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Harold Williams — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Rock-Island-County, Illinois
Our Model Tree links this Harold Williams across the 1920, 1930 and 1940 US Censuses in Rock-Island-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1891), then head of a 4-person household.
Age 49
b. ~1891
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Rock-Island-County, Illinois |
| Surname | Williams |
| Given Name | Harold H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Port Byron |
| 1935 Residence (County) | Rock Island |
| Additional Details | |
| Occupation | Photographer |
| Industry | Own Business |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 1000 |
| Highest Grade | No 4-1 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Photographer |
| Township / Ward | Moline City |
| Est. Birth Year | ~1891 |
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 Harold | Age | Birth yr |
|---|---|---|---|---|
| Ida Williams | Daughter | — | 23 | ~1917 |
| Harold Williams | Head | — | 49 | ~1891 |
| Marista Lueck | Other | — | 13 | ~1927 |
| Vera Williams | Spouse | — | 46 | ~1894 |
Census Appearances
1920
Rock Island, …
Head, age 29
Rock Island, Illinois · implied b. ~1891 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Harold |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Photographer |
| Industry | Business for self |
| Class of Worker | E |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Rock Island, …
Head, age 39
Rock Island, Illinois · implied b. ~1891 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Harold K |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 20 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Photographer |
| Industry | Private studio |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 900 |
| Radio Set | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Rock-Island-County, Illinois
Head, age 49
Rock-Island-County, Illinois · implied b. ~1891 — 4 household members
| Surname | Williams |
| Given Name | Harold H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Port Byron |
| 1935 Residence (County) | Rock Island |
| Occupation | Photographer |
| Industry | Own Business |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 1000 |
| Highest Grade | No 4-1 |
| 1935 Residence | Illinois |
| 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 Harold Williams across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Harold Williams
Head · 1940 · age 49 · b. ~1891 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Rock-Island-County, Illinois
Open full size
1940 US Federal Census — Rock-Island-County, Illinois
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-00875-00274)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph W. Hemenway | 56 | Lodger | Salesman | Illinois |
| 2 | Edith M. D. Fisher | 43 | Lodger | Program Dir. | Iowa |
| 5 | Sol Hirsch | 75 | Head | — | New York |
| 6 | Nellie Hirsch | 68 | Wife | — | Iowa |
| 7 | Antoinette Dierick | 65 | Head | — | Illinois |
| 8 | William W. Stevens | 48 | Head | R.R. Blacksmith | Minnesota |
| 9 | Agnes H. Stevens | 41 | Wife | — | Illinois |
| 10 | William J. Stevens | 12 | Son | — | Illinois |
| 11 | John A. Heck | 45 | Head | Baker | Iowa |
| 12 | Ethel M. Heck | 42 | Wife | — | Illinois |
| 13 | David A. Heck | 13 | Son | — | Illinois |
| 14 | Andrew V. Larson | 37 | Head | Pattern Maker | Sweden |
| 15 | Florence B. Larson | 36 | Wife | — | Illinois |
| 16 | Lester A. Larson | 10 | Son | — | Illinois |
| 17 | Dorothy J. Larson | 7 | Daughter | — | Illinois |
| 18 | Regina D. Anderson | 49 | Head | Cook | Sweden |
| 19 | Margaret Anderson | 19 | Daughter | Telephone Oper. | Illinois |
| 20 | Lottie F. Nelson | 74 | Head | — | Sweden |
| 21 | Edna Nelson | 52 | Daughter | Binder | Illinois |
| 22 | Harold H. Williams THIS PERSON | 49 | Head | Photographer | Illinois |
| 23 | Vera P. Williams | 46 | Wife | — | Illinois |
| 24 | Ida Mae B. Williams | 23 | Daughter | Division Head | Iowa |
| 25 | Marista Lueck | 13 | Lodger | — | Illinois |
| 26 | Lawrence A. Bracker | 38 | Head | Lathe Operator | Iowa |
| 27 | Marguerite Bracker | 33 | Wife | — | Illinois |
| 28 | Lawrence J. Bracker | 9 | Son | — | Illinois |
| 29 | Joyce V. Bracker | 8 | Daughter | — | Illinois |
| 30 | Jay L. Bracker | 7 | Son | — | Illinois |
| 31 | Jo Ann Bracker | 6 | Daughter | — | Illinois |
| 33 | Walter C. Vark | 57 | Head | Janitor | Illinois |
| 34 | Margaret E. Vark | 58 | Wife | — | Illinois |
| 35 | Charles M. Vark | 27 | Son | — | Illinois |
| 36 | Walter R. Vark | 20 | Son | Steel Cutter | Illinois |
| 37 | Otto A. Martinson | 58 | Head | Bench Worker | Sweden |
| 38 | Phoebe R. Martinson | 49 | Wife | — | Illinois |
| 39 | Clarence A. Warslow | 48 | Head | Drop Hammer Op. | Iowa |
| 40 | Gretta B. Warslow | 45 | Wife | — | Michigan |
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)