HW
Helen Williams — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Helen Williams across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Grace & Joseph — first a daughter (b.~1915), then head of a 3-person household.
Age 25
b. ~1915
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Williams |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Secretary |
| Industry | Metal Prodt. Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 880 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Secretary |
| Township / Ward | Chicago |
| 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 Helen | Age | Birth yr |
|---|---|---|---|---|
| Helen Williams | Daughter | — | 25 | ~1915 |
| Joseph Williams | Head | — | 54 | ~1886 |
| Isabel Williams | Spouse | — | 54 | ~1886 |
Census Appearances
1920
Cook, Illinois
Daughter, age 4
Cook, Illinois · implied b. ~1916 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| 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
Daughter, age 15
Cook, Illinois · implied b. ~1915 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 25
Cook-County, Illinois · implied b. ~1915 — 3 household members
| Surname | Williams |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Secretary |
| Industry | Metal Prodt. Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 880 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| 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 Helen Williams across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Grace Williams (~0.92 confidence) and father Joseph Williams (~0.92 confidence) and mother Isabel Williams (~0.92 confidence) and father Joseph Williams (~0.92 confidence) and mother Mildred Williams (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Grace Williams
b. ~1884
Source mother
● Household
· direct · ~0.92
Father
Joseph Williams
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Isabel Williams
b. ~1886
Source mother
● Household
· direct · ~0.92
Father
Joseph Williams
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Mildred Williams
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Helen Williams
Daughter · 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-t0627-00994-00192)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Harry Wisdom | 33 | Son | Manager | Illinois |
| 42 | Angela Wisdom | 35 | Wife | — | Illinois |
| 43 | George E. Wisdom | 10 | Grandson | — | Illinois |
| 44 | Carl R. Wisdom | 7 | Grandson | — | Illinois |
| 45 | Joan A. Wisdom | 5 | Granddaughter | — | Illinois |
| 46 | John M. Wisdom | 0 | Grandson | — | Illinois |
| 47 | Joseph Williams | 54 | Head | Maintainance Man | Illinois |
| 48 | Isabel Williams | 54 | Wife | — | Illinois |
| 49 | Helen Williams THIS PERSON | 25 | Daughter | Secretary | Illinois |
| 50 | Otto Mcbride | 33 | Head | Chief Clerk | Illinois |
| 51 | Helen Mcbride | 34 | Wife | — | Illinois |
| 52 | Morris Mcbride | 5 | Son | — | Illinois |
| 53 | Otto Jr. Mcbride | 2 | Son | — | Illinois |
| 54 | Roscoe Spiers | 50 | Head | Screw Machine Operator | Illinois |
| 55 | Ellen Spiers | 44 | Wife | — | Illinois |
| 56 | Ellen Spiers | 17 | Daughter | — | Illinois |
| 57 | Nicholas Hendricks | 47 | Head | Roofer | Illinois |
| 58 | Virginia Hendricks | 44 | Wife | — | Illinois |
| 59 | Walter Thern | 46 | Head | Glazier | Illinois |
| 60 | Clara Thern | 43 | Wife | — | Illinois |
| 61 | Fred Weber | 51 | Head | Machinist | Germany |
| 62 | Lillian Weber | 49 | Wife | — | Illinois |
| 63 | Richard C. Waterman | 44 | Head | Dentist | Illinois |
| 64 | Lotta Waterman | 45 | Wife | Teacher Of Music | Illinois |
| 65 | William Waterman | 12 | Son | — | Illinois |
| 66 | John Carlson | 57 | Head | Machinist | Sweden |
| 67 | Hanna Carlson | 47 | Wife | — | Sweden |
| 68 | Roy Carlson | 19 | Son | — | Illinois |
| 69 | Anna Lynch | 49 | Head | — | Ireland |
| 70 | Loretta Lynch | 43 | Daughter | Housework | Illinois |
| 71 | Frank Banducci | 58 | Head | Bartender | Illinois |
| 72 | Anna Banducci | 55 | Wife | — | Illinois |
| 73 | Nello Banducci | 34 | Son | Basket Maker | Illinois |
| 74 | Eugene Banducci | 33 | Son | Truck Driver | Illinois |
| 75 | Joseph S. Banducci | 25 | Son | Salesman | Illinois |
| 76 | John Curielli | 30 | Head | Bartender | Illinois |
| 77 | Amelia Curielli | 32 | Wife | — | California |
| 78 | John Jr. Curielli | 2 | Son | — | Illinois |
| 79 | William Duffy | 53 | Head | Plumber | Canada English |
| 80 | James Duffy | 47 | Brother | Tailor | Canada English |
Pedigree Summary
Helen
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)