JK
John Kovach — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Hudson, New Jersey
Our Model Tree links this John Kovach across the 1930 and 1940 US Censuses in Hudson, New Jersey (XGBoost, ~Confirmed) — first a son (b.~1910), then head of a 9-person household.
Age 20
b. ~1910
Male
Son
Born: New Jersey
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Hudson, New Jersey |
| Surname | Kovach |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Czecho-Slovakia |
| Mother's Birthplace | Czecho-Slovakia |
| Additional Details | |
| Occupation | Laborer |
| Industry | Steel Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Laborer |
| Township / Ward | North Bergen Township |
| Est. Birth Year | ~1910 |
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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Kovach | Daughter | — | 18 | ~1912 |
| Margaret Kovach | Daughter | — | 10 | ~1920 |
| George Kovach | Son | — | 12 | ~1918 |
| George Kovach | Head | — | 58 | ~1872 |
| Anna Kovach | Daughter | — | 16 | ~1914 |
| Mary Kovach | Spouse | — | 51 | ~1879 |
| John Kovach | Son | — | 20 | ~1910 |
| Helen Kovach | Daughter | — | 13 | ~1917 |
| Charles Kovach | Son | — | 8 | ~1922 |
Census Appearances
1930
Hudson, New …
Son, age 20
Hudson, New Jersey · implied b. ~1910 — 9 household members
| Surname | Kovach |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Czecho-Slovakia |
| Mother's Birthplace | Czecho-Slovakia |
| Occupation | Laborer |
| Industry | Steel Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Hudson-County, New …
Son, age 28
Hudson-County, New Jersey · implied b. ~1912 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kovacs |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | North Bergen Twp |
| 1935 Residence (County) | Hudson |
| Occupation | Laborer |
| Industry | Umbrella Mfg |
| Class of Worker | PW |
| Hours Worked | 22 |
| Income (1939) | 106 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 · 1930 · age 20 · b. ~1910 · New Jersey
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Sibling
Elizabeth Kovach
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Kovach
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Kovach
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Kovach
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Kovach
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Kovach
Sibling · 1930 · age 13
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
1930 US Federal Census — Hudson, New Jersey
Open full size
1930 US Federal Census — Hudson, New Jersey
Page Contents
50 people indexed on this census page (ia:1930:newjerseycensus00reel1318:0691)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Stephen | 11 | Son | — | New Jersey |
| 52 | John | 11 | Nephew | — | New Jersey |
| 53 | John Beres | 33 | Head | Laborer | Czecho-Slovakia |
| 54 | Ethel Beres | 43 | Wife | — | Russia |
| 55 | George Sandor | 47 | Head | Laborer | Hungary |
| 56 | Mary Sandor | 41 | Wife | — | Hungary |
| 57 | John Sandor | 18 | Son | Helper | New Jersey |
| 58 | George Sandor | 15 | Son | — | New Jersey |
| 59 | Mary Sandor | 12 | Daughter | — | New Jersey |
| 60 | Andrew Bodnar | 42 | Head | Steel Worker | Roumania |
| 61 | Sarah Bodnar | 37 | Wife | — | Roumania |
| 62 | Elizabeth Bodnar | 13 | Daughter | — | New Jersey |
| 63 | Mary Bodnar | 11 | Daughter | — | New Jersey |
| 64 | Andrew Bodnar | 6 | Son | — | New Jersey |
| 65 | Emma Szigeti | 68 | Servant | Housework | Hungary |
| 66 | John Duhon | 48 | Head | Operator | New Jersey |
| 67 | Anna Duhon | 33 | Wife | — | New Jersey |
| 68 | Mary Duhon | 15 | Daughter | — | New Jersey |
| 69 | Alice Duhon | 12 | Daughter | — | New Jersey |
| 70 | John Duhon | 7 | Son | — | New Jersey |
| 71 | Charles Duhon | 4 | Son | — | New Jersey |
| 72 | James Duhon | 1 | Son | — | New Jersey |
| 73 | George Kovach | 58 | Head | Laborer | Czecho-Slovakia |
| 74 | Mary Kovach | 51 | Wife | — | Czecho-Slovakia |
| 75 | John Kovach THIS PERSON | 20 | Son | Laborer | New Jersey |
| 76 | Elizabeth Kovach | 18 | Daughter | — | New Jersey |
| 77 | Anna Kovach | 16 | Daughter | — | New Jersey |
| 78 | Helen Kovach | 13 | Daughter | — | New Jersey |
| 79 | George Kovach | 12 | Son | — | New Jersey |
| 80 | Margaret Kovach | 10 | Daughter | — | New Jersey |
| 81 | Charles Kovach | 8 | Son | — | New Jersey |
| 82 | Gabriel Andres | 68 | Head | — | Hungary |
| 83 | George Andres | 31 | Son | Laborer | New Jersey |
| 84 | Joseph Long | 27 | Head | Laborer | New Jersey |
| 85 | Mary Long | 22 | Wife | — | New Jersey |
| 86 | George Picon | 41 | Head | Operator | Hungary |
| 87 | Mary Picon | 40 | Wife | — | Hungary |
| 88 | George Picon | 19 | Son | Laborer | New Jersey |
| 89 | Helen Picon | 17 | Daughter | — | New Jersey |
| 90 | Thomas Veres | 41 | Head | Laborer | Roumania |
| 91 | Mary Veres | 38 | Wife | — | Roumania |
| 92 | John Veres | 17 | Son | — | New Jersey |
| 93 | Mary Veres | 12 | Daughter | — | New Jersey |
| 94 | Elizabeth Veres | 10 | Daughter | — | New Jersey |
| 95 | George Veres | 8 | Son | — | New Jersey |
| 96 | Louis Veres | 38 | Head | Laborer | Roumania |
| 97 | Florence Veres | 33 | Wife | — | Roumania |
| 98 | Louis Veres | 4 | Son | — | New Jersey |
| 99 | Frank Brosson | 48 | Head | Laborer | Yugoslavia |
| 100 | Mary Brosson | 42 | Wife | — | Roumania |
Related Census Records
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)