WB
William Butler — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this William Butler across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents John & Josie — first a son (b.~1911), then head of a 4-person household.
Age 29
b. ~1911
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Butler |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Purchasing Agent |
| Industry | Alum. Mfg. |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 3000 |
| Highest Grade | C-4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Purchasing Agent |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1911 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Josie Butler | Head | — | 69 | ~1871 |
| William Butler | Son | — | 29 | ~1911 |
| Arthur Butler | Son | — | 44 | ~1896 |
| Albert Butler | Son | — | 44 | ~1896 |
Census Appearances
1920
Cook, Illinois
Son, age 7
Cook, Illinois · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Butler |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 17
Cook, Illinois · implied b. ~1913 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Butler |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Blue print |
| Industry | City of Chi |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 29
Cook-County, Illinois · implied b. ~1911 — 4 household members
| Surname | Butler |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Purchasing Agent |
| Industry | Alum. Mfg. |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 3000 |
| Highest Grade | C-4 |
| 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 Butler across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Butler (~0.92 confidence) and mother Josie Butler (~0.92 confidence) and mother Blanche Butler (~0.92 confidence) and father William Butler (~0.92 confidence) and mother Lillian Butler (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Butler
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Josie Butler
b. ~1871
Source mother
● Household
· direct · ~0.92
Mother
Blanche Butler
b. ~1875
Source mother
● Household
· direct · ~0.92
Father
William Butler
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Lillian Butler
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Butler
Son · 1940 · age 29 · b. ~1911 · Illinois
★ You are viewing this record
Sibling
Arthur Butler
Sibling · 1940 · age 44
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Albert Butler
Sibling · 1940 · age 44
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
37 people indexed on this census page (nara:1940:m-t0627-00937-00207)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Bryan | 43 | Head | Comptroller | Kansas |
| 2 | Nellie Bryan | 42 | Wife | — | Kansas |
| 3 | James Bryan | 13 | Son | — | Missouri |
| 4 | Donald Bryan | 10 | Son | — | Illinois |
| 5 | Effie Bryan | 65 | Sister | — | Illinois |
| 6 | Josie B. Butler | 69 | Head | — | Illinois |
| 7 | Albert Butler | 44 | Son | Stationery | Illinois |
| 8 | Arthur Butler | 44 | Son | Fireman | Illinois |
| 9 | William Butler THIS PERSON | 29 | Son | Purchasing Agent | Illinois |
| 10 | Howard Emerson | 39 | Head | Auditor | Missouri |
| 11 | Ruth Emerson | 39 | Wife | — | Illinois |
| 12 | Robert Emerson | 7 | Son | — | Illinois |
| 13 | Byron Hughes | 36 | Head | Tariff Clerk | Illinois |
| 14 | Minetta Hughes | 26 | Wife | — | Wisconsin |
| 15 | Ralph Hughes | 4 | Son | — | Illinois |
| 16 | Ronald Hughes | 1 | Son | — | Illinois |
| 17 | Milton Hughes | 39 | Brother | Deliveryman | Illinois |
| 18 | Knud Roobert | 56 | Head | Civil Engineer | Denmark |
| 19 | Alma Roobert | 50 | Wife | — | Denmark |
| 20 | Lee Rose | 43 | Head | Salesman | Iowa |
| 21 | Vera Rose | 40 | Wife | — | Minnesota |
| 22 | Lee Jr. Rose | 20 | Son | Car Attendant | Wisconsin |
| 23 | Mabelle Bronson | 63 | Mother-in-law | — | Michigan |
| 27 | Meyer Lipson | 40 | Head | Plumbing Contractor | Denver |
| 28 | Gwyn Lipson | 36 | Wife | Office Clerk | Egypt |
| 29 | Phillip Dolphin | 37 | Head | Salesman | Illinois |
| 30 | Ruth Dolphin | 35 | Wife | — | Michigan |
| 31 | Charlotte Dolphin | 10 | Daughter | — | Illinois |
| 32 | James Dolphin | 7 | Son | — | Illinois |
| 33 | Sue Dluzen | 22 | Servant | Servant | Illinois |
| 34 | John Q. Mitchell | 33 | Head | Salesman | Illinois |
| 35 | Lee Mitchell | 33 | Wife | — | Illinois |
| 36 | John Jr. Mitchell | 3 | Son | — | Illinois |
| 37 | Paul O'Brien | 33 | Head | Contractor | Illinois |
| 38 | Evelyn O'Brien | 30 | Wife | — | Illinois |
| 39 | Joan O'Brien | 7 | Daughter | — | Illinois |
| 40 | Betty Watson | 20 | Daughter | Model | Illinois |
Pedigree Summary
William + 2 siblings
Gen 1 · 5 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)