DC
David Cook — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lawrence-County, Pennsylvania
Our Model Tree links this David Cook across the 1930 and 1940 US Censuses in Lawrence-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1927), then head of a 7-person household.
Age 13
b. ~1927
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lawrence-County, Pennsylvania |
| Surname | Cook |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Beaver |
| Additional Details | |
| Highest Grade | 7 |
| 1935 Residence | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Wurtemburg |
| Est. Birth Year | ~1927 |
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 David | Age | Birth yr |
|---|---|---|---|---|
| Richard Cook | Son | — | 9 | ~1931 |
| Ann Cook | Daughter | — | 7 | ~1933 |
| Harry Cook | Head | — | 46 | ~1894 |
| David Cook | Son | — | 13 | ~1927 |
| Florence Cook | Daughter | — | 17 | ~1923 |
| Mary Cook | Spouse | — | 40 | ~1900 |
| Jane Cook | Daughter | — | 12 | ~1928 |
Census Appearances
1930
Beaver, Pennsylvania
Son, age 3
Beaver, Pennsylvania · implied b. ~1927 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Daniel |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Lawrence-County, Pennsylvania
Son, age 13
Lawrence-County, Pennsylvania · implied b. ~1927 — 7 household members
| Surname | Cook |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Beaver |
| Highest Grade | 7 |
| 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 David Cook across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
David Cook
Son · 1940 · age 13 · b. ~1927 · Pennsylvania
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Sibling
Florence Cook
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jane Cook
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ann Cook
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Cook
Sibling · 1940 · age 9
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 — Lawrence-County, Pennsylvania
Open full size
1940 US Federal Census — Lawrence-County, Pennsylvania
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-03539-00104)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William Timblin | 67 | Head | — | Pennsylvania |
| 42 | Pearl Timblin | 62 | Wife | — | Pennsylvania |
| 43 | Hughlen Timblin | 23 | Son | Mail Carrier | Pennsylvania |
| 44 | Richard Timblin | 21 | Son | Laborer | Pennsylvania |
| 45 | Ray N. Ketterer | 32 | Head | Inspector | Pennsylvania |
| 46 | Martha Ketterer | 33 | Wife | — | Pennsylvania |
| 47 | Harry R. Ketterer | 4 | Son | — | Pennsylvania |
| 48 | Jacqulyn Ketterer | 3 | Daughter | — | Pennsylvania |
| 49 | Ludil Roeloff | 24 | Head | — | Pennsylvania |
| 50 | Paul Roeloff | 24 | Son | Tally Clerk | Pennsylvania |
| 51 | Harry J. Cook | 46 | Head | Timekeeper | Pennsylvania |
| 52 | Mary J. Cook | 40 | Wife | — | Pennsylvania |
| 53 | Florence Cook | 17 | Daughter | — | Pennsylvania |
| 54 | David Cook THIS PERSON | 13 | Son | — | Pennsylvania |
| 55 | Jane Cook | 12 | Daughter | — | Pennsylvania |
| 56 | Richard Cook | 9 | Son | — | Pennsylvania |
| 57 | Ann Cook | 7 | Daughter | — | Pennsylvania |
| 58 | William Hayes | 27 | Head | Storekeeper | Pennsylvania |
| 59 | Letha B. Hayes | 26 | Wife | — | Pennsylvania |
| 60 | Jo Ann Hayes | 3 | Daughter | — | Pennsylvania |
| 61 | Walter Tyndall | 36 | Head | Sweeper | Pennsylvania |
| 62 | Cora Tyndall | 28 | Wife | — | Pennsylvania |
| 63 | Margaret Tyndall | 7 | Daughter | — | Pennsylvania |
| 64 | Walter Tyndall | 3 | Son | — | Pennsylvania |
| 65 | Earl A. Tyndall | 1 | Son | — | Pennsylvania |
| 66 | Harry Kiesling | 45 | Head | Machinist | Pennsylvania |
| 67 | Alice Kiesling | 44 | Wife | — | Pennsylvania |
| 68 | George Kiesling | 21 | Son | Clerk | Pennsylvania |
| 69 | Ruth Kiesling | 17 | Daughter | — | Pennsylvania |
| 70 | Edward Workley | 70 | Head | — | Pennsylvania |
| 71 | Mary Workley | 65 | Wife | — | Pennsylvania |
| 72 | Harry Wimer | 41 | Head | Laborer | Pennsylvania |
| 73 | Gladys Wimer | 38 | Wife | — | Pennsylvania |
| 74 | Burnetta Wimer | 20 | Daughter | Bookkeeper | Pennsylvania |
| 75 | Frances Wimer | 18 | Daughter | Bookkeeper | Pennsylvania |
| 76 | Bill Wimer | 19 | Son | — | Pennsylvania |
| 77 | Eugene Wimer | 2 | Son | — | 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)