HC
Helen Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this Helen Clark across the 1920, 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed), with identified parents Chauncey & Nelle — first a daughter (b.~1918), then head of a 3-person household.
Age 22
b. ~1918
Female
Daughter
Born: Missouri
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Clark |
| Given Name | Helen N. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Long Beach City |
| 1935 Residence (County) | Los Angeles |
| Additional Details | |
| Occupation | Truck driver |
| Industry | Oil Company |
| Class of Worker | PW |
| Income (1939) | 1680 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Occupation | Truck Driver |
| Township / Ward | Long Beach City |
| Est. Birth Year | ~1918 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Helen | Age | Birth yr |
|---|---|---|---|---|
| Helen Clark | Daughter | — | 22 | ~1918 |
| Chauncey Clark | Head | — | 56 | ~1884 |
| Chauncey Clark | Son | — | 18 | ~1922 |
Census Appearances
1920
Los Angeles, …
Daughter, age 2
Los Angeles, California · implied b. ~1918 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Helen R |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Missouri |
| Occupation | none |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1930
Los Angeles, …
Daughter, age 13
Los Angeles, California · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Helen N |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Missouri |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Los-Angeles-County, California
Daughter, age 22
Los-Angeles-County, California · implied b. ~1918 — 3 household members
| Surname | Clark |
| Given Name | Helen N. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Long Beach City |
| 1935 Residence (County) | Los Angeles |
| Occupation | Truck driver |
| Industry | Oil Company |
| Class of Worker | PW |
| Income (1939) | 1680 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Helen Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Chauncey Clark (~0.92 confidence) and mother Nelle Clark (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Chauncey Clark
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Nelle Clark
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Helen Clark
Daughter · 1940 · age 22 · b. ~1918 · California
★ You are viewing this record
Sibling
Chauncey Clark
Sibling · 1940 · age 18
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
36 people indexed on this census page (nara:1940:m-t0627-00368-00522)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank Davenport | 36 | Head | Aquatic Supervisor | New Jersey |
| 2 | Marjorie Davenport | 34 | Wife | — | Minnesota |
| 3 | Clarence B. Bennett | 47 | Head | Oil Gauger | Texas |
| 4 | Margaret Bennett | 45 | Wife | — | Louisiana |
| 5 | William Bennett | 40 | Brother | Clerk - Office | Texas |
| 6 | Charles W. Morse | 54 | Head | Carpenter | California |
| 7 | Edythe Morse | 50 | Wife | — | California |
| 8 | Nadine Morse | 8 | Daughter | — | California |
| 9 | Alice C. Johnson | 45 | Head | — | Illinois |
| 10 | Edwin Stubbs | 76 | Father | — | Illinois |
| 11 | Harriet Stubbs | 75 | Mother | — | Illinois |
| 12 | Otis W. Fogle | 33 | Lodger | Stevedore | Maryland |
| 13 | Ernest H. Fogle | 30 | Lodger | Stevedore | Maryland |
| 14 | John G. Kahler | 57 | Head | Carpenter | Texas |
| 15 | Rosa Kahler | 52 | Wife | — | Texas |
| 16 | John Kahler | 25 | Son | — | Texas |
| 17 | Ruth Kahler | 20 | Daughter | — | California |
| 18 | Ruby Kahler | 20 | Daughter | — | California |
| 19 | John D. Jacobs | 60 | Head | Salesman | Delaware |
| 20 | Sue Jacobs | 57 | Wife | — | Solarplan |
| 21 | Chauncey E. Clark | 56 | Head | Truck Driver | Illinois |
| 22 | Helen N. Clark THIS PERSON | 22 | Daughter | Truck Driver | Missouri |
| 23 | Chauncey C. Clark | 18 | Son | — | California |
| 24 | John Kissel | 25 | Head | Aviator | Illinois |
| 25 | Carolyn Kissel | 24 | Wife | — | California |
| 26 | Winifred Klepper | 44 | Head | Inspector | California |
| 27 | Florence Klepper | 44 | Wife | — | California |
| 28 | Allan E. Douglas | 47 | Head | Police Officer | Idaho |
| 29 | Levonne Douglas | 44 | Wife | — | Idaho |
| 30 | Allan E. Jr. Douglas | 18 | Son | — | California |
| 31 | Lewis K. Ely | 51 | Head | Broker | Kansas |
| 32 | Leona S. Ely | 50 | Wife | — | Iowa |
| 33 | Robert Arnold | 27 | Head | Salesman | California |
| 34 | Zella Arnold | 26 | Wife | Public Librarian | California |
| 35 | Marianne Arnold | 1 | Daughter | — | California |
| 36 | Ralph C. Brown | 44 | Head | Gas Man | Iowa |
Pedigree Summary
Helen + 1 sibling
Gen 1 · 2 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)