JK
John Keller — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lehigh-County, Pennsylvania
Our Model Tree links this John Keller across the 1930 and 1940 US Censuses in Lehigh-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1920), then head of a 8-person household.
Age 20
b. ~1920
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lehigh-County, Pennsylvania |
| Surname | Keller |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Coplay Borough |
| 1935 Residence (County) | Lehigh |
| Additional Details | |
| Occupation | new worker |
| Class of Worker | GW |
| Hours Worked | 75 |
| Income (1939) | 0 |
| Highest Grade | H 1 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | New Worker |
| Township / Ward | Coplay Borough |
| 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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Hilda Keller | Daughter | — | 8 | ~1932 |
| Mary Keller | Daughter | — | 10 | ~1930 |
| George Keller | Head | — | 45 | ~1895 |
| Joseph Keller | Son | — | 16 | ~1924 |
| John Keller | Son | — | 20 | ~1920 |
| Anton Keller | Son | — | 22 | ~1918 |
| George Keller | Son | — | 19 | ~1921 |
| Mary Keller | Spouse | — | 44 | ~1896 |
Census Appearances
1930
Lehigh, Pennsylvania
Son, age 8
Lehigh, Pennsylvania · implied b. ~1922 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Keller |
| Given Name | John A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Austria |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Lehigh-County, Pennsylvania
Son, age 20
Lehigh-County, Pennsylvania · implied b. ~1920 — 8 household members
| Surname | Keller |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Coplay Borough |
| 1935 Residence (County) | Lehigh |
| Occupation | new worker |
| Class of Worker | GW |
| Hours Worked | 75 |
| Income (1939) | 0 |
| Highest Grade | H 1 |
| 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 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 20 · b. ~1920 · Pennsylvania
★ You are viewing this record
Sibling
Anton Keller
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Keller
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Keller
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Keller
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hilda Keller
Sibling · 1940 · age 8
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 — Lehigh-County, Pennsylvania
Open full size
1940 US Federal Census — Lehigh-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03546-00197)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Irene Lehick | 13 | Daughter | — | Pennsylvania |
| 2 | Anna Lehick | 12 | Daughter | — | Pennsylvania |
| 3 | Paul Lehick | 7 | Son | — | Pennsylvania |
| 4 | Richard Lehick | 5 | Son | — | Pennsylvania |
| 5 | George Keller | 45 | Head | Kiln Burner | Austria |
| 6 | Mary Keller | 44 | Wife | — | Austria |
| 7 | Anton Keller | 22 | Son | Laborer | Pennsylvania |
| 8 | John Keller THIS PERSON | 20 | Son | New Worker | Pennsylvania |
| 9 | George Jr. Keller | 19 | Son | New Worker | Pennsylvania |
| 10 | Joseph Keller | 16 | Son | — | Pennsylvania |
| 11 | Mary Keller | 10 | Daughter | — | Pennsylvania |
| 12 | Hilda Keller | 8 | Daughter | — | Pennsylvania |
| 13 | Joseph Keppel | 56 | Head | Laborer | Austria |
| 14 | Julia Keppel | 44 | Wife | — | Austria |
| 15 | John Stotler | 30 | Step son | Laborer | Pennsylvania |
| 16 | Edward Stotler | 25 | Step son | Laborer | Pennsylvania |
| 17 | Russell Keppel | 17 | Son | New Worker | Pennsylvania |
| 18 | Anna Keppel | 20 | Step daughter | Seamstress | Pennsylvania |
| 19 | Alfred Keppel | 10 | Son | — | Pennsylvania |
| 20 | Charles Keeling | 57 | Head | Sink Digger | Pennsylvania |
| 21 | Jennie Keeling | 53 | Wife | — | Pennsylvania |
| 22 | Lawson Keeling | 30 | Son | Roofing Work | Pennsylvania |
| 23 | Gerald Keeling | 15 | Son | — | Pennsylvania |
| 24 | Clarence Zellner | 43 | Head | Clerk | Pennsylvania |
| 25 | Rachel Zellner | 41 | Wife | — | Pennsylvania |
| 26 | C. J. Zellner | 63 | Father | — | Pennsylvania |
| 27 | Charles Mohr | 67 | Head | Laborer | Pennsylvania |
| 28 | Charles Mrs. Mohr | 64 | Wife | — | Pennsylvania |
| 29 | Walter Mohr | 44 | Son | Laborer | Pennsylvania |
| 30 | Harold Mohr | 28 | Son | Flesher | Pennsylvania |
| 31 | Paul Mohr | 27 | Son | Laborer | Pennsylvania |
| 32 | Raymond Mohr | 37 | Head | Assembly | Pennsylvania |
| 33 | Viola Mohr | 31 | Wife | — | Pennsylvania |
| 34 | Jean Mohr | 11 | Daughter | — | Pennsylvania |
| 35 | Forrest Mohr | 10 | Son | — | Pennsylvania |
| 36 | Donald Mohr | 9 | Son | — | Pennsylvania |
| 37 | Lois Mohr | 5 | Daughter | — | Pennsylvania |
| 38 | Robert Mohr | 4 | Son | — | Pennsylvania |
| 39 | J. Arthur Haller | 55 | Head | Pipe Fitter | Pennsylvania |
| 40 | A. Clara Haller | 55 | Wife | — | 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)