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John Jacobs — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lucas-County, Ohio
Our Model Tree links this John Jacobs across the 1920, 1930 and 1940 US Censuses in Lucas-County, Ohio (XGBoost, ~Confirmed) — first a head (b.~1876), then head of a 3-person household.
Age 64
b. ~1876
Male
Head
Born: Hungary
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Lucas-County, Ohio |
| Surname | Jacobs |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 64 |
| Marital Status | Widowed |
| Birthplace | Hungary |
| 1935 Residence (City) | Toledo |
| 1935 Residence (County) | Lucas |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Hungary |
| Birthplace (normalized) | hungary |
| Township / Ward | Toledo |
| Est. Birth Year | ~1876 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Lola Jacobs | Daughter | — | 25 | ~1915 |
| John Jacobs | Head | — | 64 | ~1876 |
| Joseph Jacobs | Son | — | 34 | ~1906 |
Census Appearances
1920
Lucas, Ohio
Head, age 44
Lucas, Ohio · implied b. ~1876 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jakab |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Hungary |
| Year of Immigration | 1899 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Hungary |
| Mother's Birthplace | Hungary |
| Occupation | Laborer |
| Industry | Brickyard |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Magyar |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth Country | Hungary |
| Birthplace (normalized) | hungary |
1930
Lucas, Ohio
Head, age 54
Lucas, Ohio · implied b. ~1876 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacob |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Hungary |
| Naturalization Status | Naturalized |
| Year of Immigration | 1894 |
| Age at First Marriage | 25 |
| Father's Birthplace | Hungary |
| Mother's Birthplace | Hungary |
| Occupation | Laborer |
| Industry | Brick Company |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Magyar |
| Home Owned/Rented | O |
| Home Value / Rent | 3000 |
| Birth Country | Hungary |
| Birthplace (normalized) | hungary |
1940
Lucas-County, Ohio
Head, age 64
Lucas-County, Ohio · implied b. ~1876 — 3 household members
| Surname | Jacobs |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 64 |
| Marital Status | Widowed |
| Birthplace | Hungary |
| 1935 Residence (City) | Toledo |
| 1935 Residence (County) | Lucas |
| Naturalization Status | Naturalized |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Hungary |
| Birthplace (normalized) | hungary |
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 Jacobs across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Jacobs
Head · 1940 · age 64 · b. ~1876 · Ohio
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Lucas-County, Ohio
Open full size
1940 US Federal Census — Lucas-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03266-00413)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Elizabeth Vasko | 23 | Daughter | Assembler | Ohio |
| 42 | John Jacobs THIS PERSON | 64 | Head | — | Hungary |
| 43 | Joseph Jacobs | 34 | Son | Baker | Ohio |
| 44 | Lola Jacobs | 25 | Daughter | Finisher | Ohio |
| 45 | Steve Hurtay | 52 | Head | Blacksmith | Hungary |
| 46 | Barbara Hurtay | 45 | Wife | — | Hungary |
| 47 | Steve Jr. Hurtay | 24 | Son | Laborer | Ohio |
| 48 | Frank Hurtay | 22 | Son | — | Ohio |
| 49 | Joe Hurtay | 19 | Son | — | Ohio |
| 50 | Albert Hurtay | 14 | Son | — | Ohio |
| 51 | John Hurtay | 12 | Son | — | Ohio |
| 52 | Betty Hurtay | 10 | Daughter | — | Ohio |
| 53 | Andrew Hurtay | 6 | Son | — | Ohio |
| 54 | Robert Hurtay | 1 | Son | — | Ohio |
| 55 | John Kalany | 54 | Head | Laborer | Hungary |
| 56 | Mary Kalany | 48 | Wife | — | Hungary |
| 57 | John Kalany | 21 | Son | — | Ohio |
| 58 | Louis Kalany | 19 | Son | — | Ohio |
| 59 | Agnes Kalany | 17 | Daughter | — | Ohio |
| 60 | Theresa Kalany | 15 | Daughter | — | Ohio |
| 61 | John Agocs | 58 | Head | Gardner | Hungary |
| 62 | Mary Agocs | 54 | Wife | — | Hungary |
| 63 | Albert Agocs | 28 | Son | Laborer | Ohio |
| 64 | Paul Kochanowski | 22 | Son-in-law | Machine | Ohio |
| 65 | Helen Kochanowski | 20 | Daughter | — | Ohio |
| 66 | Frank Szemereky | 60 | Head | Manager | Hungary |
| 67 | Catherine Szemereky | 48 | Wife | — | Hungary |
| 68 | Ernest Szemereky | 21 | Son | — | Ohio |
| 69 | Donald Harpster | 31 | Son-in-law | Salesman | Ohio |
| 70 | Betty Harpster | 30 | Daughter | — | Ohio |
| 71 | Donald Harpster | 2 | Son | — | Ohio |
| 72 | John Tyndodi | 49 | Head | Repair Man | Hungary |
| 73 | Mary Tyndodi | 47 | Wife | — | Hungary |
| 74 | John Tyndodi | 22 | Son | — | Ohio |
| 75 | John Zam | 30 | Head | Milk Deliverer | Ohio |
| 76 | Mary Zam | 27 | Wife | — | Ohio |
| 77 | John Jr. Zam | 7 | Son | — | Ohio |
| 78 | Francis Zam | 5 | Son | — | Ohio |
| 79 | Joseph L. Zam | 5 | Son | — | Ohio |
| 80 | Barbara Mondy | 74 | Head | — | Hungary |
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)