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William Lewis — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mariposa-County, California
Our Model Tree links this William Lewis across the 1920, 1930 and 1940 US Censuses in Mariposa-County, California (XGBoost, ~Confirmed), with identified parents William & Richard — first a son (b.~1918), then head of a 6-person household.
Age 22
b. ~1918
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mariposa-County, California |
| Surname | Lewis |
| Given Name | William M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Mariposa |
| 1935 Residence (County) | Mariposa |
| Additional Details | |
| Occupation | Truck Driver |
| Industry | Sawmill |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 540 |
| Highest Grade | H 2 |
| 1935 Residence | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Truck Driver |
| Township / Ward | Township 4 |
| 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Roberta Lewis | Daughter | — | 9 | ~1931 |
| Fay Lewis | Daughter | — | 15 | ~1925 |
| William Lewis | Head | — | 51 | ~1889 |
| William Lewis | Son | — | 22 | ~1918 |
| Le Lewis | Son | — | 17 | ~1923 |
| Ella Lewis | Spouse | — | 49 | ~1891 |
Census Appearances
1920
Mariposa, California
Son, age 2
Mariposa, California · implied b. ~1918 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lewis |
| Given Name | William W |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
Mariposa, California
Son, age 12
Mariposa, California · implied b. ~1918 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lewis |
| Given Name | William M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Mariposa-County, California
Son, age 22
Mariposa-County, California · implied b. ~1918 — 6 household members
| Surname | Lewis |
| Given Name | William M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Mariposa |
| 1935 Residence (County) | Mariposa |
| Occupation | Truck Driver |
| Industry | Sawmill |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 540 |
| Highest Grade | H 2 |
| 1935 Residence | California |
| 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 William Lewis across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Lewis (~0.92 confidence) and father Richard Lewis (~0.92 confidence) and father William Lewis (~0.92 confidence) and mother Ella Lewis (~0.92 confidence) and mother Effie Lewis (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Lewis
b. ~1875
Source father
● Household
· direct · ~0.92
Father
Richard Lewis
b. ~1877
Source father
● Household
· direct · ~0.92
Father
William Lewis
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Ella Lewis
b. ~1891
Source mother
● Household
· direct · ~0.92
Mother
Effie Lewis
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Lewis
Son · 1940 · age 22 · b. ~1918 · California
★ You are viewing this record
Sibling
Fay Lewis
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Le Lewis
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Roberta Lewis
Sibling · 1940 · age 9
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 — Mariposa-County, California
Open full size
1940 US Federal Census — Mariposa-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00262-00943)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles F. Smithers | 66 | Head | — | California |
| 2 | Mary A. Smithers | 55 | Wife | — | Missouri |
| 3 | Robert S. Mcelliott | 29 | Head | Bus Driver | California |
| 4 | Etta P. Mcelliott | 27 | Wife | — | California |
| 5 | Shirley J. Mcelliott | 5 | Daughter | — | California |
| 6 | Jean A. Mcelliott | 2 | Daughter | — | California |
| 7 | William M. Lewis | 51 | Head | Logger | California |
| 8 | Ella G. Lewis | 49 | Wife | — | California |
| 9 | William M. Lewis THIS PERSON | 22 | Son | Truck Driver | California |
| 10 | Le Roy H. Lewis | 17 | Son | Rider | California |
| 11 | Fay F. Lewis | 15 | Daughter | — | California |
| 12 | Roberta M. Lewis | 9 | Daughter | — | California |
| 13 | Ernest J. Summers | 39 | Head | Bus Driver | Iowa |
| 14 | Fanny G. Summers | 32 | Wife | — | Iowa |
| 15 | Dean Ted T. Summers | 24 | Boarder | Teacher | California |
| 16 | Lester N. Phillips | 41 | Head | Foreman | California |
| 17 | Edna M. Phillips | 37 | Wife | — | California |
| 18 | Hugh L. Phillips | 15 | Son | — | California |
| 19 | Leona R. Phillips | 13 | Daughter | — | California |
| 20 | William Mcwhinney | 47 | Head | Carpenter | Connecticut |
| 21 | Alta D. Mcwhinney | 43 | Wife | Postmistress | Maine |
| 22 | Douglas B. Mcwhinney | 18 | Son | Tree Planter | Connecticut |
| 23 | Alta R. Mcwhinney | 7 | Daughter | — | California |
| 24 | Newton J. Phillips | 69 | Head | Farmer | California |
| 25 | Nettie L. Phillips | 67 | Wife | — | California |
| 26 | Donald M. Phillips | 21 | Son | Laborer | California |
| 27 | Robert J. Haley | 26 | Head | Laborer | Arizona |
| 28 | Bessie M. Haley | 23 | Wife | — | Arizona |
| 29 | Robert J. Haley | 5 | Son | — | California |
| 30 | Phyllis M. Haley | 3 | Daughter | — | California |
| 31 | Marilyn G. Haley | 2 | Daughter | — | California |
| 32 | Fred S. Cummings | 65 | Head | Stonemason | Iowa |
| 33 | Mary F. Cummings | 60 | Wife | — | Colorado |
| 34 | George W. Mower | 64 | Head | Farmer | Ohio |
| 35 | Mildred V. Mower | 44 | Wife | — | Michigan |
| 36 | Gilbert J. Mower | 15 | Son | Laborer | California |
| 37 | Patricia J. Mower | 15 | Daughter | — | California |
| 38 | Benton B. Branson | 43 | Head | Foreman | California |
| 39 | Myrtle B. Branson | 39 | Wife | — | California |
| 40 | Daniel B. Branson | 19 | Son | Laborer | California |
Pedigree Summary
William + 3 siblings
Gen 1 · 5 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)