RC
Robert Cook — 1940 US Census Record
Model Tree available1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this Robert Cook across the 1920, 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents William & Sr — first a son (b.~1917), then head of a 4-person household.
Age 23
b. ~1917
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | Cook |
| Given Name | Robert F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Brookline |
| 1935 Residence (County) | Delaware |
| Additional Details | |
| Occupation | Driver |
| Industry | Retail Coal-Oil |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1200 |
| Highest Grade | C 2 |
| 1935 Residence | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Driver |
| Township / Ward | Manoa |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Sr Cook | Head | — | 67 | ~1873 |
| Robert Cook | Son | — | 23 | ~1917 |
| Jr Cook | Son | — | 25 | ~1915 |
| Helen Cook | Spouse | — | 46 | ~1894 |
Census Appearances
1920
Delaware, Pennsylvania
Son, age 2
Delaware, Pennsylvania · implied b. ~1918 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Robert B. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Delaware, Pennsylvania
Son, age 13
Delaware, Pennsylvania · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Robert G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Delaware-County, Pennsylvania
Son, age 23
Delaware-County, Pennsylvania · implied b. ~1917 — 4 household members
| Surname | Cook |
| Given Name | Robert F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Brookline |
| 1935 Residence (County) | Delaware |
| Occupation | Driver |
| Industry | Retail Coal-Oil |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1200 |
| Highest Grade | C 2 |
| 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 Robert Cook across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Cook (~0.92 confidence) and father Sr Cook (~0.92 confidence) and father William Cook (~0.92 confidence) and mother Helen Cook (~0.92 confidence) and mother Helen Cook (~0.92 confidence) and mother Helen Cook (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Cook
b. ~1873
Source father
● Household
· direct · ~0.92
Father
Sr Cook
b. ~1873
Source father
● Household
· direct · ~0.92
Father
William Cook
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Helen Cook
b. ~1894
Source mother
● Household
· direct · ~0.92
Mother
Helen Cook
b. ~1894
Source mother
● Household
· direct · ~0.92
Mother
Helen Cook
b. ~1894
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Cook
Son · 1940 · age 23 · b. ~1917 · Pennsylvania
★ You are viewing this record
Sibling
Jr Cook
Sibling · 1940 · age 25
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 — Delaware-County, Pennsylvania
Open full size
1940 US Federal Census — Delaware-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03492-00640)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Edwin J. Schactle | 5 | Son | — | Pennsylvania |
| 42 | Sr. William Cook | 67 | Head | Journalist | Ohio |
| 43 | Helen (X) Cook | 46 | Wife | — | Pennsylvania |
| 44 | Jr. William Cook | 25 | Son | Inspector | Pennsylvania |
| 45 | Robert F. Cook THIS PERSON | 23 | Son | Driver | Pennsylvania |
| 46 | Charles (X) Mccarty | 70 | Head | School | Pennsylvania |
| 47 | Francis Mccarty | 63 | Wife | — | Pennsylvania |
| 48 | Mary Barger | 74 | Sister | — | Pennsylvania |
| 49 | John Alexander | 42 | Head | Foreman | Scotland |
| 50 | Isabella (X) Alexander | 42 | Wife | — | Scotland |
| 51 | James Alexander | 7 | Son | — | Massachusetts |
| 52 | William Taitt | 35 | Head | Salesman | Pennsylvania |
| 53 | Frances (X) Taitt | 32 | Wife | — | Pennsylvania |
| 54 | Ruth Taitt | 11 | Daughter | — | Pennsylvania |
| 55 | William Ferrell | 35 | Head | Construction Engineer | New Jersey |
| 56 | Norma (X) Ferrell | 33 | Wife | — | Wyoming |
| 57 | Richard Ferrell | 3 | Son | — | Pennsylvania |
| 58 | Wilfred Getty | 41 | Head | Automobile Mechanic | Pennsylvania |
| 59 | Myrtle (X) Getty | 36 | Wife | — | Pennsylvania |
| 60 | Wilfred Getty | 13 | Son | — | Pennsylvania |
| 61 | Edgar Getty | 11 | Son | — | Pennsylvania |
| 62 | Dorothy Getty | 10 | Daughter | — | Pennsylvania |
| 63 | Paul Getty | 7 | Son | — | Pennsylvania |
| 64 | George Rudolph | 39 | Head | Draftsman | Germany |
| 65 | Marda (X) Rudolph | 39 | Wife | — | Germany |
| 66 | Bruno Rudolph | 13 | Son | — | Pennsylvania |
| 67 | Herbert Rudolph | 10 | Son | — | Pennsylvania |
| 68 | George Bowie | 53 | Head | Traveling Salesman | Maine |
| 69 | Cottilda (X) Bowie | 50 | Wife | — | New York |
| 70 | George R. Bowie | 15 | Son | — | New York |
| 71 | Marjorie Bowie | 11 | Daughter | — | New York |
| 72 | Manchester Bowie | 11 | Son | — | New York |
| 73 | Clifford Wagner | 34 | Head | Accountant | Pennsylvania |
| 74 | Mabel (X) Wagner | 31 | Wife | — | Pennsylvania |
| 75 | Joan Wagner | 9 | Daughter | — | Pennsylvania |
| 76 | Bruce Myers | 41 | Head | Mechanic | Pennsylvania |
| 77 | Mildred (X) Myers | 37 | Wife | — | Pennsylvania |
| 78 | Velma Myers | 22 | Neice | Hair Dresser | Pennsylvania |
| 79 | Nelson Magesch | 34 | Head | Electrical Engineer | Pennsylvania |
| 80 | Anne (X) Magesch | 24 | Wife | — | Pennsylvania |
Pedigree Summary
Robert + 1 sibling
Gen 1 · 6 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)