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Robert Lewis — 1940 US Census Record
Model Tree available1940 United States Federal Census · Rock-Island-County, Illinois
Our Model Tree links this Robert Lewis across the 1920, 1930 and 1940 US Censuses in Rock-Island-County, Illinois (XGBoost, ~Confirmed), with identified parents Robert & Rosa — first a head (b.~1907), then head of a 4-person household.
Age 33
b. ~1907
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Rock-Island-County, Illinois |
| Surname | Lewis |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Rock Island |
| Additional Details | |
| Occupation | machine worker |
| Industry | farm implement factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1150 |
| Highest Grade | No 8 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Machine Worker |
| Township / Ward | Hampton Township |
| Est. Birth Year | ~1907 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Barbara Lewis | Daughter | — | 9 | ~1931 |
| Janet Lewis | Daughter | — | 2 | ~1938 |
| Robert Lewis | Head | — | 33 | ~1907 |
| Edna Lewis | Spouse | — | 32 | ~1908 |
Census Appearances
1920
Rock Island, …
Son, age 13
Rock Island, Illinois · implied b. ~1907 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lewis |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Rock Island, …
Son, age 23
Rock Island, Illinois · implied b. ~1907 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lewis |
| Given Name | Robert |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Laborer |
| Industry | implement factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Rock-Island-County, Illinois
Head, age 33
Rock-Island-County, Illinois · implied b. ~1907 — 4 household members
| Surname | Lewis |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Rock Island |
| Occupation | machine worker |
| Industry | farm implement factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1150 |
| Highest Grade | No 8 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Robert 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 mother Rosa Lewis (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Lewis
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Rosa Lewis
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Lewis
Head · 1940 · age 33 · b. ~1907 · Illinois
★ 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 — Rock-Island-County, Illinois
Open full size
1940 US Federal Census — Rock-Island-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00874-00786)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John Nidig | 31 | Head | Well Driller | Iowa |
| 42 | Mattie Nidig | 28 | Wife | None | Kentucky |
| 43 | Anna Belle Wegern | 8 | Sister-in-law | — | Kentucky |
| 44 | William Wegern | 26 | Head | Punch Press Operator | Kentucky |
| 45 | Ruby Wegern | 24 | Wife | None | Iowa |
| 46 | Steele Willard | 65 | Head | — | Illinois |
| 47 | Helbert Willard | 40 | Son | Farmer | Illinois |
| 48 | Herbert Wickinson | 38 | Son-in-law | Cupola Tender | Illinois |
| 49 | Steele Wickinson | 26 | Daughter | None | Illinois |
| 50 | Sheila Rae Wickinson | 1 | Granddaughter | — | Illinois |
| 51 | Carroll Colegrove | 61 | Head | Carpenter Farmer | Illinois |
| 52 | Ara Colegrove | 51 | Wife | None | New York |
| 53 | Alfons Van De Doncker | 58 | Head | Farmer | Belgium |
| 54 | Erma Van De Doncker | 57 | Wife | None | Belgium |
| 55 | Robert Van De Doncker | 20 | Son | Keeper | Belgium |
| 56 | Viola Hanna | 41 | Head | Attendant | Illinois |
| 57 | Raymond Fulscher | 25 | Son-in-law | Plumber | Illinois |
| 58 | Donna Mae Fulscher | 20 | Daughter | None | Illinois |
| 59 | Emiel Jacques | 58 | Head | Farmer | Belgium |
| 60 | Aurelia Jacques | 58 | Wife | None | Belgium |
| 61 | Rachel Jacques | 24 | Daughter | Chip Caster | Illinois |
| 62 | Jerome Jacques | 21 | Son | Farm Hand | Illinois |
| 63 | Margaret Jacques | 19 | Daughter | Keeper | Illinois |
| 64 | Boyd Mcmichael | 73 | Head | Farmer | Pennsylvania |
| 65 | Grace Mcmichael | 70 | Wife | None | Illinois |
| 66 | Julia Morehart | 40 | Daughter | Reporter | Illinois |
| 67 | Richard Morehart | 12 | Grandson | — | Colorado |
| 68 | Marylee Morehart | 9 | Granddaughter | — | Colorado |
| 69 | Betty Butzer | 19 | Daughter | Helper | Illinois |
| 70 | George Hofsteter | 57 | Head | Farmer | Illinois |
| 71 | Anna Hofsteter | 55 | Wife | None | Illinois |
| 72 | Nora Lewis | 56 | Head | None | Illinois |
| 73 | Le Roy Lewis | 31 | Son | Assembler | Illinois |
| 74 | Robert Lewis THIS PERSON | 33 | Head | Machine Worker | Illinois |
| 75 | Edna Lewis | 32 | Wife | None | Illinois |
| 76 | Barbara Lewis | 9 | Daughter | — | Illinois |
| 77 | Janet Lewis | 2 | Daughter | — | Illinois |
| 78 | J. Elliott Colclasure | 35 | Head | Machine Operator | Illinois |
| 79 | Martha Anna Colclasure | 30 | Wife | Supervisor | Illinois |
| 80 | Earl M. Clark | 21 | Head | Laborer | Illinois |
Pedigree Summary
Robert
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)