WP
William Pratt — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this William Pratt across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Elizabeth — first a head (b.~1900), then head of a 5-person household.
Age 40
b. ~1900
Male
Head
Born: England
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Pratt |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Draftsman |
| Industry | Elec. Supply |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1965 |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth Country | England |
| Birthplace (normalized) | england |
| Occupation | Draftsman |
| Township / Ward | Chicago |
| Est. Birth Year | ~1900 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Patricia Pratt | Daughter | — | 16 | ~1924 |
| Mary Pratt | Daughter | — | 14 | ~1926 |
| William Pratt | Head | — | 40 | ~1900 |
| William Pratt | Son | — | 10 | ~1930 |
| Anna Pratt | Spouse | — | 36 | ~1904 |
Census Appearances
1920
Cook, Illinois
Son, age 21
Cook, Illinois · implied b. ~1899 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pratt |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | England |
| Year of Immigration | 1910 |
| Naturalization Status | First papers filed |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Salesman |
| Industry | Auto Co. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
1930
Cook, Illinois
Head, age 30
Cook, Illinois · implied b. ~1900 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pratts |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | England |
| Naturalization Status | Naturalized |
| Year of Immigration | 1912 |
| Age at First Marriage | 23 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Detail Clerk |
| Industry | Marble Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 45 |
| Radio Set | R |
| Veteran | Yes |
| Birth Country | England |
| Birthplace (normalized) | england |
1940
Cook-County, Illinois
Head, age 40
Cook-County, Illinois · implied b. ~1900 — 5 household members
| Surname | Pratt |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | Draftsman |
| Industry | Elec. Supply |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1965 |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth Country | England |
| Birthplace (normalized) | england |
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 Pratt across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Elizabeth Pratt (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Elizabeth Pratt
b. ~1873
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Pratt
Head · 1940 · age 40 · b. ~1900 · 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-t0627-00947-00647)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Paul Walter | 33 | Head | Delivery Clerk | Illinois |
| 2 | Phyllis Walter | 31 | Wife | — | Illinois |
| 3 | Arthur Walter | 9 | Son | — | Illinois |
| 4 | Agnes Kole | 23 | Cousin | File Clerk | Illinois |
| 5 | Martha Grenier | 53 | Head | Seamstress | Illinois |
| 6 | Emilie Drake | 73 | Mother | — | Poland |
| 7 | Albert Drake | 56 | Brother | — | Illinois |
| 8 | William Pratt THIS PERSON | 40 | Head | Draftsman | England |
| 9 | Anna Pratt | 36 | Wife | — | Michigan |
| 10 | Patricia Pratt | 16 | Daughter | — | Illinois |
| 11 | Mary Pratt | 14 | Daughter | — | Illinois |
| 12 | William Pratt | 10 | Son | — | Illinois |
| 13 | William Eby | 44 | Head | Lather | Illinois |
| 14 | Rose Eby | 45 | Wife | — | New York |
| 15 | William E. Eby | 24 | Son | Appr. Lather | Illinois |
| 16 | Frances Eby | 22 | Daughter | Correspondent | Illinois |
| 17 | Mary Kenny | 42 | Aunt | — | Illinois |
| 18 | Thomas Pulham | 42 | Head | Sales Mgr. | Illinois |
| 19 | Marie Pulham | 43 | Wife | — | Illinois |
| 20 | Charles Pulham | 22 | Son | — | Illinois |
| 21 | Marie Pulham | 20 | Daughter | — | Illinois |
| 22 | William Schroll | 45 | Head | Policeman | Illinois |
| 23 | Helen Schroll | 43 | Wife | — | Illinois |
| 24 | William Schroll | 15 | Son | — | Illinois |
| 25 | Helen Schroll | 11 | Daughter | — | Illinois |
| 26 | Sophia Schaub | 72 | Mother | — | Germany |
| 27 | Fred Schaub | 41 | Brother | Car Inspector | Illinois |
| 28 | Herman Schultz | 67 | Head | Conductor | Germany |
| 29 | Hattie E. Schultz | 43 | Daughter | Operator | Illinois |
| 30 | Rudolph Plattner | 46 | Head | Motorman Street Car | Illinois |
| 31 | Sara Plattner | 46 | Wife | — | Illinois |
| 32 | Eugene Plattner | 7 | Son | — | Illinois |
| 33 | John P. Gronstall | 49 | Head | Fireman | Illinois |
| 34 | Bertha Gronstall | 47 | Wife | — | Illinois |
| 35 | Robert E. Gronstall | 24 | Son | Help. Slitting Machine | Illinois |
| 36 | Frederick Gronstall | 16 | Son | — | Illinois |
| 37 | Martin Clausen | 32 | Head | Commercial Dept. | Illinois |
| 38 | Marianne Clausen | 29 | Wife | — | Illinois |
| 39 | Marianne Clausen | 7 | Daughter | — | Illinois |
| 40 | Kathleen Clausen | 5 | Daughter | — | Illinois |
Pedigree Summary
William
Gen 1 · 1 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)