EC
Elizabeth Cook — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lake-County, Illinois
Our Model Tree links this Elizabeth Cook across the 1930 and 1940 US Censuses in Lake-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 9-person household.
Age 16
b. ~1924
Female
Daughter
Born: Canada-Eng
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Illinois |
| Surname | Cook |
| Given Name | Elizabeth J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Canada-Eng |
| 1935 Residence (City) | Waukegan City |
| 1935 Residence (County) | Lake |
| Naturalization Status | First papers filed |
| Additional Details | |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birthplace (normalized) | canada-eng |
| Township / Ward | Waukegan City |
| Est. Birth Year | ~1924 |
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 Elizabeth | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Cook | Daughter | — | 16 | ~1924 |
| Elizabeth Jones | Daughter | — | ~1940 | |
| Christine Jones | Daughter | — | 20 | ~1920 |
| Ines Jones | Daughter | — | 2 | ~1938 |
| Jordan Cook | Head | — | 56 | ~1884 |
| Gilbert Jones | Other | — | 26 | ~1914 |
| Thomas Cook | Son | — | 17 | ~1923 |
| Robert Cook | Son | — | 14 | ~1926 |
| Elizabeth Cook | Spouse | — | 45 | ~1895 |
Census Appearances
1930
Lake, Illinois
Daughter, age 6
Lake, Illinois · implied b. ~1924 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooke |
| Given Name | Elizabeth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Canada-Eng |
| Naturalization Status | Alien |
| Year of Immigration | 1925 |
| Father's Birthplace | Canada-Eng |
| Mother's Birthplace | Scotland |
| Occupation | none |
| Mother Tongue | English |
| Birthplace (normalized) | canada-eng |
1940
Lake-County, Illinois
Daughter, age 16
Lake-County, Illinois · implied b. ~1924 — 9 household members
| Surname | Cook |
| Given Name | Elizabeth J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Canada-Eng |
| 1935 Residence (City) | Waukegan City |
| 1935 Residence (County) | Lake |
| Naturalization Status | First papers filed |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birthplace (normalized) | canada-eng |
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 Elizabeth Cook across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Elizabeth Cook
Daughter · 1940 · age 16 · b. ~1924 · Illinois
★ You are viewing this record
Sibling
Ines Jones
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Cook
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Christine Jones
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Cook
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Jones
Sibling · 1940 · age
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-t0627-00831-00329)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Marion Smith | 26 | Wife | — | Iowa |
| 2 | Bradley Smith | 0 | Son | — | Illinois |
| 3 | Arlington Sliffal | 26 | Head | Steel Worker | Illinois |
| 4 | Florence Sliffal | 23 | Wife | — | Illinois |
| 5 | John Ayres | 35 | Head | Bartender | Italy |
| 6 | Nancy Ayres | 30 | Wife | — | Chicago |
| 7 | Rose Ayres | 13 | Daughter | — | Illinois |
| 8 | Bernardine Ayres | 11 | Daughter | — | Illinois |
| 9 | Nancy Lee Ayres | 7 | Daughter | — | Illinois |
| 10 | Jordan T. Cook | 56 | Head | Plumber | Canada-Eng |
| 11 | Elizabeth G. Cook | 45 | Wife | — | Scotland |
| 12 | Thomas J. Cook | 17 | Son | — | Canada-Eng |
| 13 | Elizabeth J. Cook THIS PERSON | 16 | Daughter | — | Canada-Eng |
| 14 | Robert R. Cook | 14 | Son | — | Illinois |
| 15 | Gilbert M. Jones | 26 | Son-in-law | Proprietor Manager | Illinois |
| 16 | Christine I. Jones | 20 | Daughter | — | Canada-Eng |
| 17 | Ines Lee Jones | 2 | Daughter | — | Illinois |
| 18 | Elizabeth Lee Jones | 0 | Daughter | — | Illinois |
| 19 | Carrie S. Brown | 79 | Head | — | Illinois |
| 20 | Gertrude Miller | 49 | Daughter | Practical Nurse | Illinois |
| 21 | Leo Corner | 36 | Head | Weigher | Illinois |
| 22 | Erna Corner | 33 | Wife | — | Wisconsin |
| 23 | Jacqueline Corner | 8 | Daughter | — | Illinois |
| 24 | Delores Corner | 6 | Daughter | — | Illinois |
| 25 | Elizabeth Hubert | 60 | Head | — | Illinois |
| 26 | Zoehler Earl Hubert | 34 | Son | Attendant | Illinois |
| 27 | Nellie Newnham | 72 | Head | Housekeeper | New York |
| 28 | Mary Whitlock | 31 | Lodger | Teacher | Illinois |
| 29 | Lloyd Carpenter | 43 | Head | Painter | Illinois |
| 30 | Flora Carpenter | 38 | Wife | — | Iowa |
| 31 | Carmen Carpenter | 16 | Daughter | — | Iowa |
| 32 | Alida Overleecken | 65 | Head | — | Illinois |
| 33 | Suzanne Bovet | 25 | Niece | Stenographer | Illinois |
| 34 | Tarciel Goodbout | 83 | Head | — | Canada-Fr |
| 35 | Albert Goodbout | 54 | Son | Fence Erector | Illinois |
| 36 | Florence Goodbout | 44 | Daughter-in-law | — | Kansas |
| 37 | Loren T. Simmons | 49 | Head | Fence Erector | Illinois |
| 38 | Celia Simmons | 48 | Wife | — | Illinois |
| 39 | Loren A. Simmons | 15 | Son | — | Illinois |
| 40 | Virginia Simmons | 13 | Daughter | — | Illinois |
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)