JC
James Cox — 1940 US Census Record
Model Tree available1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this James Cox across the 1920, 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1917), then head of a 4-person household.
Age 23
b. ~1917
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Cox |
| Given Name | James W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Pomona city |
| 1935 Residence (County) | Los Angeles |
| Additional Details | |
| Occupation | Computer cashier |
| Industry | Electric utility company |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1374 |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Computer Cashier |
| Township / Ward | Pomona City |
| Est. Birth Year | ~1917 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| William Cox | Head | — | 54 | ~1886 |
| Betty Cox | Other | — | 23 | ~1917 |
| James Cox | Son | — | 23 | ~1917 |
| Ina Cox | Spouse | — | 51 | ~1889 |
Census Appearances
1920
Los Angeles, …
Son, age 3
Los Angeles, California · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | James W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
Los Angeles, …
Son, age 13
Los Angeles, California · implied b. ~1917 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | James W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | California |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Los-Angeles-County, California
Son, age 23
Los-Angeles-County, California · implied b. ~1917 — 4 household members
| Surname | Cox |
| Given Name | James W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Pomona city |
| 1935 Residence (County) | Los Angeles |
| Occupation | Computer cashier |
| Industry | Electric utility company |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1374 |
| Highest Grade | H-2 |
| 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 James Cox across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Cox (~0.92 confidence) and father William Cox (~0.92 confidence) and father William Cox (~0.92 confidence) and mother Ina Cox (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Cox
b. ~1880
Source father
● Household
· direct · ~0.92
Father
William Cox
b. ~1886
Source father
● Household
· direct · ~0.92
Father
William Cox
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Ina Cox
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Cox
Son · 1940 · age 23 · b. ~1917 · California
★ You are viewing this record
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-t0627-00255-00294)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Eva M. Cope | 55 | Wife | — | Iowa |
| 2 | Marilyn E. Cope | 16 | Daughter | — | California |
| 3 | Parker H. Butler | 74 | Father-in-law | — | Illinois |
| 4 | William C. Cox | 54 | Head | Truck Foreman | Pennsylvania |
| 5 | Ina E. Cox | 51 | Wife | — | California |
| 6 | James W. Cox THIS PERSON | 23 | Son | Computer Cashier | California |
| 7 | Betty L. Cox | 23 | Daughter-in-law | Stenographer | California |
| 8 | Paul E. Dornbach | 45 | Head | Electrician | Illinois |
| 9 | Ethyl M. Dornbach | 40 | Wife | — | Louisiana |
| 10 | Maurice A. Carter | 58 | Head | Machinist | Iowa |
| 11 | Maude I. Carter | 54 | Wife | — | West Virginia |
| 12 | Eugene La Chut | 13 | Nephew | — | Ohio |
| 13 | Mary Battrell | 77 | Head | — | Illinois |
| 14 | Lucille Gjerde | 42 | Head | — | Washington D.C. |
| 15 | Miriam Gjerde | 11 | Daughter | — | California |
| 16 | Edward F. Struve | 62 | Head | Manager & Secretary | Ohio |
| 17 | Lillian W. Struve | 65 | Wife | — | Ohio |
| 18 | Noble Green | 34 | Head | Sheet Metal Worker | Texas |
| 19 | Azalene Green | 35 | Wife | — | Texas |
| 20 | Annette Green | 15 | Daughter | — | Texas |
| 21 | William H. James | 60 | Head | Manager | Wisconsin |
| 22 | Ellen B. James | 63 | Wife | — | Iowa |
| 23 | Roy C. Savage | 45 | Head | Bookkeeping | Utah |
| 24 | Anna F. Savage | 45 | Wife | — | Minnesota |
| 25 | Joseph A. Rossmiller | 46 | Head | Chauffeur & Gardener | Illinois |
| 26 | Ellen H. Rossmiller | 38 | Wife | — | Illinois |
| 27 | Barbara A. Rossmiller | 16 | Daughter | — | California |
| 28 | Robert J. Rossmiller | 15 | Son | — | California |
| 29 | Mary L. Rossmiller | 10 | Daughter | — | California |
| 30 | Janet L. Rossmiller | 5 | Daughter | — | California |
| 31 | Charles C. Vaughn | 77 | Head | — | Illinois |
| 32 | Clara M. Vaughn | 67 | Wife | — | Illinois |
| 33 | Frances A. Munsell | 51 | Head | — | Germany |
| 34 | William D. Munsell | 16 | Son | — | Los Angeles |
| 35 | Hillin D. Wells | 45 | Head | Barber | Texas |
| 36 | Lina V. Wells | 40 | Wife | — | Arkansas |
| 37 | Dexter L. Wells | 15 | Daughter | — | Texas |
| 38 | Norma P. Wells | 13 | Daughter | — | Texas |
| 39 | William S. Sullivan | 24 | Head | Attendant | Texas |
| 40 | Jean Sullivan | 19 | Wife | — | Iowa |
Pedigree Summary
James
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)