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William Robbins — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this William Robbins across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 13-person household.
Age 17
b. ~1923
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Robbins |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1923 |
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.
13 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Theodore Ashby | Other | — | 3 | ~1937 |
| John Robbins | Son | — | 10 | ~1930 |
| Josephine Ferguson | Other | — | 53 | ~1887 |
| Juanita Ashby | Other | — | 24 | ~1916 |
| Dorothy Robbins | Daughter | — | 6 | ~1934 |
| James Robbins | Son | — | 15 | ~1925 |
| Marie Ashby | Other | — | 5 | ~1935 |
| Florence Robbins | Head | — | 35 | ~1905 |
| Fred Ferguson | Other | — | 20 | ~1920 |
| Josephine Robbins | Daughter | — | 9 | ~1931 |
| William Robbins | Son | — | 17 | ~1923 |
| Conchita Ashby | Other | — | 1 | ~1939 |
| Elmer Robbins | Son | — | 13 | ~1927 |
Census Appearances
1930
Cook, Illinois
Son, age 6
Cook, Illinois · implied b. ~1924 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Robbins |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Nebraska |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 17
Cook-County, Illinois · implied b. ~1923 — 13 household members
| Surname | Robbins |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Highest Grade | Hs 3 |
| 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 William Robbins across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Robbins
Son · 1940 · age 17 · b. ~1923 · Illinois
★ You are viewing this record
Sibling
John Robbins
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Josephine Robbins
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Robbins
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elmer Robbins
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Robbins
Sibling · 1940 · age 15
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-t0627-00924-00644)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Cooke | 26 | Son | Butcher | Alabama |
| 2 | Henry Cooke | 21 | Son | Laborer | Alabama |
| 3 | Cecil White | 51 | Son | Recreational Instructor | Illinois |
| 4 | Ruth White | 37 | Daughter | — | Alabama |
| 5 | Barbara White | 4 | Daughter | — | Illinois |
| 6 | Lucie Lewis | 22 | Daughter | — | Alabama |
| 7 | Joyce Lewis | 2 | Daughter | — | Illinois |
| 8 | Angela Lewis | 0 | Daughter | — | Illinois |
| 9 | John S. Burks | 61 | Head | Janitor | Alabama |
| 10 | Betty Burks | 51 | Wife | — | Mississippi |
| 11 | Ollie M. Mitchell | 35 | Daughter | — | Alabama |
| 12 | Mollie B. Murray | 54 | Sister | — | Alabama |
| 13 | Doc Littles | 28 | Lodger | — | Arkansas |
| 14 | James Fowler | 34 | Lodger | Laborer | Mississippi |
| 15 | Jessie Jones | 35 | Lodger | Laborer | Ohio |
| 16 | Florence Robbins | 35 | Head | — | Illinois |
| 17 | William Robbins THIS PERSON | 17 | Son | — | Illinois |
| 18 | James Robbins | 15 | Son | — | Illinois |
| 19 | Elmer Robbins | 13 | Son | — | Illinois |
| 20 | John Robbins | 10 | Son | — | Illinois |
| 21 | Josephine Robbins | 9 | Daughter | — | Illinois |
| 22 | Dorothy Robbins | 6 | Daughter | — | Illinois |
| 23 | Josephine Ferguson | 53 | Mother | — | Ohio |
| 24 | Fred Ferguson | 20 | Brother | Decorator | Ohio |
| 25 | Juanita Ashby | 24 | Lodger | — | Illinois |
| 26 | Marie Ashby | 5 | Lodger | — | Illinois |
| 27 | Theodore Ashby | 3 | Lodger | — | Illinois |
| 28 | Conchita Ashby | 1 | Lodger | — | Illinois |
| 29 | Fred Conway | 54 | Head | Butcher | Mississippi |
| 30 | Mary Brown | 43 | Lodger | — | Louisiana |
| 31 | Clarence Jones | 39 | Lodger | Laborer | Alabama |
| 32 | Marie Johnson | 35 | Lodger | Housework | Georgia |
| 33 | Earle Robinson | 40 | Lodger | Molder | Tennessee |
| 34 | Rose Alexander | 37 | Head | Housework | Tennessee |
| 35 | Louise Powell | 29 | Head | Seamstress | Louisiana |
| 36 | Gordon Powell | 17 | Son | — | Michigan |
| 37 | Dorothy Powell | 14 | Daughter | — | Illinois |
| 38 | Elaine Powell | 12 | Daughter | — | Illinois |
| 39 | Elizabeth Anderson | 19 | Head | — | Illinois |
| 40 | Joseph Anderson | 2 | Son | — | Illinois |
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)