Wheeler | 9 | Daughter | — | California |
| 54 | Marie Branco | 30 | Servant | House Maid | Oklahoma |
| 55 | Entered On Out Of Order Sheet | None | — | — | — |
| 58 | Henry W. Wright | 72 | Head | Real Estate Broker | Iowa |
| 59 | Blanche R. Wright | 67 | Wife | — | Iowa |
| 60 | Ralph B. Wright | 35 | Son | Deputy Sheriff | Minnesota |
| 61 | Lucille Wright | 35 | Daughter-in-law | Teacher | California |
| 62 | William E. Wright | 43 | Son | Architect | Iowa |
| 63 | Margaret L. Thomas | 43 | Head | Music Teacher | Nebraska |
| 64 | J. H. Simpson | 45 | Head | Broker | Missouri |
| 65 | Frances I. Simpson | 45 | Wife | — | Missouri |
| 66 | Henry R. Simpson | 28 | Son | New Worker | California |
| 67 | Robert J. Simpson THIS PERSON | 26 | Son | — | California |
| 68 | Frances M. Simpson | 19 | Daughter | — | California |
| 69 | B. Haman | 74 | Father | Broker | Kansas |
| 70 | Herman Entenberry | 51 | Head | Deputy District Attorney | Kentucky |
| 71 | Imogene Entenberry | 43 | Wife | — | Texas |
| 72 | Douglas Entenberry | 11 | Son | — | California |
| 73 | William Entenberry | 9 | Son | — | California |
| 74 | Roland J. Myers | 48 | Head | Negotiator | Nebraska |
| 75 | Elda A. Myers | 50 | Wife | — | Nebraska |
| 76 | Eleanor Myers | 20 | Daughter | — | Nebraska |
| 77 | Robert J. Myers | 15 | Son | — | Nebraska |
| 78 | Robert D. Russell | 39 | Head | Insurance Broker | Missouri |
| 79 | Ida E. Russell | 38 | Wife | — | New York |
| 80 | James Russell | 13 | Son | — | California |
Pedigree Summary
Robert + 2 siblings
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)