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Robert Williams — 1940 US Census Record
Model Tree available1940 United States Federal Census · Lake-County, Illinois
Our Model Tree links this Robert Williams across the 1920, 1930 and 1940 US Censuses in Lake-County, Illinois (XGBoost, ~Confirmed), with identified parents Robert & Robert — first a son (b.~1913), then head of a 8-person household.
Age 27
b. ~1913
Male
Son
Born: Washington
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Illinois |
| Surname | Williams |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | WAUKEGAN |
| 1935 Residence (County) | LAKE |
| Additional Details | |
| Occupation | Office Clerk |
| Industry | Fence Factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 266 |
| Highest Grade | C 2 |
| 1935 Residence | Same place |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| Occupation | Office Clerk |
| Township / Ward | Waukegan |
| Est. Birth Year | ~1913 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Williams | Daughter | — | 20 | ~1920 |
| Helen Williams | Daughter | — | 13 | ~1927 |
| Ruth Williams | Daughter | — | 22 | ~1918 |
| Robert Williams | Head | — | 53 | ~1887 |
| Leo Williams | Son | — | 25 | ~1915 |
| Donald Williams | Son | — | 12 | ~1928 |
| Robert Williams | Son | — | 27 | ~1913 |
| Mary Williams | Spouse | — | 53 | ~1887 |
Census Appearances
1920
Lake, Illinois
Son, age 8
Lake, Illinois · implied b. ~1912 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1930
Lake, Illinois
Son, age 17
Lake, Illinois · implied b. ~1913 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1940
Lake-County, Illinois
Son, age 27
Lake-County, Illinois · implied b. ~1913 — 8 household members
| Surname | Williams |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | WAUKEGAN |
| 1935 Residence (County) | LAKE |
| Occupation | Office Clerk |
| Industry | Fence Factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 266 |
| Highest Grade | C 2 |
| 1935 Residence | Same place |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
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 Robert Williams across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Robert Williams (~0.92 confidence) and father Robert Williams (~0.92 confidence) and father Robert Williams (~0.92 confidence) and mother Mary Williams (~0.92 confidence) and mother Mary Williams (~0.92 confidence) and mother Mae Williams (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Williams
b. ~1887
Source father
● Household
· direct · ~0.92
Father
Robert Williams
b. ~1887
Source father
● Household
· direct · ~0.92
Father
Robert Williams
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Mary Williams
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Mary Williams
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Mae Williams
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Williams
Son · 1940 · age 27 · b. ~1913 · Illinois
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Sibling
Leo Williams
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Williams
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Williams
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Williams
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Williams
Sibling · 1940 · age 12
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 — Lake-County, Illinois
Open full size
1940 US Federal Census — Lake-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00831-00021)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James Price | 50 | Head | Steamfitter | Michigan |
| 2 | Alice Price | 46 | Wife | — | Michigan |
| 3 | Lois Price | 51 | Daughter | Waitress | Michigan |
| 4 | Maxine Price | 18 | Daughter | — | Michigan |
| 5 | Nels Person | 72 | Head | — | Sweden |
| 6 | Alma Person | 71 | Wife | — | Sweden |
| 7 | Beatrice Pearce | 45 | Daughter | — | Illinois |
| 8 | Robert Mcdermott | 55 | Head | Proprietor | Illinois |
| 9 | Sadie Mcdermott | 46 | Wife | — | Illinois |
| 10 | William Mcdermott | 20 | Son | Service Man | Illinois |
| 11 | Patricia Mcdermott | 5 | Daughter | — | Illinois |
| 12 | George Mcdermott | 55 | Head | Proprietor | Illinois |
| 13 | Frances Mcdermott | 48 | Wife | — | Michigan |
| 14 | Alfred Burkert | 42 | Head | Bookkeeper | Indiana |
| 15 | Dolores Burkert | 36 | Wife | — | Indiana |
| 16 | Anthony Kuhs | 29 | Head | Laborer | Indiana |
| 17 | Anastasia Kuhs | 25 | Sister | Cook | Wisconsin |
| 18 | Robert Ash | 29 | Head | Corman | Iowa |
| 19 | Margaret Ash | 31 | Wife | — | Wisconsin |
| 20 | Peter Mcdermott | 32 | Head | Proprietor | Illinois |
| 21 | Esther Mcdermott | 30 | Wife | — | New York |
| 22 | Laurence Mcdermott | 6 | Son | — | Illinois |
| 23 | Robert Williams | 53 | Head | Inspector | Illinois |
| 24 | Mary Williams | 53 | Wife | — | Illinois |
| 25 | Robert Williams THIS PERSON | 27 | Son | Office Clerk | Washington |
| 26 | Leo Williams | 25 | Son | Tester | Illinois |
| 27 | Ruth Williams | 22 | Daughter | Secretary | Illinois |
| 28 | Elizabeth Williams | 20 | Daughter | Biller | Illinois |
| 29 | Donald Williams | 12 | Son | — | Illinois |
| 30 | Helen Williams | 13 | Daughter | — | Illinois |
| 31 | Carl Trommer | 38 | Head | Machinist | Germany |
| 32 | Germaine Trommer | 40 | Wife | — | Wisconsin |
| 33 | Rosemary Trommer | 8 | Daughter | — | Hawaii |
| 34 | Evelyn Trommer | 7 | Daughter | — | Louisiana |
| 35 | Virginia Trommer | 4 | Daughter | — | Illinois |
| 36 | Era Savage | 45 | Head | Binder | Illinois |
| 37 | Elsie Savage | 43 | Wife | — | Illinois |
| 38 | Donald Savage | 21 | Son | — | Illinois |
| 39 | Clifford Savage | 19 | Son | Gas Station Attendant | Illinois |
| 40 | Glen Savage | 17 | Son | Soda Fountain Attendant | Illinois |
Pedigree Summary
Robert + 5 siblings
Gen 1 · 6 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)