WC
William Cook — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jefferson-County, Kentucky
Our Model Tree links this William Cook across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Kentucky (XGBoost, ~Confirmed), with identified parents Andrew & Andrew — first a head (b.~1915), then head of a 3-person household.
Age 25
b. ~1915
Male
Head
Born: Kentucky
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kentucky |
| Surname | Cook |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville city |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Occupation | Mail Carrier |
| Industry | Post Office |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | C 2 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Mail Carrier |
| Township / Ward | Louisville City |
| Est. Birth Year | ~1915 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Donna Cook | Daughter | — | 2 | ~1938 |
| William Cook | Head | — | 25 | ~1915 |
| Isabella Cook | Spouse | — | 24 | ~1916 |
Census Appearances
1920
Jefferson, Kentucky
Son, age 5
Jefferson, Kentucky · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Jefferson, Kentucky
Son, age 15
Jefferson, Kentucky · implied b. ~1915 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | William E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Jefferson-County, Kentucky
Head, age 25
Jefferson-County, Kentucky · implied b. ~1915 — 3 household members
| Surname | Cook |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville city |
| 1935 Residence (County) | Jefferson |
| Occupation | Mail Carrier |
| Industry | Post Office |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | C 2 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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 Cook across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Andrew Cook (~0.92 confidence) and father Andrew Cook (~0.92 confidence) and mother L Cook (~0.92 confidence) and mother Anna Cook (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Andrew Cook
b. ~1889
Source father
● Household
· direct · ~0.92
Father
Andrew Cook
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
L Cook
b. ~1894
Source mother
● Household
· direct · ~0.92
Mother
Anna Cook
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Cook
Head · 1940 · age 25 · b. ~1915 · Kentucky
★ 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 — Jefferson-County, Kentucky
Open full size
1940 US Federal Census — Jefferson-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01374-00678)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Minnie Sachsated | 63 | Wife | — | Kentucky |
| 2 | William Lippy | 40 | Son-in-law | Sign Writer | Kentucky |
| 3 | Catherine Lippy | 36 | Daughter | — | Kentucky |
| 4 | William Hiller | 67 | Boarder | — | Kentucky |
| 5 | John F. Koch | 50 | Head | Claim Clerk | Kentucky |
| 6 | Bertha Koch | 49 | Wife | — | Kentucky |
| 7 | Lydia Huber | 61 | Head | — | Kentucky |
| 8 | Irvin L. Huber | 30 | Son | Electrical Engineer | Kentucky |
| 9 | Alfred Fassenmeier | 29 | Head | Storekeeper | Kentucky |
| 10 | Clara Fassenmeier | 28 | Wife | Bookkeeper | Kentucky |
| 11 | Clara H. Stiebling | 54 | Head | — | Illinois |
| 12 | Evelyn M. Stiebling | 25 | Daughter | Bookkeeper | Kentucky |
| 13 | William Cook THIS PERSON | 25 | Head | Mail Carrier | Kentucky |
| 14 | Isabella Cook | 24 | Wife | — | Kentucky |
| 15 | Donna Marie Cook | 2 | Daughter | — | Kentucky |
| 16 | J. S. Nyekely | 32 | Head | Mechanic | Kentucky |
| 17 | Lettie Nyekely | 33 | Wife | — | Tennessee |
| 18 | Harold F. Nyekely | 3 | Son | — | Kentucky |
| 19 | James C. Chambers | 59 | Head | Machinist | Kentucky |
| 20 | Ida Chambers | 56 | Wife | Practical Nurse | Kentucky |
| 21 | Cora Chambers | 12 | Daughter | — | Kentucky |
| 22 | Haden D. Patmon | 58 | Head | — | Kentucky |
| 23 | Alice Patmon | 55 | Wife | — | California |
| 24 | Gertrude Patmon | 33 | Daughter | Typist | Kentucky |
| 25 | Archer Patmon | 29 | Son | Cabinet Maker | Kentucky |
| 26 | Marie Patmon | 25 | Daughter | — | Kentucky |
| 27 | Thomas Patmon | 2 | Grandson | — | Kentucky |
| 28 | Johanna Hasler | 58 | Head | — | Germany |
| 29 | William S. Hasler | 31 | Son | Draftsman | Kentucky |
| 30 | Clinton Carter | 59 | Head | Freight Foreman | Kentucky |
| 31 | Lula Carter | 59 | Wife | — | Kentucky |
| 32 | O. C. Halford | 42 | Head | Repairer | Tennessee |
| 33 | Mary Halford | 40 | Wife | — | Tennessee |
| 34 | O. C. Jr. Halford | 16 | Son | — | Kentucky |
| 35 | Rejean Halford | 10 | Daughter | — | Kentucky |
| 36 | Stanley Muessle | 24 | Head | Warehouseman | Kentucky |
| 37 | Constance Muessle | 20 | Wife | — | Kentucky |
| 38 | Jacob S. Schindlers | 59 | Head | Packer | Kentucky |
| 39 | Rosa Schindlers | 59 | Wife | — | Kentucky |
| 40 | Viola M. Schindlers | 30 | Daughter | Stenographer | Kentucky |
Pedigree Summary
William
Gen 1 · 4 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)