JK
John Kovach — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cuyahoga, Ohio
Our Model Tree links this John Kovach across the 1930 and 1940 US Censuses in Cuyahoga, Ohio (XGBoost, ~Confirmed) — first a son (b.~1911), then head of a 11-person household.
Age 19
b. ~1911
Male
Son
Born: Pennsylvania
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cuyahoga, Ohio |
| Surname | Kovach |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Czechoslovakia |
| Mother's Birthplace | Czechoslovakia |
| Additional Details | |
| Occupation | Laborer |
| Industry | Steel Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Laborer |
| Township / Ward | Cleveland City |
| Est. Birth Year | ~1911 |
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.
11 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Kovach | Son | — | 19 | ~1911 |
| Joseph Kovach | Son | — | 9 | ~1921 |
| Mary Kovach | Daughter | — | 17 | ~1913 |
| Andrew Kovach | Son | — | 15 | ~1915 |
| Helen Kovach | Daughter | — | 5 | ~1925 |
| Mary Kovach | Spouse | — | 40 | ~1890 |
| Pauline Kovach | Daughter | — | 2 | ~1928 |
| John Kovach | Head | — | 45 | ~1885 |
| Anna Kovach | Daughter | — | 11 | ~1919 |
| Margaret Kovach | Daughter | — | 7 | ~1923 |
| William Kovach | Son | — | 13 | ~1917 |
Census Appearances
1930
Cuyahoga, Ohio
Son, age 19
Cuyahoga, Ohio · implied b. ~1911 — 11 household members
| Surname | Kovach |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Czechoslovakia |
| Mother's Birthplace | Czechoslovakia |
| Occupation | Laborer |
| Industry | Steel Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Cuyahoga-County, Ohio
Head, age 30
Cuyahoga-County, Ohio · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | KoVace |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Cleveland |
| 1935 Residence (County) | Cuyahoga |
| Occupation | Investigator |
| Industry | City Hospital Council |
| Class of Worker | GW |
| Hours Worked | 44 |
| Income (1939) | 1680 |
| Highest Grade | C 4 |
| 1935 Residence | Ohio |
| 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 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 19 · b. ~1911 · Ohio
★ You are viewing this record
Sibling
Anna Kovach
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Kovach
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Andrew Kovach
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Kovach
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Kovach
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Kovach
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Kovach
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Pauline Kovach
Sibling · 1930 · age 2
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 — Cuyahoga, Ohio
Open full size
1930 US Federal Census — Cuyahoga, Ohio
Page Contents
50 people indexed on this census page (ia:1930:ohiocensus00reel1766:0918)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Casper Lauck | 51 | Head | Blacksmith | Pennsylvania |
| 52 | Sarah Lauck | 51 | Wife | — | Pennsylvania |
| 53 | Joseph Lauck | 21 | Son | — | Pennsylvania |
| 54 | Mary Lauck | 18 | Daughter | — | Pennsylvania |
| 55 | Anna Lauck | 16 | Daughter | — | Pennsylvania |
| 56 | Casper Lauck | 14 | Son | — | Pennsylvania |
| 57 | William Lauck | 12 | Son | — | Pennsylvania |
| 58 | John Lauck | 10 | Son | — | Pennsylvania |
| 59 | Robert Lauck | 8 | Son | — | Pennsylvania |
| 60 | James Lauck | 6 | Son | — | Pennsylvania |
| 61 | Francis Lauck | 4 | Son | — | Pennsylvania |
| 62 | Edward Lauck | 2 | Son | — | Pennsylvania |
| 63 | Margaret Lauck | 1 | Daughter | — | Pennsylvania |
| 64 | Catherine Lauck | 0 | Daughter | — | Pennsylvania |
| 65 | John Lauck | 49 | Brother | — | Pennsylvania |
| 66 | John Kovach | 45 | Head | Worker | Czechoslovakia |
| 67 | Mary Kovach | 40 | Wife | — | Czechoslovakia |
| 68 | John Kovach THIS PERSON | 19 | Son | Laborer | Pennsylvania |
| 69 | Mary Kovach | 17 | Daughter | — | Pennsylvania |
| 70 | Andrew Kovach | 15 | Son | — | Pennsylvania |
| 71 | William Kovach | 13 | Son | — | Pennsylvania |
| 72 | Anna Kovach | 11 | Daughter | — | Pennsylvania |
| 73 | Joseph Kovach | 9 | Son | — | Pennsylvania |
| 74 | Margaret Kovach | 7 | Daughter | — | Pennsylvania |
| 75 | Helen Kovach | 5 | Daughter | — | Pennsylvania |
| 76 | Pauline Kovach | 2 | Daughter | — | Pennsylvania |
| 77 | Paul Kovach | 31 | Head | Mechanic | Poland |
| 78 | Mary Kovach | 28 | Wife | — | Pennsylvania |
| 79 | Helen Kovach | 8 | Daughter | — | Pennsylvania |
| 80 | Paul Kovach | 6 | Son | — | Pennsylvania |
| 81 | Edward Kovach | 4 | Son | — | Pennsylvania |
| 82 | Alice Kovach | 2 | Daughter | — | Pennsylvania |
| 83 | Robert Kovach | 1 | Son | — | Pennsylvania |
| 84 | Joseph Kovach | 0 | Son | — | Pennsylvania |
| 85 | John Kovach | 39 | Head | Laborer | Czechoslovakia |
| 86 | Mary Kovach | 32 | Wife | — | Czechoslovakia |
| 87 | John Kovach | 13 | Son | — | Pennsylvania |
| 88 | Mary Kovach | 11 | Daughter | — | Pennsylvania |
| 89 | Joseph Kovach | 9 | Son | — | Pennsylvania |
| 90 | Helen Kovach | 7 | Daughter | — | Pennsylvania |
| 91 | Dorothy Kovach | 5 | Daughter | — | Pennsylvania |
| 92 | Elizabeth Kovach | 3 | Daughter | — | Pennsylvania |
| 93 | Margaret Kovach | 1 | Daughter | — | Pennsylvania |
| 94 | George Kovach | 48 | Head | Brakeman | Germany |
| 95 | Anna Kovach | 38 | Wife | — | Germany |
| 96 | George Kovach | 17 | Son | — | Pennsylvania |
| 97 | Anna Kovach | 14 | Daughter | — | Pennsylvania |
| 98 | John Kovach | 12 | Son | — | Pennsylvania |
| 99 | William Kovach | 10 | Son | — | Pennsylvania |
| 100 | Robert Kovach | 7 | Son | — | Pennsylvania |
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)