JL
John Lewis — 1940 US Census Record
Model Tree available1940 United States Federal Census · Waukesha-County, Wisconsin
Our Model Tree links this John Lewis across the 1920, 1930 and 1940 US Censuses in Waukesha-County, Wisconsin (XGBoost, ~Confirmed), with identified parents Robert & Robert — first a son (b.~1915), then head of a 5-person household.
Age 25
b. ~1915
Male
Son
Born: Wisconsin
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Waukesha-County, Wisconsin |
| Surname | Lewis |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Waukesha City |
| 1935 Residence (County) | Waukesha |
| Additional Details | |
| Occupation | Machinist |
| Industry | Gasoline Engine |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1800 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Occupation | Machinist |
| Township / Ward | Waukesha City |
| Est. Birth Year | ~1915 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Robert Lewis | Head | — | 53 | ~1887 |
| Robert Lewis | Son | — | 20 | ~1920 |
| Lawrence Lewis | Son | — | 23 | ~1917 |
| John Lewis | Son | — | 25 | ~1915 |
| Laura Lewis | Spouse | — | 51 | ~1889 |
Census Appearances
1920
Waukesha, Wisconsin
Son, age 5
Waukesha, Wisconsin · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lewis |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Speaks English | Yes |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1930
Waukesha, Wisconsin
Son, age 16
Waukesha, Wisconsin · implied b. ~1914 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lewis |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Waukesha-County, Wisconsin
Son, age 25
Waukesha-County, Wisconsin · implied b. ~1915 — 5 household members
| Surname | Lewis |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Waukesha City |
| 1935 Residence (County) | Waukesha |
| Occupation | Machinist |
| Industry | Gasoline Engine |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1800 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
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 Lewis across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Robert Lewis (~0.92 confidence) and father Robert Lewis (~0.92 confidence) and mother Laura Lewis (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Lewis
b. ~1888
Source father
● Household
· direct · ~0.92
Father
Robert Lewis
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Laura Lewis
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Lewis
Son · 1940 · age 25 · b. ~1915 · Wisconsin
★ You are viewing this record
Sibling
Lawrence Lewis
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Lewis
Sibling · 1940 · age 20
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 — Waukesha-County, Wisconsin
Open full size
1940 US Federal Census — Waukesha-County, Wisconsin
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04534-00707)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Frank Thiel | 53 | Head | Machinist | Wisconsin |
| 42 | Louise Thiel | 42 | Wife | — | Wisconsin |
| 43 | Milton Thiel | 20 | Son | — | Wisconsin |
| 44 | Raymond Myers | 37 | Head | Professor | Indiana |
| 45 | Esther Myers | 41 | Wife | — | Indiana |
| 46 | Delberth Merten | 25 | Head | Printing Pressman | Wisconsin |
| 47 | Ruth Merten | 23 | Wife | — | Wisconsin |
| 48 | Frederick Merten | 29 | Brother | Office Work | Wisconsin |
| 49 | Charles Sayles | 51 | Head | Attendant | Wisconsin |
| 50 | Charlotte Sayles | 48 | Wife | — | Michigan |
| 51 | Ruth Sayles | 21 | Daughter | Book Binding | Wisconsin |
| 52 | Howard Sayles | 19 | Son | — | Canada English |
| 53 | Carol Sayles | 17 | Daughter | — | Canada English |
| 54 | Forrest Sayles | 16 | Son | — | Canada English |
| 55 | Katherine Sayles | 14 | Daughter | — | Canada English |
| 56 | Harriet Sayles | 12 | Daughter | — | Wisconsin |
| 57 | Lois Sayles | 9 | Daughter | — | Wisconsin |
| 58 | Jerome Sayles | 2 | Son | — | Wisconsin |
| 59 | Arthur Burke | 39 | Head | Machinist | Michigan |
| 60 | Helen Burke | 35 | Wife | Clerk | Wisconsin |
| 61 | Robert Burke | 15 | Son | — | Wisconsin |
| 62 | Gaylord Burke | 11 | Son | — | Wisconsin |
| 63 | Verhal Tuttle | 35 | Head | Moulder | Wisconsin |
| 64 | Evelyn Tuttle | 40 | Wife | — | Wisconsin |
| 65 | Joyce Tuttle | 13 | Daughter | — | Wisconsin |
| 66 | Robert Lewis | 53 | Head | Machinist | Wisconsin |
| 67 | Laura Lewis | 51 | Wife | — | Wisconsin |
| 68 | John Lewis THIS PERSON | 25 | Son | Machinist | Wisconsin |
| 69 | Lawrence Lewis | 23 | Son | Patternmaker | Wisconsin |
| 70 | Robert Jr. Lewis | 20 | Son | Toolroom | Wisconsin |
| 71 | Extra Line | None | — | — | — |
| 72 | Max Knaak | 65 | Head | Laborer | Germany |
| 73 | Amelia Knaak | 55 | Wife | — | Germany |
| 74 | Walter Knaak | 34 | Son | Caretaker | Wisconsin |
| 75 | Fred Plehn | 45 | Head | Bricklayer | Wisconsin |
| 76 | Gertrude Plehn | 44 | Wife | — | Wisconsin |
| 77 | Loren Plehn | 19 | Son | Farming | Wisconsin |
| 78 | Donald Plehn | 18 | Son | — | Wisconsin |
| 79 | Frederick Plehn | 16 | Son | — | Wisconsin |
| 80 | David Plehn | 4 | Son | — | Wisconsin |
Related Census Records
Pedigree Summary
John + 2 siblings
Gen 1 · 3 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)