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Clara Cook — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lasalle-County, Illinois
Our Model Tree links this Clara Cook across the 1930 and 1940 US Censuses in Lasalle-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1903), then head of a 9-person household.
Age 37
b. ~1903
Female
Spouse
Born: Austria
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Lasalle-County, Illinois |
| Surname | Cook |
| Given Name | Clara D. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Austria |
| 1935 Residence (City) | Ottawa City |
| 1935 Residence (County) | La Salle |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Proprietor |
| Industry | Grocery Store |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 50 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
| Occupation | Proprietor |
| Township / Ward | Ottawa City |
| Est. Birth Year | ~1903 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Clara | Age | Birth yr |
|---|---|---|---|---|
| John Cook | Son | — | 7 | ~1933 |
| Nick Cook | Son | — | 9 | ~1931 |
| Florence Cook | Daughter | — | 3 | ~1937 |
| Joseph Cook | Son | — | 5 | ~1935 |
| Clara Cook | Spouse | — | 37 | ~1903 |
| Magdalene Cook | Daughter | — | 11 | ~1929 |
| Steven Cook | Head | — | 47 | ~1893 |
| Frank Cook | Son | — | 16 | ~1924 |
| Peter Cook | Son | — | 1 | ~1939 |
Census Appearances
1930
La Salle, …
Daughter, age 27
La Salle, Illinois · implied b. ~1903 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Clara |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Austria |
| Naturalization Status | Naturalized |
| Year of Immigration | 1905 |
| Age at First Marriage | 26 |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Can Read/Write | Yes |
| Mother Tongue | German |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
1940
Lasalle-County, Illinois
Spouse, age 37
Lasalle-County, Illinois · implied b. ~1903 — 9 household members
| Surname | Cook |
| Given Name | Clara D. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Austria |
| 1935 Residence (City) | Ottawa City |
| 1935 Residence (County) | La Salle |
| Naturalization Status | Naturalized |
| Occupation | Proprietor |
| Industry | Grocery Store |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 50 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
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 Clara Cook across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Clara Cook
Spouse · 1940 · age 37 · b. ~1903 · 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 — Lasalle-County, Illinois
Open full size
1940 US Federal Census — Lasalle-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00834-00078)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Cecelia M. Conit | 10 | Daughter | — | Illinois |
| 2 | Lloyd Klesath | 28 | Head | Salesman | Illinois |
| 3 | Melba Klesath | 23 | Wife | — | Missouri |
| 4 | Melita D. Klesath | 1 | Daughter | — | Illinois |
| 5 | Gregory O. Martin | 63 | Head | Salesman | Missouri |
| 6 | Pearl O. Martin | 39 | Wife | Laundry | Missouri |
| 7 | Leola Martin | 19 | Daughter | Maid | Missouri |
| 8 | Cora Martin | 17 | Daughter | Clerk | Missouri |
| 9 | Louis Martin | 10 | Son | — | Illinois |
| 10 | Olga L. Martin | 2 | Daughter | — | Illinois |
| 11 | Frank Polancic | 69 | Head | — | Croatia |
| 12 | Catherine Polancic | 64 | Wife | — | Croatia |
| 13 | Steven Cook | 47 | Head | Off. Bearer | Romania |
| 14 | Clara D. Cook THIS PERSON | 37 | Wife | Proprietor | Austria |
| 15 | Frank Cook | 16 | Son | Newsboy | Illinois |
| 16 | Magdalene Cook | 11 | Daughter | — | Illinois |
| 17 | Nick Cook | 9 | Son | — | Illinois |
| 18 | John Cook | 7 | Son | — | Illinois |
| 19 | Joseph Cook | 5 | Son | — | Illinois |
| 20 | Florence Cook | 3 | Daughter | — | Illinois |
| 21 | Peter Cook | 1 | Son | — | Illinois |
| 22 | Charles Hellman | 39 | Head | Time Keeper | Illinois |
| 23 | Catherine Hellman | 33 | Wife | — | Oklahoma |
| 24 | Mary E. Hellman | 10 | Daughter | — | Illinois |
| 25 | Martina Hellman | 10 | Daughter | — | Illinois |
| 26 | Dolores A. Hellman | 5 | Daughter | — | Illinois |
| 27 | Charles Engel | 64 | Head | Laborer | Pennsylvania |
| 28 | Mary Engel | 57 | Wife | — | Illinois |
| 29 | Nicholas Engel | 31 | Son | Section Hand | Illinois |
| 30 | Michael Engel | 27 | Son | New Worker | Illinois |
| 31 | John Engel | 23 | Son | Laborer | Illinois |
| 32 | Marie Engel | 19 | Daughter | Nurse | Illinois |
| 33 | Patricia Engel | 15 | Daughter | — | Illinois |
| 34 | Joseph Bess | 64 | Lodger | Bill Poster | Illinois |
| 35 | Joseph Parks | 55 | Head | Section Hand | Illinois |
| 36 | Lee Pfau | 31 | Head | Examiner | Illinois |
| 37 | Anna Pfau | 30 | Wife | — | Illinois |
| 38 | Hattie Westerwelle | 54 | Mother-in-law | — | Illinois |
| 39 | Louis Rosier | 43 | Head | Dredger | Arkansas |
| 40 | Emma Rosier | 47 | Wife | — | Alabama |
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)