JT
James Thompson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this James Thompson across the 1920, 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed), with identified parents Fred & Fred — first a son (b.~1919), then head of a 5-person household.
Age 21
b. ~1919
Male
Son
Born: Washington
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Thompson |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | Los Angeles |
| Additional Details | |
| Occupation | Clerk |
| Industry | Retail Grocery |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 280 |
| Highest Grade | S-2 |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| Occupation | Clerk |
| Township / Ward | Los Angeles |
| Est. Birth Year | ~1919 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Rosemary Thompson | Daughter | — | 12 | ~1928 |
| Virginia Thompson | Daughter | — | 19 | ~1921 |
| Fred Thompson | Head | — | 49 | ~1891 |
| James Thompson | Son | — | 21 | ~1919 |
| Gladys Thompson | Spouse | — | 44 | ~1896 |
Census Appearances
1920
Los Angeles, …
Son, age 1
Los Angeles, California · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | James F |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Kansas |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1930
Los Angeles, …
Son, age 11
Los Angeles, California · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | James F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Kansas |
| Can Read/Write | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1940
Los-Angeles-County, California
Son, age 21
Los-Angeles-County, California · implied b. ~1919 — 5 household members
| Surname | Thompson |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | Los Angeles |
| Occupation | Clerk |
| Industry | Retail Grocery |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 280 |
| Highest Grade | S-2 |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
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 James Thompson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Fred Thompson (~0.92 confidence) and father Fred Thompson (~0.92 confidence) and father Frederick Thompson (~0.92 confidence) and mother Gladys Thompson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Fred Thompson
b. ~1891
Source father
● Household
· direct · ~0.92
Father
Fred Thompson
b. ~1891
Source father
● Household
· direct · ~0.92
Father
Frederick Thompson
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
Gladys Thompson
b. ~1896
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Thompson
Son · 1940 · age 21 · b. ~1919 · California
★ You are viewing this record
Sibling
Virginia Thompson
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rosemary Thompson
Sibling · 1940 · age 12
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
40 people indexed on this census page (nara:1940:m-t0627-00432-00604)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Patsy Tacos | 5 | Daughter | — | California |
| 2 | Fred W. Thompson | 49 | Head | Maintainer | Illinois |
| 3 | Gladys H. Thompson | 44 | Wife | — | Kansas |
| 4 | James Thompson THIS PERSON | 21 | Son | Clerk | Washington |
| 5 | Virginia Thompson | 19 | Daughter | Model | California |
| 6 | Rosemary Thompson | 12 | Daughter | — | California |
| 7 | Rollin R. O'Dell | 27 | Head | Yeoman | No. Carolina |
| 8 | Leila O'Dell | 26 | Wife | — | Finland |
| 9 | Rollin R. Jr. O'Dell | 4 | Son | — | No. Carolina |
| 10 | David A. Wright | 36 | Head | Salesman | Arkansas |
| 11 | Bessie Wright | 35 | Wife | — | Arkansas |
| 12 | Rudolph Wright | 14 | Son | — | Arkansas |
| 13 | Barbara Wright | 5 | Daughter | — | Arkansas |
| 14 | Thomas S. Murdock | 30 | Head | Representative | Massachusetts |
| 15 | Helma Murdock | 30 | Wife | — | Indiana |
| 16 | Thomas Jr. Murdock | 8 | Son | — | California |
| 17 | Jerome La Vasseur | 25 | Head | Stevedore | Michigan |
| 18 | Helen La Vasseur | 21 | Wife | — | New Jersey |
| 19 | Jess G. Grindell | 52 | Head | Warehouseman | Minnesota |
| 20 | Otto R. Mckinley | 42 | Head | Freight Solicitor | Oregon |
| 21 | Ada E. Mckinley | 36 | Wife | — | Illinois |
| 22 | April Mckinley | 4 | Daughter | — | California |
| 23 | Laura Larson | 55 | Head | — | Wisconsin |
| 24 | Marita Larson | 17 | Daughter | — | Wisconsin |
| 25 | Roberta Larson | 12 | Daughter | — | California |
| 26 | Harold Larson | 19 | Son | Saw Man | Wisconsin |
| 27 | Louise Larson | 20 | Daughter in Law | — | Oklahoma |
| 28 | Johannes Hildhain | 36 | Head | Steward | Germany |
| 29 | Erika Hildhain | 31 | Wife | — | Germany |
| 30 | Margaret Hildhain | 2 | Daughter | — | California |
| 31 | Elizabeth Hildhain | 4 | Daughter | — | California |
| 32 | Edward Mclay | 52 | Head | Stevedore | Utah |
| 33 | Nellie Mclay | 48 | Wife | Housework | Wisconsin |
| 34 | Elise Mclay | 17 | Daughter | — | Washington |
| 35 | Edgar Mclay | 11 | Son | — | Washington |
| 36 | Lucille Marks | 20 | Daughter | — | Washington |
| 37 | Sharon Lee Marks | 0 | Granddaughter | — | California |
| 38 | Byron G. Pince | 44 | Head | Electrician | Colorado |
| 39 | Grace Pince | 40 | Wife | — | Kansas |
| 40 | Roy E. Newcombie | 56 | Head | Machinist | Iowa |
Related Census Records
Pedigree Summary
James + 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)