HC
Harry Cook — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Plymouth-County, Massachusetts
Our Model Tree links this Harry Cook across the 1930 and 1940 US Censuses in Plymouth-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1920), then head of a 10-person household.
Age 20
b. ~1920
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Plymouth-County, Massachusetts |
| Surname | Cook |
| Given Name | Harry S. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Brockton City |
| 1935 Residence (County) | Plymouth |
| Additional Details | |
| Occupation | Carpenter |
| Industry | contracting company |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 450 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Carpenter |
| Township / Ward | Brockton City |
| Est. Birth Year | ~1920 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Harry | Age | Birth yr |
|---|---|---|---|---|
| Ruth Cook | Daughter | — | 25 | ~1915 |
| Robert Cook | Son | — | 23 | ~1917 |
| Claire Cook | Daughter | — | 26 | ~1914 |
| Elizabeth Cook | Daughter | — | 18 | ~1922 |
| John Cook | Son | — | 14 | ~1926 |
| Daisy Cook | Spouse | — | 48 | ~1892 |
| Harry Cook | Son | — | 20 | ~1920 |
| David Cook | Son | — | 10 | ~1930 |
| Le Cook | Head | — | 50 | ~1890 |
| Ruth Bonney | Other | — | 21 | ~1919 |
Census Appearances
1930
Plymouth, Massachusetts
Son, age 10
Plymouth, Massachusetts · implied b. ~1920 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Harry |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Plymouth-County, Massachusetts
Son, age 20
Plymouth-County, Massachusetts · implied b. ~1920 — 10 household members
| Surname | Cook |
| Given Name | Harry S. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Brockton City |
| 1935 Residence (County) | Plymouth |
| Occupation | Carpenter |
| Industry | contracting company |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 450 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Harry Cook across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Harry Cook
Son · 1940 · age 20 · b. ~1920 · Massachusetts
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Sibling
John Cook
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Cook
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
David Cook
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Cook
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Cook
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Claire Cook
Sibling · 1940 · age 26
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 — Plymouth-County, Massachusetts
Open full size
1940 US Federal Census — Plymouth-County, Massachusetts
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01637-00241)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Norma Fortin | 8 | daughter | — | Massachusetts |
| 42 | Edna D. De Pasqua | 38 | Head | — | Massachusetts |
| 43 | Shirley De Pasqua | 13 | daughter | — | Massachusetts |
| 44 | Barbara De Pasqua | 11 | daughter | — | Massachusetts |
| 45 | Louise Valentine | 66 | Head | — | Massachusetts |
| 46 | Mildred Valentine | 42 | daughter | Sewer | Massachusetts |
| 47 | Margaret Valentine | 18 | daughter | — | Massachusetts |
| 48 | Louise Mack | 17 | daughter | — | Massachusetts |
| 49 | John E. O'Keefe | 67 | Head | — | New York |
| 50 | Lilly O'Keefe | 61 | wife | — | England |
| 51 | Ethel O'Keefe | 31 | daughter | Cutting Room | Massachusetts |
| 52 | Elizabeth O'Keefe | 27 | daughter | Clerk | Massachusetts |
| 53 | Elsie O'Keefe | 22 | daughter | Clerk | Massachusetts |
| 54 | Joseph O'Keefe | 37 | son | Lumper | Massachusetts |
| 55 | Luella Tasho | 24 | daughter | Office | Massachusetts |
| 56 | Richard L. Tasho | 5 | grandson | — | Massachusetts |
| 57 | Le Roy Cook | 50 | Head | Yard Man | Massachusetts |
| 58 | Daisy D. Cook | 48 | wife | — | Massachusetts |
| 59 | Claire A. Cook | 26 | daughter | Teacher | Massachusetts |
| 60 | Ruth E. Cook | 25 | daughter | Commercial Artist | Massachusetts |
| 61 | Robert L. Cook | 23 | son | Cabinet Maker | Massachusetts |
| 62 | Harry S. Cook THIS PERSON | 20 | son | Carpenter | Massachusetts |
| 63 | Elizabeth Cook | 18 | daughter | Stenographer | Massachusetts |
| 64 | John L. Cook | 14 | son | — | Massachusetts |
| 65 | David K. Cook | 10 | son | — | Massachusetts |
| 66 | Ruth Bonney | 21 | border | Helper | Massachusetts |
| 67 | Elphege St. Jacques | 40 | head | Laborer | Massachusetts |
| 68 | Sara L. St. Jacques | 36 | wife | — | Massachusetts |
| 69 | Phyllis St. Jacques | 14 | daughter | — | Massachusetts |
| 70 | Richard St. Jacques | 12 | son | — | Massachusetts |
| 71 | Jean St. Jacques | 9 | daughter | — | Massachusetts |
| 72 | Ernest St. Jacques | 8 | son | — | Massachusetts |
| 73 | Priscilla St. Jacques | 7 | daughter | — | Massachusetts |
| 74 | John St. Jacques | 4 | son | — | Massachusetts |
| 75 | Henry Poirirer | 29 | Head | Match Maker | Massachusetts |
| 76 | Dagmar Poirirer | 32 | wife | — | Finland |
| 77 | Peter Poirirer | 2 | son | — | Massachusetts |
| 78 | Albert Gilbert | 24 | border | Pattern Maker | Massachusetts |
| 79 | Beatrice Gilbert | 22 | border's wife | — | Massachusetts |
Related Census Records
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)