JK
John Keller — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this John Keller across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 10-person household.
Age 17
b. ~1923
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Keller |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Glassport borough |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Glassport Borough |
| Est. Birth Year | ~1923 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Keller | Daughter | — | 20 | ~1920 |
| Theresa Keller | Daughter | — | 14 | ~1926 |
| Rose Keller | Daughter | — | 12 | ~1928 |
| Mildred Keller | Daughter | — | 9 | ~1931 |
| John Keller | Head | — | 44 | ~1896 |
| John Keller | Son | — | 17 | ~1923 |
| Lawrence Keller | Son | — | 7 | ~1933 |
| Joseph Keller | Son | — | 20 | ~1920 |
| Mary Keller | Son | — | 15 | ~1925 |
| Anna Keller | Spouse | — | 41 | ~1899 |
Census Appearances
1930
Allegheny, Pennsylvania
Son, age 7
Allegheny, Pennsylvania · implied b. ~1923 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kollar |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Age at First Marriage | 9 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Czechoslovakia |
| Veteran | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 17
Allegheny-County, Pennsylvania · implied b. ~1923 — 10 household members
| Surname | Keller |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Glassport borough |
| 1935 Residence (County) | Allegheny |
| Class of Worker | 0 |
| Highest Grade | H 3 |
| 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 Keller across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Keller
Son · 1940 · age 17 · b. ~1923 · Pennsylvania
★ You are viewing this record
Sibling
Rose Keller
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mildred Keller
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Theresa Keller
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Keller
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Keller
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Keller
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Keller
Sibling · 1940 · age 7
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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03404-00667)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William Benton | 47 | Head | — | Pennsylvania |
| 42 | Elizabeth Benton | 19 | Daughter | — | Pennsylvania |
| 43 | Gilbert Benton | 18 | Son | — | Pennsylvania |
| 44 | Albert Fisher | 63 | Head | Laborer | Germany |
| 45 | Jennie Fisher | 55 | Wife | — | Pennsylvania |
| 46 | Andrew Michaelson | 61 | Head | Laborer | Czechoslovakia |
| 47 | Anna Michaelson | 52 | Wife | — | Czechoslovakia |
| 48 | Margaret Michaelson | 29 | Daughter | Saleslady | Pennsylvania |
| 49 | Amba Michaelson | 25 | Daughter | — | Pennsylvania |
| 50 | Mary Michaelson | 21 | Daughter | — | Ohio |
| 51 | Anastasia Kruyla | 41 | Head | Laborer | Czechoslovakia |
| 52 | Mary Kruyla | 34 | Wife | — | Czechoslovakia |
| 53 | Joseph Kruyla | 9 | Son | — | Pennsylvania |
| 54 | Marion Kruyla | 8 | Daughter | — | Pennsylvania |
| 55 | Betty Kruyla | 6 | Daughter | — | Pennsylvania |
| 56 | Elizabeth Kruyla | 4 | Daughter | — | Pennsylvania |
| 57 | John Mcconnell | 27 | Head | Tool Maker | Pennsylvania |
| 58 | Charles Mcconnell | 25 | Wife | — | Pennsylvania |
| 59 | Charles Carlson | 56 | Head | Laborer | Finland |
| 60 | Hilma Carlson | 57 | Wife | — | Finland |
| 61 | Leo Nelson | 22 | Lodger | Laborer | Pennsylvania |
| 62 | — | None | — | — | — |
| 63 | David Kristinen | 57 | Head | Laborer | Finland |
| 64 | Lydia Kristinen | 53 | Wife | — | Finland |
| 65 | Doris Kristinen | 27 | Daughter | — | Pennsylvania |
| 66 | Catherine Kristinen | 23 | Daughter | Teacher | Pennsylvania |
| 67 | Paul Kristinen | 18 | Son | — | Pennsylvania |
| 68 | Paul Smolchek | 29 | Head | Laborer | Pennsylvania |
| 69 | Mary Smolchek | 24 | Wife | — | Pennsylvania |
| 70 | James Smolchek | 3 | Son | — | Pennsylvania |
| 71 | John Keller | 44 | Head | Craneman | Pennsylvania |
| 72 | Anna Keller | 41 | Wife | — | Czechoslovakia |
| 73 | Elizabeth Keller | 20 | Daughter | Laborer | Pennsylvania |
| 74 | Joseph Keller | 20 | Son | — | Pennsylvania |
| 75 | John Keller THIS PERSON | 17 | Son | — | Pennsylvania |
| 76 | Mary Keller | 15 | Son | — | Pennsylvania |
| 77 | Theresa Keller | 14 | Daughter | — | Pennsylvania |
| 78 | Rose Keller | 12 | Daughter | — | Pennsylvania |
| 79 | Mildred Keller | 9 | Daughter | — | Pennsylvania |
| 80 | Lawrence Keller | 7 | Son | — | Pennsylvania |
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)