JK
John Kern — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lehigh-County, Pennsylvania
Our Model Tree links this John Kern across the 1930 and 1940 US Censuses in Lehigh-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1919), then head of a 17-person household.
Age 21
b. ~1919
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lehigh-County, Pennsylvania |
| Surname | Kern |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Allentown City |
| 1935 Residence (County) | Lehigh |
| Additional Details | |
| Occupation | Laborer |
| Industry | Soft drinks |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 600 |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Laborer |
| Township / Ward | Allentown City |
| Est. Birth Year | ~1919 |
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.
17 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Louis Nickisher | Son | — | 22 | ~1918 |
| William Nickisher | Son | — | 24 | ~1916 |
| Eunice Mcfee | Daughter | — | 2 | ~1938 |
| Joseph Kern | Son | — | 26 | ~1914 |
| Rudolph Nickisher | Son | — | 18 | ~1922 |
| Peter Tobias | Son | — | 1 | ~1939 |
| Mary Nickisher | Daughter | — | 16 | ~1924 |
| Margaret Hendricks | Daughter | — | 18 | ~1922 |
| Edward Nickisher | Son | — | 20 | ~1920 |
| Marie Kern | Daughter | — | 24 | ~1916 |
| Mary Nickisher | Spouse | — | 52 | ~1888 |
| Raymond Ernst | Head | — | 15 | ~1925 |
| Joshua Miller | Other | — | 69 | ~1871 |
| Henry Reese | Other | — | 33 | ~1907 |
| Carl Hock | Son | — | 3 | ~1937 |
| Edna Hendricks | Daughter | — | 16 | ~1924 |
| John Kern | Son | — | 21 | ~1919 |
Census Appearances
1930
Lehigh, Pennsylvania
Son, age 11
Lehigh, Pennsylvania · implied b. ~1919 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kern |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Austria-Styria |
| Mother's Birthplace | Austria-Styria |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Lehigh-County, Pennsylvania
Son, age 21
Lehigh-County, Pennsylvania · implied b. ~1919 — 17 household members
| Surname | Kern |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Allentown City |
| 1935 Residence (County) | Lehigh |
| Occupation | Laborer |
| Industry | Soft drinks |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 600 |
| Highest Grade | Hs 1 |
| 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 Kern across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Kern
Son · 1940 · age 21 · b. ~1919 · Pennsylvania
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Sibling
Mary Nickisher
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carl Hock
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Kern
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Nickisher
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Hendricks
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Kern
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louis Nickisher
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rudolph Nickisher
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Nickisher
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eunice Mcfee
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Peter Tobias
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edna Hendricks
Sibling · 1940 · age 16
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
30 people indexed on this census page (nara:1940:m-t0627-03543-00603)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Raymond Ernst | 15 | Head | — | Pennsylvania |
| 2 | Joshua Miller | 69 | Father-in-law | 800 Sailor | Pennsylvania |
| 5 | Eunice, M. Mcfee | 2 | Daughter | — | Pennsylvania |
| 7 | Henry Reese | 33 | Lodger | Salesman | Pennsylvania |
| 9 | Peter, Jr. Tobias | 1 | Son | — | Pennsylvania |
| 11 | Mary Nickisher | 52 | Wife | — | Austria |
| 12 | William Nickisher | 24 | Son | Laborer | Pennsylvania |
| 13 | Louis Nickisher | 22 | Son | Laborer | Pennsylvania |
| 14 | Edward Nickisher | 20 | Son | New Worker | Pennsylvania |
| 15 | Rudolph Nickisher | 18 | Son | — | Pennsylvania |
| 16 | Mary Nickisher | 16 | Daughter | — | Pennsylvania |
| 18 | Joseph Kern | 26 | Son | Laborer | Pennsylvania |
| 19 | Marie Kern | 24 | Daughter | Feeder | Pennsylvania |
| 20 | John Kern THIS PERSON | 21 | Son | Laborer | Pennsylvania |
| 22 | Carl Hock | 3 | Son | — | Pennsylvania |
| 24 | Margaret Hendricks | 18 | Daughter | Machine Operator | Pennsylvania |
| 25 | Edna Hendricks | 16 | Daughter | — | Pennsylvania |
| 26 | Frank Kleiber | 59 | Head | 150 Laborer | Austria |
| 27 | Cecelia Kleiber | 59 | Wife | — | Austria |
| 28 | Joseph Kleiber | 23 | Son | Truck Driver | Pennsylvania |
| 30 | Jean Palumbo | 4 | Daughter | — | Pennsylvania |
| 31 | Joseph Gardner | 36 | Son-in-law | Weaver | Austria |
| 32 | Frieda Gardner | 29 | Daughter | — | Pennsylvania |
| 33 | Charles Gardner | 9 | Grand-son | — | Pennsylvania |
| 34 | Edward Wind | 31 | Son | Weaver | Pennsylvania |
| 35 | Charles Schmisl | 43 | Head | Steward | Austria |
| 36 | Frances Schmisl | 43 | Wife | — | Austria |
| 37 | Angela Schmisl | 22 | Daughter | — | Pennsylvania |
| 38 | Margaret Schmisl | 20 | Daughter | — | Pennsylvania |
| 40 | Teresa Flamish | 27 | Daughter | — | 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)