JK
John Kovach — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Wyandotte-County, Kansas
Our Model Tree links this John Kovach across the 1930 and 1940 US Censuses in Wyandotte-County, Kansas (XGBoost, ~Confirmed) — first a son (b.~1924), then head of a 10-person household.
Age 16
b. ~1924
Male
Son
Born: Kansas
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Wyandotte-County, Kansas |
| Surname | Kovach |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | Kansas City, City |
| 1935 Residence (County) | Wyandotte |
| Additional Details | |
| Hours Worked | 0 |
| Highest Grade | Hs 1 |
| 1935 Residence | Same house |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Township / Ward | Kansas City City |
| Est. Birth Year | ~1924 |
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 |
|---|---|---|---|---|
| Mary Kovach | Daughter | — | 25 | ~1915 |
| Anthony Kovach | Son | — | 27 | ~1913 |
| Ernest Kovach | Son | — | 12 | ~1928 |
| Emma Kovach | Daughter | — | 20 | ~1920 |
| Albert Kovach | Son | — | 14 | ~1926 |
| Anthony Kovach | Head | — | 54 | ~1886 |
| Wilma Kovach | Daughter | — | 18 | ~1922 |
| Fred Kovach | Son | — | 10 | ~1930 |
| Helen Kovach | Spouse | — | 48 | ~1892 |
| John Kovach | Son | — | 16 | ~1924 |
Census Appearances
1930
Wyandotte, Kansas
Son, age 7
Wyandotte, Kansas · implied b. ~1923 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kovach |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Yugoslavia |
| Mother's Birthplace | Yugoslavia |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Wyandotte-County, Kansas
Son, age 16
Wyandotte-County, Kansas · implied b. ~1924 — 10 household members
| Surname | Kovach |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | Kansas City, City |
| 1935 Residence (County) | Wyandotte |
| Hours Worked | 0 |
| Highest Grade | Hs 1 |
| 1935 Residence | Same house |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
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 Kovach across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Kovach
Son · 1940 · age 16 · b. ~1924 · Kansas
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Sibling
Wilma Kovach
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anthony Kovach
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Kovach
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Fred Kovach
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Emma Kovach
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Albert Kovach
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ernest Kovach
Sibling · 1940 · age 12
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 — Wyandotte-County, Kansas
Open full size
1940 US Federal Census — Wyandotte-County, Kansas
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01267-00038)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Richard Chenoweth | 4 | Son | — | Kansas |
| 2 | Frank Gagar | 31 | Head | Bartender | Kansas |
| 3 | Sylvia Gagar | 26 | Wife | Wrapper | Kansas |
| 4 | Anthony Kovach | 54 | Head | Labor | Jugoslavia |
| 5 | Helen Kovach | 48 | Wife | Sausage Pack | Jugoslavia |
| 6 | Anthony Jr. Kovach | 27 | Son | Solicitor | Kansas |
| 7 | Mary Kovach | 25 | Daughter | Wrapper | Kansas |
| 8 | Emma Kovach | 20 | Daughter | Dress Designer | Kansas |
| 9 | Wilma Kovach | 18 | Daughter | — | Kansas |
| 10 | John Kovach THIS PERSON | 16 | Son | — | Kansas |
| 11 | Albert Kovach | 14 | Son | — | Kansas |
| 12 | Ernest Kovach | 12 | Son | — | Kansas |
| 13 | Fred Richard Kovach | 10 | Son | — | Kansas |
| 14 | Frank Bukovac | 52 | Head | Cabinet Maker | Jugoslavia |
| 15 | Theresa Bukovac | 50 | Wife | — | Jugoslavia |
| 16 | Mary Bukovac | 19 | Daughter | — | Kansas |
| 17 | Joseph Bukovac | 16 | Son | — | Kansas |
| 18 | Rudolf Bukovac | 13 | Son | — | Kansas |
| 19 | Draga Brucan | 45 | Head | Clerk | Jugoslavia |
| 20 | Katherine Brucan | 24 | Daughter | Power Machine Operator | Kansas |
| 21 | Anthony Brucan | 21 | Son | New Laborer | Kansas |
| 22 | William Brucan | 20 | Son | Truck Driver | Kansas |
| 23 | Irene Brucan | 17 | Daughter | — | Kansas |
| 24 | Tom Modrcin | 55 | Brother | Butcher | Jugoslavia |
| 25 | Isabelle Glenn | 59 | Head | Seamstress | Ireland |
| 26 | James Glenn | 17 | Son | — | Kansas |
| 27 | Isabelle Glenn | 16 | Daughter | — | Kansas |
| 28 | Joan Glenn | 12 | Daughter | — | Kansas |
| 29 | Barney Doyle | 72 | Head | — | Missouri |
| 30 | Joseph Doyle | 34 | Son | Labor | Missouri |
| 31 | Eva H. Doyle | 28 | Daughter-in-law | Housework | Kansas |
| 32 | Doris Dawn Doyle | 1 | Granddaughter | — | Kansas |
| 33 | Frank Paver | 32 | Head | Assistant Foreman | Kansas |
| 34 | Helen M. Paver | 27 | Wife | Housework | Kansas |
| 35 | Donnell F. Paver | 9 | Son | — | Kansas |
| 36 | Jerrold J. Paver | 2 | Son | — | Kansas |
| 37 | Michael M. Paver | 22 | Brother | Labor | Kansas |
| 38 | Andrew Hurabjia | 52 | Head | Labor | Jugoslavia |
| 39 | Geo Jakopic | 48 | Partner | — | Jugoslavia |
| 40 | Mary Wolf | 54 | Head | Labor | Jugoslavia |
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)