JF
John Fritz — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Madison-County, Illinois
Our Model Tree links this John Fritz across the 1930 and 1940 US Censuses in Madison-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1924), then head of a 7-person household.
Age 16
b. ~1924
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Madison-County, Illinois |
| Surname | Fritz |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Alton City |
| 1935 Residence (County) | Madison |
| Additional Details | |
| Highest Grade | Hs 2 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Alton City |
| Est. Birth Year | ~1924 |
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 |
|---|---|---|---|---|
| Charles Fritz | Son | — | 19 | ~1921 |
| John Fritz | Son | — | 16 | ~1924 |
| Charles Fritz | Head | — | 45 | ~1895 |
| Patricia Fritz | Daughter | — | 8 | ~1932 |
| Mary Fritz | Daughter | — | 12 | ~1928 |
| Helen Fritz | Daughter | — | 21 | ~1919 |
| Mary Fritz | Spouse | — | 47 | ~1893 |
Census Appearances
1930
Madison, Illinois
Son, age 6
Madison, Illinois · implied b. ~1924 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fritz |
| Given Name | John R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Madison-County, Illinois
Son, age 16
Madison-County, Illinois · implied b. ~1924 — 7 household members
| Surname | Fritz |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Alton City |
| 1935 Residence (County) | Madison |
| Highest Grade | Hs 2 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 16 · b. ~1924 · Illinois
★ You are viewing this record
Sibling
Mary Fritz
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Fritz
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Fritz
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Fritz
Sibling · 1940 · age 8
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 — Madison-County, Illinois
Open full size
1940 US Federal Census — Madison-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00848-00567)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Marietta Bagley | 19 | Daughter | — | Illinois |
| 42 | Forrest Combs | 30 | Head | Stillman Helper | Illinois |
| 43 | Phyllis Combs | 28 | Wife | — | Pennsylvania |
| 44 | Mary Hutchins | 56 | Mother Law | — | Illinois |
| 45 | Melvin Conner | 29 | Head | Labor Machine Adjuster | Illinois |
| 46 | Henrietta Conner | 28 | Wife | Machine Operator | Illinois |
| 47 | Cecil Tishauer | 22 | Head | Packer Glass | Illinois |
| 48 | Dora Tishauer | 20 | Wife | — | Illinois |
| 49 | John Trianatoglos | 55 | Head | Candy Mfg | Greece |
| 50 | Elizabeth Trianatoglos | 45 | Wife | — | Greece |
| 51 | Helen Trianatoglos | 19 | Daughter | — | Illinois |
| 52 | Pauline Thamitgos | 79 | Mother Law | — | Greece |
| 53 | Leonard Thareats | 47 | Head | Pipe Fitter | Germany |
| 54 | Emily Thareats | 46 | Wife | — | Illinois |
| 55 | Helen Thareats | 15 | Daughter | — | Illinois |
| 56 | Noval Mitchell | 37 | Head | Stillman | Illinois |
| 57 | Charlotte Mitchell | 23 | Wife | — | Illinois |
| 58 | Clinton Fowler | 27 | Head | Owner | Missouri |
| 59 | Edna Fowler | 27 | Wife | — | Illinois |
| 60 | Dee Ann Fowler | 1 | Daughter | — | Illinois |
| 61 | Ezra Poppins | 55 | Head | Labor | Illinois |
| 62 | Ezra Poppins | 54 | Wife | — | Illinois |
| 63 | Alphonse Joyce | 44 | Head | Labor | Indiana |
| 64 | Ruth Joyce | 42 | Wife | — | Illinois |
| 65 | Leon Joyce | 16 | Son | — | Illinois |
| 66 | Betty Joyce | 14 | Daughter | — | Illinois |
| 67 | Ruth Joyce | 10 | Daughter | — | Illinois |
| 68 | Marjorie Joyce | 8 | Daughter | — | Illinois |
| 69 | Lois Joyce | 11 | Daughter | — | Illinois |
| 70 | Alfreda Joyce | 4 | Daughter | — | Illinois |
| 71 | Velma Babb | 16 | Step Daughter | Housekeeper | Illinois |
| 72 | Vernon Babb | 14 | Step Son | — | Missouri |
| 73 | Charles Fritz | 45 | Head | Labor | Illinois |
| 74 | Mary Fritz | 47 | Wife | — | Illinois |
| 75 | Helen Fritz | 21 | Daughter | Packer | Illinois |
| 76 | Charles Fritz | 19 | Son | — | Illinois |
| 77 | John Fritz THIS PERSON | 16 | Son | — | Illinois |
| 78 | Mary Fritz | 12 | Daughter | — | Illinois |
| 79 | Patricia Fritz | 8 | Daughter | — | Illinois |
| 80 | Agnes Taylor | 31 | Head | — | Illinois |
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)