WC
William Cunningham — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this William Cunningham across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents John & Charles — first a head (b.~1915), then head of a 3-person household.
Age 25
b. ~1915
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Cunningham |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Molder |
| Industry | Bell Post Factory |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1300 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Molder |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1915 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| William Cunningham | Head | — | 25 | ~1915 |
| Burton Cunningham | Son | — | ~1940 | |
| Florence Cunningham | Spouse | — | 25 | ~1915 |
Census Appearances
1920
Cook, Illinois
Son, age 3
Cook, Illinois · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cunningham |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Mother Tongue | English |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 13
Cook, Illinois · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cunningham |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 25
Cook-County, Illinois · implied b. ~1915 — 3 household members
| Surname | Cunningham |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Molder |
| Industry | Bell Post Factory |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1300 |
| 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 Cunningham across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Cunningham (~0.92 confidence) and father Charles Cunningham (~0.92 confidence) and mother Mary Cunningham (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Cunningham
b. ~1888
Source father
● Household
· direct · ~0.92
Father
Charles Cunningham
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Mary Cunningham
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Cunningham
Head · 1940 · age 25 · b. ~1915 · 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 — 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-t0627-00940-00028)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William Mcclurg | 51 | Head | Mechanic | Scotland |
| 2 | Mary Mcclurg | 49 | Wife | — | Scotland |
| 3 | Mary Mcclurg | 22 | Daughter | Assistant | Scotland |
| 4 | William W. Mcclurg | 20 | Son | Paint Worker | Scotland |
| 5 | William Cunningham THIS PERSON | 25 | Head | Molder | Illinois |
| 6 | Florence Cunningham | 25 | Wife | — | Illinois |
| 7 | Burton Cunningham | 0 | Son | — | Illinois |
| 8 | John Rogers | 26 | Head | Operator | Indiana |
| 9 | Violet Rogers | 23 | Wife | — | Illinois |
| 10 | Enumeration This | 1940 | of | — | enumeration |
| 11 | Wendell Venediklasen | 33 | Head | Car Man | Michigan |
| 12 | Dorothy Venediklasen | 33 | Wife | — | Illinois |
| 13 | Dorothy Jean Venediklasen | 4 | Daughter | — | Illinois |
| 14 | Gust Anderson | 48 | Head | Carpenter | Sweden |
| 15 | Anna Anderson | 47 | Wife | — | Sweden |
| 16 | Arvid Anderson | 23 | Son | Machinist | Illinois |
| 17 | Arnold Anderson | 22 | Son | Machinist | Illinois |
| 18 | Dorothy Anderson | 20 | Daughter | — | Illinois |
| 19 | Tillie Zylstra | 70 | Head | — | Holland |
| 20 | Edward Zylstra | 45 | Son | Switchman | Illinois |
| 21 | Dorothy Zylstra | 24 | Daughter | — | Michigan |
| 22 | Margaret Zylstra | 1 | Daughter | — | Illinois |
| 23 | Jack Zylstra | 0 | Son | Butcher | Holland |
| 24 | Irving Beauchamp | 26 | Head | Steam Fitter | Illinois |
| 25 | Ruth Beauchamp | 25 | Wife | Clerk | Illinois |
| 26 | Denise Beauchamp | 2 | Daughter | — | Illinois |
| 27 | Tillie Beening | 65 | Mother | — | Illinois |
| 28 | Fred Fiddiske | 46 | Head | Foreman | Illinois |
| 29 | Lena Fiddiske | 46 | Wife | — | Illinois |
| 30 | Herbert Fiddiske | 23 | Son | Jr. Draftsman | Illinois |
| 31 | Bertil Leaf | 37 | Head | Baker | Sweden |
| 32 | Hilda Leaf | 42 | Wife | Clerk | Illinois |
| 33 | John Johnson | 80 | Father in Law | — | Sweden |
| 34 | Esther Johnson | 46 | Sister in Law | — | Illinois |
| 35 | Shirley Johnson | 16 | Daughter | — | Illinois |
| 36 | Herman Vink | 64 | Head | Woodworker | Holland |
| 37 | Emily Vink | 58 | Wife | — | Illinois |
| 38 | Robert Vink | 27 | Son | Clerk | Illinois |
| 39 | Raymond Vink | 14 | Son | — | Illinois |
| 40 | Elmer Vink | 21 | Son | Machinist | Illinois |
Pedigree Summary
William
Gen 1 · 3 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)