JK
John Kern — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lake-County, Indiana
Our Model Tree links this John Kern across the 1930 and 1940 US Censuses in Lake-County, Indiana (XGBoost, ~Confirmed) — first a son (b.~1922), then head of a 7-person household.
Age 18
b. ~1922
Male
Son
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Indiana |
| Surname | Kern |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | East Chicago |
| 1935 Residence (County) | Lake |
| Additional Details | |
| Industry | Yes |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | East Chicago |
| Est. Birth Year | ~1922 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Kern | Head | — | 53 | ~1887 |
| Mary Kern | Daughter | — | 15 | ~1925 |
| Joseph Kern | Son | — | 24 | ~1916 |
| John Kern | Son | — | 18 | ~1922 |
| Mary Kern | Spouse | — | 48 | ~1892 |
| Frank Kern | Son | — | 13 | ~1927 |
| Stephen Kern | Son | — | 12 | ~1928 |
Census Appearances
1930
Lake, Indiana
Son, age 8
Lake, Indiana · implied b. ~1922 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kern |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Slovakia |
| Mother's Birthplace | Hungary |
| Can Read/Write | No |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Lake-County, Indiana
Son, age 18
Lake-County, Indiana · implied b. ~1922 — 7 household members
| Surname | Kern |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | East Chicago |
| 1935 Residence (County) | Lake |
| Industry | Yes |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 18 · b. ~1922 · Indiana
★ You are viewing this record
Sibling
Joseph Kern
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Kern
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Stephen Kern
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Kern
Sibling · 1940 · age 15
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 — Lake-County, Indiana
Open full size
1940 US Federal Census — Lake-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01066-00322)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Stephen Sloan | 10 | Son | — | Indiana |
| 42 | Lillian Sloan | 4 | Daughter | — | Indiana |
| 43 | Roman Chwalikowski | 46 | Head | Millwright | Ukrainia |
| 44 | Catherine Chwalikowski | 45 | Wife | — | Ukrainia |
| 45 | Walter Chwalikowski | 23 | Son | Laborer | Indiana |
| 46 | Ann Chwalikowski | 21 | Daughter | — | Indiana |
| 47 | Michael Chwalikowski | 12 | Son | — | Indiana |
| 48 | Adrian Pasquellini | 53 | Head | Laborer | Italy |
| 49 | Isla Pasquellini | 19 | Daughter | Clerk | Italy |
| 50 | Anthony Dehonis | 27 | Son-in-law | Laborer | Italy |
| 51 | Isabella Dehonis | 25 | Wife | — | Italy |
| 52 | Michael Dehonis | 5 | Son | — | Indiana |
| 53 | Joseph Wojnowski | 27 | Head | Helper | New Jersey |
| 54 | Margaret Wojnowski | 23 | Wife | — | Ohio |
| 55 | Delores Wojnowski | 0 | Daughter | — | Indiana |
| 56 | John Kern | 53 | Head | Laborer | Hungary |
| 57 | Mary Kern | 48 | Wife | — | Hungary |
| 58 | Joseph Kern | 24 | Son | Laborer | Indiana |
| 59 | John Kern THIS PERSON | 18 | Son | — | Indiana |
| 60 | Mary Kern | 15 | Daughter | — | Indiana |
| 61 | Frank Kern | 13 | Son | — | Indiana |
| 62 | Stephen Kern | 12 | Son | — | Indiana |
| 63 | Frank Lachinski | 38 | Head | Lead-Burner | Hungary |
| 64 | Anne Lachinski | 33 | Wife | — | Pennsylvania |
| 65 | Julius Lachinski | 14 | Son | — | Indiana |
| 66 | Mary Lachinski | 12 | Daughter | — | Indiana |
| 67 | William Lachinski | 10 | Son | — | Indiana |
| 68 | Anne Lachinski | 5 | Daughter | — | Indiana |
| 69 | Ellen Lachinski | 1 | Daughter | — | Indiana |
| 70 | Peter Kocchem | 57 | Head | — | Poland |
| 71 | Alice Kocchem | 24 | Son | Laborer | Ohio |
| 72 | Julia Kocchem | 21 | Daughter | — | Indiana |
| 73 | Carl Ketajczyk | 49 | Head | Laborer | Poland |
| 74 | Helen Ketajczyk | 38 | Wife | — | Hungary |
| 75 | Ann Ketajczyk | 17 | Daughter | — | Indiana |
| 76 | Mary Ketajczyk | 11 | Daughter | — | Indiana |
| 77 | Stanley Piepkowski | 60 | Head | Laborer | Poland |
| 78 | Anne Piepkowski | 52 | Wife | — | Poland |
| 79 | Walter Piepkowski | 29 | Son | Laborer | Indiana |
| 80 | Joseph Piepkowski | 26 | Son | Laborer | Indiana |
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)