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Robert Willis — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Robert Willis across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1932), then head of a 6-person household.
Age 8
b. ~1932
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Willis |
| Given Name | Robert Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | City - Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | No 1 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | City Chicago |
| Est. Birth Year | ~1932 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Ruthie Willis | Daughter | — | 12 | ~1928 |
| Raymond Willis | Son | — | 6 | ~1934 |
| Robert Willis | Head | — | 35 | ~1905 |
| Edward Willis | Son | — | 4 | ~1936 |
| Robert Willis | Son | — | 8 | ~1932 |
| Lenora Willis | Spouse | — | 34 | ~1906 |
Census Appearances
1930
Cook, Illinois
Other, age 1
Cook, Illinois · implied b. ~1929 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Willis |
| Given Name | Robert Jr. |
| Relationship to Head | Grandson |
| Sex | M |
| Color / Race | Black |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Georgia |
| Mother's Birthplace | Georgia |
| Occupation | none |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 8
Cook-County, Illinois · implied b. ~1932 — 6 household members
| Surname | Willis |
| Given Name | Robert Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | City - Chicago |
| 1935 Residence (County) | Cook |
| Highest Grade | No 1 |
| 1935 Residence | Same place |
| 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 Willis across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Willis
Son · 1940 · age 8 · b. ~1932 · Illinois
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Sibling
Raymond Willis
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Willis
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruthie Willis
Sibling · 1940 · age 12
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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00978-00476)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James Condon | 40 | Head | — | Alabama |
| 2 | Cornelia Condon | 50 | Wife | — | Mississippi |
| 3 | Dolores Condon | 9 | Daughter | — | Illinois |
| 4 | Norma J. Condon | 5 | Daughter | — | Illinois |
| 5 | Vivian Tart | 17 | Daughter | — | Illinois |
| 6 | Arthur Tart | 15 | Son | — | Illinois |
| 7 | David Tart | 14 | Step-son | — | Illinois |
| 8 | Beatrice Tart | 11 | Daughter | — | Illinois |
| 9 | Mary Skinner | 65 | Head | — | Kentucky |
| 10 | Ada Hall | 32 | Daughter | House Work | Tennessee |
| 11 | Wyman Hall | 15 | Grand-son | — | Illinois |
| 12 | Qurida Hall | 12 | Grand-daughter | — | Illinois |
| 13 | Mary Green | 48 | Head | — | Mississippi |
| 14 | Extra Line Extra Line | None | — | — | — |
| 15 | Extra Line Extra Line | None | — | — | — |
| 16 | Lucien Brown | 49 | Head | Galvanizer'S Helper | Tennessee |
| 17 | Carrie Brown | 39 | Wife | — | Tennessee |
| 18 | Kate Bradshaw | 67 | Head | — | Tennessee |
| 19 | Annie Ward | 21 | Daughter | — | Tennessee |
| 20 | Charles Ward | 2 | Grand-son | — | Illinois |
| 21 | Wayne Ward | 1 | Grand-son | — | Illinois |
| 22 | Robert Willis | 35 | Head | Coach Cleaner | Tennessee |
| 23 | Lenora Willis | 34 | Wife | — | Tennessee |
| 24 | Ruthie M. Willis | 12 | Daughter | — | Illinois |
| 25 | Robert Jr. Willis THIS PERSON | 8 | Son | — | Illinois |
| 26 | Raymond Willis | 6 | Son | — | Illinois |
| 27 | Edward Willis | 4 | Son | — | Illinois |
| 28 | Tilly Briden | 50 | Head | — | Illinois |
| 29 | Charles Brodersen | 53 | Brother | Salesman | Illinois |
| 30 | George Overall | 28 | Head | Laborer | Tennessee |
| 31 | Emma Overall | 27 | Wife | Laborer | Alabama |
| 32 | Anne O'Neil | 73 | Head | — | Illinois |
| 33 | John O'Neil | 53 | Son | Bus Driver | Illinois |
| 34 | Edward O'Neil | 50 | Son | Laborer | Illinois |
| 35 | Millard Parks | 46 | Head | Porter | N. Carolina |
| 36 | Gustavia Parks | 39 | Wife | House Cleaning | Kentucky |
| 37 | Blanch Parks | 23 | Daughter | Seamstress | Kentucky |
| 38 | Harris Warren | 47 | Head | Laborer | Alabama |
| 39 | Sally Warren | 47 | Wife | Seamstress | Alabama |
| 40 | Lola Murray | 49 | Head | Laundress | Mississippi |
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)