WG
William Gill — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this William Gill across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1924), then head of a 6-person household.
Age 16
b. ~1924
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Gill |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1924 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| James Gill | Son | — | 17 | ~1923 |
| William Gill | Son | — | 16 | ~1924 |
| Patricia Gill | Daughter | — | 15 | ~1925 |
| Caroline Gill | Spouse | — | 42 | ~1898 |
| James Gill | Head | — | 46 | ~1894 |
| Kenneth Gill | Son | — | 8 | ~1932 |
Census Appearances
1930
Cook, Illinois
Son, age 5
Cook, Illinois · implied b. ~1925 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Giel |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Russia |
| Mother's Birthplace | Russia |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 16
Cook-County, Illinois · implied b. ~1924 — 6 household members
| Surname | Gill |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Highest Grade | No 6 |
| 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 Gill across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Gill
Son · 1940 · age 16 · b. ~1924 · Illinois
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Sibling
James Gill
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kenneth Gill
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Gill
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-t0627-00938-00859)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Donald De Haan | 10 | Son | — | Illinois |
| 42 | Arthur Dillman | 53 | Head | Salesman | Illinois |
| 43 | Emily Dillman | 46 | Wife | — | Indiana |
| 44 | Abel De Haan | 37 | Head | Attorney | Illinois |
| 45 | Grace De Haan | 37 | Wife | — | Illinois |
| 46 | Frank Liora | 52 | Head | Laborer | Italy |
| 47 | Rose Liora | 42 | Wife | — | Italy |
| 48 | Louis Liora | 13 | Son | — | Illinois |
| 49 | Sivolio Di Lorenzo | 40 | Cousin | Laborer | Italy |
| 50 | James Gill | 46 | Head | Clerk, Office | Illinois |
| 51 | Caroline Gill | 42 | Wife | — | Illinois |
| 52 | James Jr. Gill | 17 | Son | — | Illinois |
| 53 | William Gill THIS PERSON | 16 | Son | — | Illinois |
| 54 | Patricia Gill | 15 | Daughter | — | Illinois |
| 55 | Kenneth Gill | 8 | Son | — | Illinois |
| 56 | Stanley Oakilance | 30 | Head | Inspector | Maine |
| 57 | Michelle Oakilance | 27 | Wife | — | Illinois |
| 58 | Shirley May Oakilance | 1 | Daughter | — | Illinois |
| 59 | Charles Connell | 64 | Head | First Watchman | New York |
| 60 | Anna Connell | 60 | Wife | — | Germany |
| 61 | Mary Jane Konisch | 22 | Niece | Packer | Illinois |
| 62 | Michael Mason | 49 | Head | Locomotive Engineer | Lithuania |
| 63 | Edna Mason | 42 | Wife | — | Illinois |
| 64 | Warren Mason | 13 | Son | — | Illinois |
| 65 | Norma Mason | 9 | Daughter | — | Illinois |
| 66 | Ruth Mason | 5 | Daughter | — | Illinois |
| 67 | Louis Joy | 42 | Head | Ticket Agent | Illinois |
| 68 | Irene Joy | 42 | Wife | — | Illinois |
| 69 | Betty Lou Joy | 12 | Daughter | — | Illinois |
| 70 | Frank Stemper | 51 | Head | Car Cleaning | Germany |
| 71 | Susan Stemper | 44 | Wife | — | Pennsylvania |
| 72 | Louis Stemper | 24 | Son | Bricklayer Helper | Illinois |
| 73 | Steve Stemper | 20 | Son | Factory Hand | Illinois |
| 74 | Elizabeth Stemper | 16 | Daughter | — | Illinois |
| 75 | Susan Stemper | 14 | Daughter | — | Illinois |
| 76 | Helen Stemper | 13 | Daughter | — | Illinois |
| 77 | Paul Reichel | 38 | Head | Repair Man | Hungary |
| 78 | Julia Reichel | 32 | Wife | — | Illinois |
| 79 | Clara Reichel | 10 | Daughter | — | Illinois |
| 80 | Paul Reichel | 6 | 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)