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William Fischer — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Kentucky
Our Model Tree links this William Fischer across the 1930 and 1940 US Censuses in Jefferson-County, Kentucky (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 7-person household.
Age 19
b. ~1921
Male
Son
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kentucky |
| Surname | Fischer |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Township / Ward | Louisville City |
| Est. Birth Year | ~1921 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Lucille Fischer | Spouse | — | 25 | ~1915 |
| Edna Fischer | Daughter | — | 2 | ~1938 |
| Ethel Fischer | Daughter | — | 14 | ~1926 |
| Robert Fischer | Son | — | 17 | ~1923 |
| William Fischer | Head | — | 44 | ~1896 |
| Vivian Fischer | Daughter | — | 11 | ~1929 |
| William Fischer | Son | — | 19 | ~1921 |
Census Appearances
1930
Jefferson, Kentucky
Son, age 9
Jefferson, Kentucky · implied b. ~1921 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fischer |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Jefferson-County, Kentucky
Son, age 19
Jefferson-County, Kentucky · implied b. ~1921 — 7 household members
| Surname | Fischer |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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 William Fischer across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Fischer
Son · 1940 · age 19 · b. ~1921 · Kentucky
★ You are viewing this record
Sibling
Edna Fischer
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ethel Fischer
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Fischer
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vivian Fischer
Sibling · 1940 · age 11
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 — Jefferson-County, Kentucky
Open full size
1940 US Federal Census — Jefferson-County, Kentucky
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01369-00550)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Neal | 16 | Son | — | Tennessee |
| 2 | Jean Neal | 14 | Daughter | — | Kentucky |
| 3 | William E. Carlin | 29 | Son-in-law | Boiler-Maker Helper | Kentucky |
| 4 | Mary Carlin | 26 | Daughter | — | Kentucky |
| 5 | James Carlin | 3 | Grandson | — | Kentucky |
| 6 | Edward C. Sewell | 56 | Head | Blacksmith Helper | Kentucky |
| 7 | Alice Sewell | 49 | Wife | Inspector | Kentucky |
| 8 | Lillian Fulkerson | 26 | Daughter | — | Kentucky |
| 9 | William H. Fulkerson | 2 | Grandson | — | Kentucky |
| 10 | Edward Rountree | 30 | Head | Blacksmith | Kentucky |
| 11 | Mildred Rountree | 24 | Wife | — | Kentucky |
| 12 | James O. Newman | 55 | Head | Boilermaker | Alabama |
| 13 | Eva Newman | 54 | Wife | — | Alabama |
| 14 | James William Newman | 18 | Son | New Worker | Alabama |
| 15 | Joseph Louis Newman | 17 | Son | Body Man | Alabama |
| 16 | Isabel Mae Newman | 15 | Daughter | — | Alabama |
| 17 | William C. Fischer | 44 | Head | Laborer | Kentucky |
| 18 | Lucille Fischer | 25 | Wife | — | Kentucky |
| 19 | William Fischer THIS PERSON | 19 | Son | — | Kentucky |
| 20 | Robert Fischer | 17 | Son | — | Kentucky |
| 21 | Ethel Fischer | 14 | Daughter | — | Kentucky |
| 22 | Vivian Fischer | 11 | Daughter | — | Kentucky |
| 23 | Edna Fischer | 2 | Daughter | — | Kentucky |
| 25 | Robert Creeden | 70 | Head | Passenger Conductor | Kentucky |
| 26 | Louise Creeden | 68 | Wife | — | Kentucky |
| 27 | John Michael Brenzel | 48 | Head | Office Clerk | Kentucky |
| 28 | Lorena Brenzel | 42 | Wife | — | Kentucky |
| 29 | Helen Louise Brenzel | 19 | Daughter | — | Kentucky |
| 30 | John Charles Brenzel | 17 | Son | — | Kentucky |
| 31 | Mary Margaret Brenzel | 14 | Daughter | — | Kentucky |
| 32 | Herbert S. Hensel | 48 | Head | Assembler | Kentucky |
| 33 | Beulah M. Hensel | 46 | Wife | — | Kentucky |
| 34 | Herbert Jr. Hensel | 20 | Son | New Worker | Kentucky |
| 35 | Helen Marie Hensel | 18 | Daughter | — | Kentucky |
| 36 | Marjorie Hensel | 15 | Daughter | — | Kentucky |
| 37 | Charles Edwin Hensel | 13 | Son | — | Kentucky |
| 38 | Thomas Lucas | 52 | Head | Car Inspector | Tennessee |
| 39 | Beatrice Lucas | 50 | Wife | — | Tennessee |
| 40 | Carl Lucas | 17 | Son | — | Tennessee |
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)