RL
Robert Lewis — 1940 US Census Record
Model Tree available1940 United States Federal Census · St.-Clair-County, Illinois
Our Model Tree links this Robert Lewis across the 1920, 1930 and 1940 US Censuses in St.-Clair-County, Illinois (XGBoost, ~Confirmed), with identified parents Albert & Robert — first a son (b.~1906), then head of a 3-person household.
Age 34
b. ~1906
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Clair-County, Illinois |
| Surname | Lewis |
| Given Name | Robert S. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Belleville |
| 1935 Residence (County) | St. Clair |
| Additional Details | |
| Occupation | Asst. Credit Man |
| Industry | Fertilizer Factory |
| Class of Worker | PW |
| Income (1939) | 1820 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Asst. Credit Man |
| Township / Ward | Belleville |
| Est. Birth Year | ~1906 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Albert Lewis | Head | — | 60 | ~1880 |
| Robert Lewis | Son | — | 34 | ~1906 |
| Minnie Lewis | Spouse | — | 56 | ~1884 |
Census Appearances
1920
St Clair, …
Son, age 13
St Clair, 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 | Iowa |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
St Clair, …
Son, age 24
St Clair, Illinois · implied b. ~1906 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lewis |
| Given Name | Robert S. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Iowa |
| Occupation | Office Manager |
| Industry | Fertilizer Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
St.-Clair-County, Illinois
Son, age 34
St.-Clair-County, Illinois · implied b. ~1906 — 3 household members
| Surname | Lewis |
| Given Name | Robert S. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Belleville |
| 1935 Residence (County) | St. Clair |
| Occupation | Asst. Credit Man |
| Industry | Fertilizer Factory |
| Class of Worker | PW |
| Income (1939) | 1820 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Albert Lewis (~0.92 confidence) and father Robert Lewis (~0.92 confidence) and father R Lewis (~0.92 confidence) and mother Minnie Lewis (~0.92 confidence) and mother Minnie Lewis (~0.92 confidence) and mother Minnie Lewis (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Albert Lewis
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Robert Lewis
b. ~1880
Source father
● Household
· direct · ~0.92
Father
R Lewis
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Minnie Lewis
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Minnie Lewis
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Minnie Lewis
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Lewis
Son · 1940 · age 34 · b. ~1906 · 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 — St.-Clair-County, Illinois
Open full size
1940 US Federal Census — St.-Clair-County, Illinois
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00878-00545)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Walter B. Sentiss | 29 | Head | Utility Man | Illinois |
| 42 | Mary Sentiss | 25 | Wife | Machine Oprtr | Illinois |
| 43 | Allen B. Johnson | 48 | Head | Asst Engineer | Missouri |
| 44 | Murl S. Johnson | 45 | Wife | — | Missouri |
| 45 | Enos T. Westrich | 29 | Head | Clerk | Missouri |
| 46 | Blanche Westrich | 26 | Wife | — | Missouri |
| 47 | Theodore Westrich | 5 | Son | — | Indiana |
| 48 | Arlene Westrich | 2 | Daughter | — | Indiana |
| 49 | Robert Westrich | 1 | Son | — | Illinois |
| 50 | Robert W. Henson | 34 | Head | Salesman | Illinois |
| 51 | Jennie Henson | 35 | Wife | — | Illinois |
| 52 | Geraldine Henson | 13 | Daughter | — | Illinois |
| 53 | Ruth Jean Henson | 5 | Daughter | — | Illinois |
| 54 | Albert F. Lewis | 60 | Head | Maintenance Man | Illinois |
| 55 | Minnie Lewis | 56 | Wife | — | Iowa |
| 56 | Robert S. Lewis THIS PERSON | 34 | Son | Asst. Credit Man | Iowa |
| 57 | Beatrice Cantrell | 36 | Head | — | Illinois |
| 58 | Albert Jondro | 26 | Son | Chemist | Illinois |
| 59 | Audrey Jondro | 25 | Daughter | Stenographer | Illinois |
| 60 | Walter B. Ellis | 51 | Head | Freight Clerk | Illinois |
| 61 | Roy M. Simmons | 38 | Head | Cattle Driver | Illinois |
| 62 | Alma Simmons | 36 | Wife | — | Illinois |
| 63 | Robert Simmons | 11 | Son | — | Illinois |
| 64 | Elijah C. Cox | 55 | Head | Locomotive Engineer | Illinois |
| 65 | Esther Cox | 53 | Wife | — | Illinois |
| 66 | Ella Miller | 65 | Head | — | Missouri |
| 67 | Aretha Miller | 33 | Daughter | Seamstress | Missouri |
| 68 | Charles Miller | 15 | Son | — | Illinois |
| 69 | Wallace Miller | 12 | Son | — | Illinois |
| 70 | Miller | None | — | — | — |
| 71 | Clarence Jenks | 62 | Head | Secretary | Pennsylvania |
| 72 | Mary Jenks | 45 | Wife | Conductor (Music) | New York |
| 73 | James J. Donahue | 42 | Head | Medical Doctor | Illinois |
| 74 | Eva Donahue | 40 | Wife | — | Illinois |
| 75 | James P. Donahue | 9 | Son | — | Illinois |
| 76 | Dan J. Donahue | 8 | Son | — | Illinois |
| 77 | Brigid E. Donahue | 0 | Daughter | — | Missouri |
| 78 | Elizabeth Jones | 32 | Maid | House Maid | Tennessee |
| 79 | Edgar D. Mayne | 40 | Head | Safety Engineer | Illinois |
Pedigree Summary
Robert
Gen 1 · 6 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)