LC
Lillian Cook — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Lillian Cook across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1918), then head of a 9-person household.
Age 22
b. ~1918
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Cook |
| Given Name | Lillian |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Venetia |
| 1935 Residence (County) | Washington |
| Additional Details | |
| Occupation | maid |
| Industry | private home |
| Class of Worker | PW |
| Hours Worked | 61 |
| Income (1939) | 360 |
| Highest Grade | H 4 |
| 1935 Residence | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Maid |
| Township / Ward | Baldwin |
| Est. Birth Year | ~1918 |
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 Lillian | Age | Birth yr |
|---|---|---|---|---|
| George Cook | Son | — | 20 | ~1920 |
| Mildred Cook | Daughter | — | 9 | ~1931 |
| Lillian Cook | Daughter | — | 22 | ~1918 |
| Hazel Cook | Head | — | 44 | ~1896 |
| Henry Cook | Son | — | 19 | ~1921 |
| Malcolm Cook | Son | — | 5 | ~1935 |
| Shirley Cook | Daughter | — | 12 | ~1928 |
| Elizabeth Cook | Daughter | — | 15 | ~1925 |
| Charles Cook | Son | — | 12 | ~1928 |
Census Appearances
1930
Allegheny, Pennsylvania
Daughter, age 11
Allegheny, Pennsylvania · implied b. ~1919 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Lillian M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 22
Allegheny-County, Pennsylvania · implied b. ~1918 — 9 household members
| Surname | Cook |
| Given Name | Lillian |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Venetia |
| 1935 Residence (County) | Washington |
| Occupation | maid |
| Industry | private home |
| Class of Worker | PW |
| Hours Worked | 61 |
| Income (1939) | 360 |
| Highest Grade | H 4 |
| 1935 Residence | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Lillian Cook
Daughter · 1940 · age 22 · b. ~1918 · Pennsylvania
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Sibling
Elizabeth Cook
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Shirley Cook
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Henry Cook
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Malcolm Cook
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mildred Cook
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Cook
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Cook
Sibling · 1940 · age 12
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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03397-00497)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Emil Geyer | 14 | Son | — | Pennsylvania |
| 42 | Miriam Geyer | 12 | Daughter | — | Pennsylvania |
| 43 | Albert Geyer | 11 | Son | — | Pennsylvania |
| 44 | James Reagher | 56 | Head | Asst Foreman | Pennsylvania |
| 45 | Bertha Reagher | 56 | Wife | — | Pennsylvania |
| 46 | Beryl Reagher | 27 | Daughter | — | Pennsylvania |
| 47 | Archie Reagher | 24 | Son | Platform Laborer | Pennsylvania |
| 48 | Jean Reagher | 24 | Daughter | — | Pennsylvania |
| 49 | Powell Reagher | 4 | Son | — | Pennsylvania |
| 50 | Hazel Cook | 44 | Head | — | Pennsylvania |
| 51 | Lillian Cook THIS PERSON | 22 | Daughter | Maid | Pennsylvania |
| 52 | George Cook | 20 | Son | Elevator Operator | Pennsylvania |
| 53 | Henry Cook | 19 | Son | Core Boy | Pennsylvania |
| 54 | Elizabeth Cook | 15 | Daughter | — | Pennsylvania |
| 55 | Shirley Cook | 12 | Daughter | — | Pennsylvania |
| 56 | Mildred Cook | 9 | Daughter | — | Pennsylvania |
| 57 | Malcolm Cook | 5 | Son | — | Pennsylvania |
| 58 | Charles Cook | 12 | Son | — | Pennsylvania |
| 59 | Albert Redding | 30 | Head | Foreman | Pennsylvania |
| 60 | Rachel Redding | 29 | Wife | — | Pennsylvania |
| 61 | Joseph Redding | 5 | Son | — | Pennsylvania |
| 62 | Albert Redding | 1 | Son | — | Pennsylvania |
| 63 | Herbert Davis | 34 | Head | Clerk | Pennsylvania |
| 64 | Thelma Davis | 32 | Wife | — | Pennsylvania |
| 65 | Bernard Pritsch | 36 | Head | Medical Doctor | Germany |
| 66 | Gladys Pritsch | 31 | Wife | — | Pennsylvania |
| 67 | August Pritsch | 64 | Father | — | Germany |
| 68 | Joseph White | 35 | Head | Accountant | Pennsylvania |
| 69 | Esther White | 32 | Wife | — | Pennsylvania |
| 70 | Jo Anne White | 3 | Daughter | — | Pennsylvania |
| 71 | Maude White | 66 | Mother-in-law | — | Pennsylvania |
| 72 | White | None | — | — | — |
| 73 | Carl Larsen | 36 | Head | Salesman | Norway |
| 74 | Hannah Larsen | 32 | Wife | — | Ohio |
| 75 | Gudrun Abramsen | 34 | Sister-in-law | — | Norway |
| 76 | Finn Abramsen | 30 | Brother-in-law | Mechanical Engineer | Ohio |
| 77 | Robert Hagaman | 39 | Head | Superintendent | Pennsylvania |
| 78 | Margaret Hagaman | 36 | Wife | — | Pennsylvania |
| 79 | Robert Hagaman | 18 | Son | — | Pennsylvania |
| 80 | Phyllis Hagaman | 11 | Daughter | — | Pennsylvania |
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)