LC
Lillian Cook — 1940 US Census Record
Model Tree available1940 United States Federal Census · King-County, Washington
Our Model Tree links this Lillian Cook across the 1920, 1930 and 1940 US Censuses in King-County, Washington (XGBoost, ~Confirmed), with identified parents Edward & Edward — first a daughter (b.~1917), then head of a 7-person household.
Age 23
b. ~1917
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | King-County, Washington |
| Surname | Cook |
| Given Name | Lillian |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Seattle City |
| 1935 Residence (County) | King |
| Additional Details | |
| Occupation | New Worker |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | New Worker |
| Township / Ward | Seattle City |
| Est. Birth Year | ~1917 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Lillian | Age | Birth yr |
|---|---|---|---|---|
| Lillian Cook | Daughter | — | 23 | ~1917 |
| Viola Cook | Daughter | — | 21 | ~1919 |
| Gilbert Cook | Son | — | 13 | ~1927 |
| Edward Cook | Son | — | 17 | ~1923 |
| Edward Cook | Head | — | 56 | ~1884 |
| Raymond Cook | Son | — | 2 | ~1938 |
| Elizabeth Cook | Spouse | — | 45 | ~1895 |
Census Appearances
1920
King, Washington
Daughter, age 3
King, Washington · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Lillian E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Germany |
| Mother Tongue | German |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
King, Washington
Daughter, age 13
King, Washington · implied b. ~1917 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Lillian |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Germany |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
King-County, Washington
Daughter, age 23
King-County, Washington · implied b. ~1917 — 7 household members
| Surname | Cook |
| Given Name | Lillian |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Seattle City |
| 1935 Residence (County) | King |
| Occupation | New Worker |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Lillian Cook across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Edward Cook (~0.92 confidence) and father Edward Cook (~0.92 confidence) and father Edward Cook (~0.92 confidence) and mother Elizabeth Cook (~0.92 confidence) and mother Elizabeth Cook (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Edward Cook
b. ~1884
Source father
● Household
· direct · ~0.92
Father
Edward Cook
b. ~1884
Source father
● Household
· direct · ~0.92
Father
Edward Cook
b. ~1893
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Cook
b. ~1896
Source mother
● Household
· direct · ~0.92
Mother
Elizabeth Cook
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Lillian Cook
Daughter · 1940 · age 23 · b. ~1917 · Washington
★ You are viewing this record
Sibling
Edward Cook
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Cook
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gilbert Cook
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Viola Cook
Sibling · 1940 · age 21
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 — King-County, Washington
Open full size
1940 US Federal Census — King-County, Washington
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-04374-00359)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Edward Stokes | 38 | Son | Laborer | Montana |
| 42 | William Cromer | 57 | Head | Carpenter | Nebraska |
| 43 | Mabel Cromer | 53 | Wife | — | Missouri |
| 44 | Samuel Eaton | 62 | Head | Laborer | Missouri |
| 45 | Grace Eaton | 61 | Wife | — | Nebraska |
| 46 | Edward Eaton | 23 | Son | Deck Hand | Idaho |
| 47 | Ida Knutson | 53 | Head | — | Minnesota |
| 48 | Melvin Langdalen | 66 | Head | Watchman | Minnesota |
| 49 | Carrie Langdalen | 65 | Wife | — | Norway |
| 50 | Hazel Langdalen | 26 | Daughter | Housework | Washington |
| 51 | Edward Cook | 56 | Head | Truck Driver | Illinois |
| 52 | Elizabeth Cook | 45 | Wife | — | Germany |
| 53 | Lillian Cook THIS PERSON | 23 | Daughter | New Worker | Illinois |
| 54 | Viola Cook | 21 | Daughter | New Worker | Washington |
| 55 | Edward Jr Cook | 17 | Son | — | Washington |
| 56 | Gilbert Cook | 13 | Son | — | Washington |
| 57 | Raymond Cook | 2 | Son | — | Washington |
| 59 | James Taylor | 58 | Head | Truck Driver | Virginia |
| 60 | Martha Taylor | 56 | Wife | — | Alabama |
| 61 | Hilda Sandvig | 56 | Head | — | Norway |
| 62 | Marie Sandvig | 29 | Daughter | Nurse | Washington |
| 63 | Jerome Sandvig | 26 | Son | Pipe Fitter | Washington |
| 64 | John Sandvig | 17 | Son | — | Washington |
| 65 | Edwin Sandvig | 14 | Son | — | Washington |
| 66 | Inger Haugensteen | 32 | Daughter | — | Washington |
| 67 | Knute Haugensteen | 41 | Son-in-law | Superintendent | Norway |
| 68 | Kenneth Haugensteen | 10 | Grandson | — | Washington |
| 69 | Arlene Haugensteen | 9 | Granddaughter | — | Washington |
| 70 | Marion Cuccia | 32 | Head | Sausage Maker | Italy |
| 71 | Tila Cuccia | 31 | Wife | — | California |
| 72 | Frances Cuccia | 5 | Daughter | — | Washington |
| 73 | John Cuccia | 1 | Son | — | Washington |
| 74 | David D Menzon | 66 | Head | — | Kansas |
| 75 | Nora Menzon | 58 | Wife | — | Missouri |
| 76 | Norman Menzon | 20 | Son | Attendant | California |
| 77 | Earl S Menzon | 42 | Nephew | Laborer | Kansas |
| 78 | Samuel Coburn | 73 | Head | — | Kansas |
| 79 | Emma Coburn | 63 | Wife | — | Kansas |
| 80 | May Coburn | 32 | Daughter | Stenographer | Washington |
Pedigree Summary
Lillian + 4 siblings
Gen 1 · 5 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)