JF
John Fritz — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lake-County, Indiana
Our Model Tree links this John Fritz across the 1930 and 1940 US Censuses in Lake-County, Indiana (XGBoost, ~Confirmed) — first a son (b.~1927), then head of a 10-person household.
Age 13
b. ~1927
Male
Son
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Indiana |
| Surname | Fritz |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Crown Point |
| 1935 Residence (County) | Lake |
| Additional Details | |
| Highest Grade | 4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | Crown Point |
| Est. Birth Year | ~1927 |
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 |
|---|---|---|---|---|
| William Fritz | Son | — | 5 | ~1935 |
| Barbara Fritz | Daughter | — | 1 | ~1939 |
| Joann Fritz | Daughter | — | 8 | ~1932 |
| Delores Fritz | Daughter | — | 3 | ~1937 |
| Clifford Fritz | Head | — | 40 | ~1900 |
| Lillian Fritz | Daughter | — | ~1940 | |
| John Fritz | Son | — | 13 | ~1927 |
| Mary Fritz | Daughter | — | 10 | ~1930 |
| Edna Fritz | Spouse | — | 34 | ~1906 |
| Harvey Fritz | Son | — | 16 | ~1924 |
Census Appearances
1930
Lake, Indiana
Son, age 3
Lake, Indiana · implied b. ~1927 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fritte |
| Given Name | Joe |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Indiana |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Lake-County, Indiana
Son, age 13
Lake-County, Indiana · implied b. ~1927 — 10 household members
| Surname | Fritz |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Crown Point |
| 1935 Residence (County) | Lake |
| Highest Grade | 4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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.
Show:
This person
Anchor record
John Fritz
Son · 1940 · age 13 · b. ~1927 · Indiana
★ You are viewing this record
Sibling
Delores Fritz
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lillian Fritz
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joann Fritz
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harvey Fritz
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Barbara Fritz
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Fritz
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Fritz
Sibling · 1940 · age 10
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 — Lake-County, Indiana
Open full size
1940 US Federal Census — Lake-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01064-00428)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Millard C. Hooks | 39 | Head | Watchman | Illinois |
| 2 | Frances M. Hooks | 39 | Wife | — | Texas |
| 3 | Doris F. Hooks | 13 | Daughter | — | Indiana |
| 4 | Edward C. Spencer | 26 | Head | Attendant | Illinois |
| 5 | Bertha A. Spencer | 23 | Wife | — | Illinois |
| 6 | Ronald D. Spencer | 2 | Son | — | Indiana |
| 7 | Gloria Jean Spencer | 1 | Daughter | — | Indiana |
| 8 | Charles A. Mcwayne | 82 | Head | — | New York |
| 9 | Kathrine Mcwayne | 76 | Wife | — | Germany |
| 10 | Arthur T. Rinne | 54 | Head | Cement Contractor | Indiana |
| 11 | Grace F. Rinne | 54 | Wife | — | Michigan |
| 12 | Ruth Rinne | 23 | Daughter | Housework | Indiana |
| 13 | Gladys Rinne | 19 | Daughter | Saleslady | Indiana |
| 14 | Samuel Rinne | 17 | Son | — | Indiana |
| 15 | Jennie Sturdevant | 83 | Mother-in-law | — | Maine |
| 16 | Pearl Sturdevant | 57 | Sister-in-law | Dressmaker | Michigan |
| 17 | Cecil R. Ervin | 35 | Head | Principal | Indiana |
| 18 | Iva Ervin | 37 | Wife | — | Indiana |
| 19 | Marilyn Ann Ervin | 5 | Daughter | — | Indiana |
| 20 | Sharon Rose Ervin | 3 | Daughter | — | Indiana |
| 21 | Clifford J. Fritz | 40 | Head | Machinist | Ohio |
| 22 | Edna B. Fritz | 34 | Wife | — | Indiana |
| 23 | Harvey G. Fritz | 16 | Son | Janitor Helper | Indiana |
| 24 | John H. Fritz THIS PERSON | 13 | Son | — | Indiana |
| 25 | Mary Lou Fritz | 10 | Daughter | — | Indiana |
| 26 | Joann Fritz | 8 | Daughter | — | Indiana |
| 27 | William P. Fritz | 5 | Son | — | Indiana |
| 28 | Delores Fritz | 3 | Daughter | — | Indiana |
| 29 | Barbara Ann Fritz | 1 | Daughter | — | Indiana |
| 30 | Lillian B. Fritz | 0 | Daughter | — | Indiana |
| 31 | Vernon N. Ross | 24 | Head | Machinist Apprentice | Indiana |
| 32 | Marion G. Ross | 22 | Wife | — | Illinois |
| 33 | Patricia J. Ross | 2 | Daughter | — | Indiana |
| 34 | Gertrude B. Burns | 50 | Head | — | Illinois |
| 35 | Alice Burns | 30 | Daughter | Waitress | Illinois |
| 36 | Anderson Burns | 23 | Son | Stamper | Indiana |
| 37 | Juanita Burns | 19 | Daughter | Housework | Indiana |
| 38 | Edward J. Rosenbauer | 24 | Roomer | Laborer | Indiana |
| 39 | Levi Brown | 67 | Head | Tool & Die Maker | Indiana |
| 40 | Lozier Lozier | 45 | Son | Plater | Indiana |
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)