JC
John Cook — 1940 US Census Record
Model Tree available1940 United States Federal Census · King-County, Washington
Our Model Tree links this John Cook across the 1920, 1930 and 1940 US Censuses in King-County, Washington (XGBoost, ~Confirmed), with identified parents Frank & Karl — first a head (b.~1908), then head of a 3-person household.
Age 32
b. ~1908
Male
Head
Born: Washington
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | King-County, Washington |
| Surname | Cook |
| Given Name | John W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Washington |
| 1935 Residence (City) | North Trunk P. |
| 1935 Residence (County) | King |
| Additional Details | |
| Occupation | Shop Supervisor |
| Industry | International Harvester |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2400 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| Occupation | Shop Supervisor |
| Township / Ward | North Trunk P |
| Est. Birth Year | ~1908 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Charlene Cook | Daughter | — | 1 | ~1939 |
| John Cook | Head | — | 32 | ~1908 |
| Margaret Cook | Spouse | — | 27 | ~1913 |
Census Appearances
1920
King, Washington
Son, age 12
King, Washington · implied b. ~1908 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | Minnesota |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1930
King, Washington
Son, age 22
King, Washington · implied b. ~1908 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | Minnesota |
| Occupation | Mechanic |
| Industry | Automobile |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1940
King-County, Washington
Head, age 32
King-County, Washington · implied b. ~1908 — 3 household members
| Surname | Cook |
| Given Name | John W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Washington |
| 1935 Residence (City) | North Trunk P. |
| 1935 Residence (County) | King |
| Occupation | Shop Supervisor |
| Industry | International Harvester |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2400 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
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 John Cook across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Frank Cook (~0.92 confidence) and father Karl Cook (~0.92 confidence) and mother Theresa Cook (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Cook
b. ~1885
Source father
● Household
· direct · ~0.92
Father
Karl Cook
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Theresa Cook
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Cook
Head · 1940 · age 32 · b. ~1908 · Washington
★ 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 — King-County, Washington
Open full size
1940 US Federal Census — King-County, Washington
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04345-00775)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Bertha Rogers | 32 | Wife | — | Michigan |
| 2 | Joanne Rogers | 7 | Daughter | — | Washington |
| 3 | James Rogers | 5 | Son | — | Washington |
| 4 | Cecil R. Scoones | 53 | Head | — | Canada |
| 5 | Grace M. Scoones | 52 | Wife | — | New York |
| 6 | Ow Trunell | 35 | Head | Salesman | South Dakota |
| 7 | Edith Trunell | 31 | Wife | Office | Washington |
| 8 | Jane Trunell | 8 | Daughter | — | Washington |
| 9 | Pauline Durr | 67 | Servant | Servant | Norway |
| 10 | Wallace E. Smith | 38 | Head | Sales Supervisor | Washington |
| 11 | Mable May Smith | 38 | Wife | Dental Assistant | Alberta |
| 12 | Wallace Jr. Smith | 6 | Son | — | Washington |
| 13 | Frank Crowthers | 38 | Head | Sheet Metal | England |
| 14 | Helen Crowthers | 38 | Wife | — | Massachusetts |
| 15 | Lee Crowthers | 5 | Son | — | Washington |
| 16 | Ada Aldrich | 58 | Mother in law | Housekeeper | Canada |
| 17 | Rosa M. Robertson | 62 | Head | — | Nebraska |
| 18 | Ralph D. Higgins | 55 | Brother | Insurance Salesman | Nebraska |
| 19 | Gus Bolz | 51 | Head | Manager | Iowa |
| 20 | Grace Bolz | 45 | Wife | — | Iowa |
| 21 | Robert Bolz | 23 | Son | Mechanic Automobile | Iowa |
| 22 | Lois Bolz | 21 | Daughter | Cashier | Iowa |
| 23 | John W. Cook THIS PERSON | 32 | Head | Shop Supervisor | Washington |
| 24 | Margaret Cook | 27 | Wife | — | Washington |
| 25 | Charlene Cook | 1 | Daughter | — | Washington |
| 26 | Kendall Stanwick | 41 | Head | Salesman | South Dakota |
| 27 | Joy Stanwick | 37 | Wife | — | Arkansas |
| 28 | Kendall Jr. Stanwick | 13 | Son | — | Washington |
| 29 | Cherry Stanwick | 9 | Daughter | — | Washington |
| 30 | John Stanwick | 2 | Son | — | Washington |
| 31 | Everett P. Blakley | 46 | Head | Porter | Oklahoma |
| 32 | Gwendoline Blakley | 46 | Wife | — | California |
| 33 | Everett Blakley | 20 | Son | — | Illinois |
| 34 | Robert Blakley | 19 | Son | — | Illinois |
| 35 | Jane Blyth | 28 | Head | Secretary | Washington |
| 36 | Linnie Blyth | 57 | Mother | Maid | Wales |
| 37 | Emil Keebler | 57 | Head | Cook | Germany |
| 38 | Birdie Keebler | 56 | Wife | — | Utah |
| 39 | L. G. Coonrod | 63 | Lodger | Passenger Agent | Kansas |
| 40 | Lloyd C. Hartwig | 37 | Head | Manager Contract | Washington |
Pedigree Summary
John
Gen 1 · 3 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)