JF
John Fritz — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Fritz across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1893), then head of a 7-person household.
Age 47
b. ~1893
Male
Head
Born: Roumania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Fritz |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Roumania |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Alien |
| Additional Details | |
| Occupation | Laborer |
| Industry | Factory |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 96 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth Country | Romania |
| Birthplace (normalized) | roumania |
| Occupation | Laborer |
| Township / Ward | Chicago |
| Est. Birth Year | ~1893 |
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 Fritz | Head | — | 47 | ~1893 |
| Nicholas Fritz | Son | — | 23 | ~1917 |
| Magdalena Fritz | Daughter | — | 10 | ~1930 |
| Theresa Fritz | Spouse | — | 47 | ~1893 |
| Margaret Fritz | Daughter | — | 12 | ~1928 |
| Joseph Fritz | Son | — | 25 | ~1915 |
| Sophie Fritz | Daughter | — | 19 | ~1921 |
Census Appearances
1930
Lake, Indiana
Head, age 38
Lake, Indiana · implied b. ~1892 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fritz |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Roumania |
| Naturalization Status | Naturalized |
| Year of Immigration | 1914 |
| Age at First Marriage | 22 |
| Father's Birthplace | Roumania |
| Mother's Birthplace | Roumania |
| Occupation | Handy Man |
| Industry | Cement Plant |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Roumanian |
| Home Owned/Rented | R |
| Home Value / Rent | 30 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Romania |
| Birthplace (normalized) | roumania |
1940
Cook-County, Illinois
Head, age 47
Cook-County, Illinois · implied b. ~1893 — 7 household members
| Surname | Fritz |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Roumania |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Alien |
| Occupation | Laborer |
| Industry | Factory |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 96 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth Country | Romania |
| Birthplace (normalized) | roumania |
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 Fritz across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Fritz
Head · 1940 · age 47 · b. ~1893 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01007-00280)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John Rirth | 27 | Head | Vulcanizer | Illinois |
| 42 | Lucille Rirth | 29 | Wife | Floor Girl | Illinois |
| 43 | Charles Roy | 43 | Head | Machinist | Roumania |
| 44 | John Fritz THIS PERSON | 47 | Head | Laborer | Roumania |
| 45 | Theresa Fritz | 47 | Wife | — | Austria |
| 46 | Joseph Fritz | 25 | Son | Bread Wrapper | Illinois |
| 47 | Nicholas Fritz | 23 | Son | Packer | Illinois |
| 48 | Sophie Fritz | 19 | Daughter | Bus-Girl | Illinois |
| 49 | Margaret Fritz | 12 | Daughter | — | Illinois |
| 50 | Magdalena Fritz | 10 | Daughter | — | Illinois |
| 51 | Ernie Hann | 37 | Head | Laborer | Illinois |
| 52 | Angeline Hann | 34 | Wife | — | Illinois |
| 53 | Angeline Hann | 16 | Daughter | — | Illinois |
| 54 | Ernie Jr. Hann | 14 | Son | — | Illinois |
| 55 | Andrew Bailog | 35 | Head | Musician | Pennsylvania |
| 56 | Wilma Bailog | 26 | Wife | — | Pennsylvania |
| 57 | Shirley Bailog | 1 | Daughter | — | Illinois |
| 58 | Elmer Kubitz | 30 | Head | Stock Clerk | Illinois |
| 59 | Mary Kubitz | 27 | Wife | — | Michigan |
| 60 | Kathryn Kubitz | 7 | Daughter | — | Illinois |
| 61 | Kenneth Kubitz | 5 | Son | — | Illinois |
| 62 | Roberta Kubitz | 3 | Daughter | — | Illinois |
| 63 | John Steller | 53 | Head | Laborer | Hungary |
| 64 | Katherine Steller | 47 | Wife | — | Hungary |
| 65 | Katherine Steller | 17 | Daughter | — | Illinois |
| 66 | John Jr. Steller | 15 | Son | — | Illinois |
| 67 | Anna Steller | 9 | Daughter | — | Illinois |
| 68 | Fred Pruse | 63 | Head | Laborer | New York |
| 69 | Emil Forstrom | 52 | Head | Stationary Fireman | Finland |
| 70 | Bertha Dressler | 70 | Head | — | Indiana |
| 71 | William Hauchia | 42 | Head | Hustler | Germany |
| 72 | Helen Hauchia | 36 | Wife | — | Illinois |
| 73 | William Jr. Hauchia | 13 | Son | — | Illinois |
| 74 | Arthur Hauchia | 11 | Son | — | Illinois |
| 75 | Walter Hauchia | 9 | Son | — | Illinois |
| 76 | Arthur Broval | 41 | Head | Truck Driver | Illinois |
| 77 | Helen Broval | 40 | Wife | — | Austria |
| 78 | Violet Broval | 18 | Daughter | New Worker | Illinois |
| 79 | Charles Broval | 1 | Son | — | Illinois |
| 80 | Theresa Walther | 76 | Head | — | Germany |
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)