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John Blackwell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Schuylkill-County, Pennsylvania
Our Model Tree links this John Blackwell across the 1930 and 1940 US Censuses in Schuylkill-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 8-person household.
Age 19
b. ~1921
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Schuylkill-County, Pennsylvania |
| Surname | Blackwell |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Frackville borough |
| 1935 Residence (County) | Schuylkill |
| Additional Details | |
| Occupation | Laborer |
| Industry | Bridge Construction |
| Class of Worker | GW |
| Hours Worked | 7 |
| Income (1939) | 255 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Laborer |
| Township / Ward | Frackville Borough |
| Est. Birth Year | ~1921 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Joan Blackwell | Daughter | — | 5 | ~1935 |
| Francis Blackwell | Son | — | 11 | ~1929 |
| William Blackwell | Head | — | 42 | ~1898 |
| Katherine Blackwell | Spouse | — | 35 | ~1905 |
| John Blackwell | Son | — | 19 | ~1921 |
| Betty Blackwell | Daughter | — | 2 | ~1938 |
| Robert Blackwell | Son | — | 4 | ~1936 |
| William Blackwell | Son | — | 20 | ~1920 |
Census Appearances
1930
Schuylkill, Pennsylvania
Son, age 9
Schuylkill, Pennsylvania · implied b. ~1921 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blackwell |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| 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
Schuylkill-County, Pennsylvania
Son, age 19
Schuylkill-County, Pennsylvania · implied b. ~1921 — 8 household members
| Surname | Blackwell |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Frackville borough |
| 1935 Residence (County) | Schuylkill |
| Occupation | Laborer |
| Industry | Bridge Construction |
| Class of Worker | GW |
| Hours Worked | 7 |
| Income (1939) | 255 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| 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 Blackwell across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Blackwell
Son · 1940 · age 19 · b. ~1921 · Pennsylvania
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Sibling
Joan Blackwell
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Blackwell
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Blackwell
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Blackwell
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Blackwell
Sibling · 1940 · age 11
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 — Schuylkill-County, Pennsylvania
Open full size
1940 US Federal Census — Schuylkill-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03602-00095)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edith A. Dunham | 14 | Daughter | — | Pennsylvania |
| 2 | Frank Salman | 23 | Lodger | Miner | Pennsylvania |
| 3 | Emma Sullivan | 35 | Head | — | Pennsylvania |
| 4 | Rose M. Sullivan | 13 | Daughter | — | Pennsylvania |
| 5 | Nancy L. Sullivan | 6 | Daughter | — | Pennsylvania |
| 6 | Vivian Sullivan | 5 | Daughter | — | Pennsylvania |
| 7 | William Blackwell | 42 | Head | Laborer | Pennsylvania |
| 8 | Katherine Blackwell | 35 | Wife | — | Pennsylvania |
| 9 | William Blackwell | 20 | Son | Laborer | Pennsylvania |
| 10 | John Blackwell THIS PERSON | 19 | Son | Laborer | Pennsylvania |
| 11 | Francis Blackwell | 11 | Son | — | Pennsylvania |
| 12 | Joan Blackwell | 5 | Daughter | — | Pennsylvania |
| 13 | Robert Blackwell | 4 | Son | — | Pennsylvania |
| 14 | Betty Blackwell | 2 | Daughter | — | Pennsylvania |
| 15 | Daniel Roland | 40 | Head | Sub Foreman | Pennsylvania |
| 16 | Elizabeth Roland | 35 | Wife | — | Pennsylvania |
| 17 | Joseph Roland | 14 | Son | — | Pennsylvania |
| 18 | Rose Roland | 12 | Daughter | — | Pennsylvania |
| 19 | Catherine Roland | 10 | Daughter | — | Pennsylvania |
| 20 | Agnes Roland | 6 | Daughter | — | Pennsylvania |
| 21 | Jane Roland | 4 | Daughter | — | Pennsylvania |
| 22 | Shirley Roland | 1 | Daughter | — | Pennsylvania |
| 23 | Laura Shoup | 39 | Head | — | Pennsylvania |
| 24 | Mary Shoup | 1 | Daughter | — | Pennsylvania |
| 25 | Extra Line Shoup | None | — | — | — |
| 26 | John Zoba | 51 | Head | Laborer | Lithuania |
| 27 | Extra Line Zoba | None | — | — | — |
| 28 | Peter Fulmer | 74 | Head | — | Pennsylvania |
| 29 | Michael Geleskey | 46 | Head | Miner | Lithuania |
| 30 | Leroy Fischer | 60 | Head | Proprietor | Pennsylvania |
| 31 | Agnes Fischer | 21 | Wife | — | Pennsylvania |
| 32 | Caroline Brills | 57 | Head | — | Russia |
| 33 | Richard Raup | 60 | Head | — | Pennsylvania |
| 34 | Emma Raup | 52 | Wife | — | Pennsylvania |
| 35 | Matt Velassavage | 40 | Head | Laborer | Lithuania |
| 36 | Lloyd Miller | 31 | Head | Miner | Pennsylvania |
| 37 | George Schnavouch | 49 | Head | Miner | Lithuania |
| 38 | Mary Schnavouch | 45 | Wife | — | Pennsylvania |
| 39 | William Schauffer | 19 | Head | New Worker | Pennsylvania |
| 40 | Betty Schauffer | 16 | Wife | — | 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)