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John Ball — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this John Ball across the 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed) — first a son (b.~1924), then head of a 10-person household.
Age 16
b. ~1924
Male
Son
Born: Arizona
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Ball |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Arizona |
| 1935 Residence (City) | Los Angeles |
| 1935 Residence (County) | Los Angeles |
| Additional Details | |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
| Township / Ward | Los Angeles |
| Est. Birth Year | ~1924 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Charlotte Johnson | Daughter | — | 29 | ~1911 |
| Teather Ball | Daughter | — | 12 | ~1928 |
| Marjorie Ball | Daughter | — | 18 | ~1922 |
| Ernest Ball | Head | — | 53 | ~1887 |
| Ernest Johnson | Other | — | 9 | ~1931 |
| Carl Johnson | Other | — | 11 | ~1929 |
| John Ball | Son | — | 16 | ~1924 |
| Walter Ball | Son | — | 20 | ~1920 |
| Howard Ball | Son | — | 13 | ~1927 |
| Berta Ball | Spouse | — | 53 | ~1887 |
Census Appearances
1930
Los Angeles, …
Son, age 7
Los Angeles, California · implied b. ~1923 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Ball |
| Given Name | John A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Arizona |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
1940
Los-Angeles-County, California
Son, age 16
Los-Angeles-County, California · implied b. ~1924 — 10 household members
| Surname | Ball |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Arizona |
| 1935 Residence (City) | Los Angeles |
| 1935 Residence (County) | Los Angeles |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
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 John Ball across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Ball
Son · 1940 · age 16 · b. ~1924 · California
★ You are viewing this record
Sibling
Marjorie Ball
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Teather Ball
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Howard Ball
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Ball
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charlotte Johnson
Sibling · 1940 · age 29
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-t0627-00381-00661)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jacqueline Borquez | 13 | daughter | — | California |
| 2 | Frank Tracy | 46 | Head | Laborer | Italy |
| 3 | Elizabeth Tracy | 31 | Wife | — | Utah |
| 4 | Marie Tracy | 18 | daughter | — | Washington |
| 5 | Joseph Tracy | 17 | son | — | Washington |
| 6 | Kathleen Tracy | 15 | daughter | — | Washington |
| 7 | Frank Tracy | 46 | Head | Machinist | Connecticut |
| 8 | Ruth Tracy | 36 | Wife | — | Illinois |
| 9 | Robert Tracy | 15 | son | — | California |
| 10 | Otto Moles | 73 | Head | Barber | Italy |
| 11 | Maryalice Moles | 66 | Wife | — | Italy |
| 12 | Ernest S. Ball | 53 | Head | Cabinet Maker | New Hampshire |
| 13 | Berta Ball | 53 | Wife | — | Illinois |
| 14 | Walter Ball | 20 | son | Apprentice Cabinet Maker | Arizona |
| 15 | John Ball THIS PERSON | 16 | son | — | Arizona |
| 16 | Marjorie Ball | 18 | daughter | — | Arizona |
| 17 | Howard Ball | 13 | son | — | Arizona |
| 18 | Teather Ball | 12 | daughter | — | Arizona |
| 19 | Charlotte Johnson | 29 | daughter | Bookkeeper | California |
| 20 | Carl Johnson | 11 | grandson | — | Arizona |
| 21 | Ernest Johnson | 9 | grandson | — | California |
| 22 | Mildred Mccormick | 65 | Head | — | Iowa |
| 23 | Harold Johnson | 37 | son-in-law | Bakery Salesman | Illinois |
| 24 | Marie M. Johnson | 37 | daughter | — | Iowa |
| 25 | Sheila Johnson | 12 | daughter | — | California |
| 26 | Hall Hufstader | 36 | Head | Roofer | Texas |
| 27 | Florence Hufstader | 30 | daughter | Packer | California |
| 28 | Gerald Hufstader | 11 | son | — | California |
| 29 | Joaquin Aguilar | 38 | Head | Laborer | Mexico |
| 30 | Antonia Aguilar | 38 | Wife | — | Mexico |
| 31 | Ofelia Aguilar | 17 | daughter | — | Mexico |
| 32 | Alice Aguilar | 13 | daughter | — | Mexico |
| 33 | Ernestine Aguilar | 11 | daughter | — | California |
| 34 | Theresa Aguilar | 9 | daughter | — | California |
| 35 | Joaquin Jr. Aguilar | 6 | son | — | California |
| 36 | Le Alicia Aguilar | 3 | daughter | — | California |
| 37 | Jesus Camacho | 39 | Head | Janitor | Mexico |
| 38 | Helen Camacho | 32 | Wife | — | Mexico |
| 39 | Carmen Camacho | 10 | daughter | — | California |
| 40 | Jessie Camacho | 5 | daughter | — | California |
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)