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John Blake — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this John Blake across the 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1895), then head of a 9-person household.
Age 45
b. ~1895
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | Blake |
| Given Name | John P. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Glenolden borough |
| 1935 Residence (County) | Delaware |
| Additional Details | |
| Occupation | Bank Clerk |
| Industry | Banking |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 266 |
| Highest Grade | C-2 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Bank Clerk |
| Township / Ward | Glenolden Borough |
| Est. Birth Year | ~1895 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Catherine Blake | Daughter | — | 13 | ~1927 |
| Mary Blake | Daughter | — | 10 | ~1930 |
| Margaret Blake | Daughter | — | 17 | ~1923 |
| John Blake | Son | — | 8 | ~1932 |
| Catherine Blake | Spouse | — | 42 | ~1898 |
| Joseph Blake | Son | — | 18 | ~1922 |
| John Blake | Head | — | 45 | ~1895 |
| Richard Blake | Son | — | ~1940 | |
| James Blake | Son | — | 4 | ~1936 |
Census Appearances
1930
Delaware, Pennsylvania
Head, age 36
Delaware, Pennsylvania · implied b. ~1894 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blake |
| Given Name | John P. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 26 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Manager |
| Industry | Mortuary Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 15000 |
| Radio Set | R |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Delaware-County, Pennsylvania
Head, age 45
Delaware-County, Pennsylvania · implied b. ~1895 — 9 household members
| Surname | Blake |
| Given Name | John P. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Glenolden borough |
| 1935 Residence (County) | Delaware |
| Occupation | Bank Clerk |
| Industry | Banking |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 266 |
| Highest Grade | C-2 |
| 1935 Residence | Same place |
| 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 John Blake across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Blake
Head · 1940 · age 45 · b. ~1895 · Pennsylvania
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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-t0627-03491-00387)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Abraham Petraski | 55 | Head | Retail Grocer | Russia |
| 2 | Mary Petraski | 50 | Wife | — | Russia |
| 3 | Minnie Petraski | 22 | Daughter | — | Pennsylvania |
| 4 | Egbert A. Keenan | 47 | Head | — | Pennsylvania |
| 5 | Marion Keenan | 45 | Wife | Telephone Operator | Pennsylvania |
| 6 | Bernice Keenan | 17 | Daughter | — | Pennsylvania |
| 7 | Eileen Keenan | 13 | Daughter | — | Pennsylvania |
| 8 | Roberta Keenan | 10 | Daughter | — | Pennsylvania |
| 9 | Joan Keenan | 5 | Daughter | — | Pennsylvania |
| 10 | Oscar B. Nilson | 42 | Head | Carpenter | Sweden |
| 11 | Alice D. Nilson | 12 | Daughter | — | Pennsylvania |
| 12 | Charles Werkheiser | 40 | Head | School Teacher | Pennsylvania |
| 13 | Emily B. Werkheiser | 34 | Wife | — | Pennsylvania |
| 14 | Linford Werkheiser | 7 | Son | — | Pennsylvania |
| 15 | Helen Werkheiser | 5 | Daughter | — | Pennsylvania |
| 16 | Harry Chuzum | 47 | Head | Carpenter | Maryland |
| 17 | Bessie B. Chuzum | 47 | Wife | — | Maryland |
| 18 | James A. Chuzum | 21 | Son | Tagger | Maryland |
| 19 | John P. Blake THIS PERSON | 45 | Head | Bank Clerk | Pennsylvania |
| 20 | Catherine C. Blake | 42 | Wife | — | Pennsylvania |
| 21 | Joseph J. Blake | 18 | Son | — | Pennsylvania |
| 22 | Margaret M. Blake | 17 | Daughter | — | Pennsylvania |
| 23 | Catherine M. Blake | 13 | Daughter | — | Pennsylvania |
| 24 | Mary G. E. Blake | 10 | Daughter | — | Pennsylvania |
| 25 | John Paul Blake | 8 | Son | — | Pennsylvania |
| 26 | James S. Blake | 4 | Son | — | Pennsylvania |
| 27 | Richard J. Blake | 0 | Son | — | Pennsylvania |
| 28 | Pierce Bowen | 42 | Head | Machinist | Pennsylvania |
| 29 | Eloise Bowen | 40 | Wife | — | Maryland |
| 30 | Edward J. Bowen | 17 | Son | — | Pennsylvania |
| 31 | Mildred Bowen | 3 | Daughter | — | Pennsylvania |
| 32 | James A. Martin | 48 | Head | Draftsman | Pennsylvania |
| 33 | Marguerite Martin | 45 | Wife | — | Pennsylvania |
| 34 | John Martin | 17 | Son | — | Pennsylvania |
| 35 | James Jr. Martin | 9 | Son | — | Pennsylvania |
| 36 | Frederick Walters | 74 | Head | Storekeeper | New York |
| 37 | Emma B. Walters | 70 | Wife | — | New York |
| 38 | Leonard M. Walters | 49 | Son | Sheet Metal Worker | New York |
| 39 | Sylvia F. Walters | 33 | Daughter | Clerk | New York |
| 40 | Charles P. Ward | 42 | Head | Dental Technician | Maryland |
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)