WK
William Koch — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Monroe-County, New York
Our Model Tree links this William Koch across the 1930 and 1940 US Censuses in Monroe-County, New York (XGBoost, ~Confirmed) — first a head (b.~1861), then head of a 4-person household.
Age 79
b. ~1861
Male
Head
Born: Germany
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Monroe-County, New York |
| Surname | Koch |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 79 |
| Marital Status | Married |
| Birthplace | Germany |
| 1935 Residence (City) | Rochester |
| 1935 Residence (County) | Monroe |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth Country | Germany |
| Birthplace (normalized) | germany |
| Township / Ward | Rochester |
| Est. Birth Year | ~1861 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Koch | Head | — | 79 | ~1861 |
| Alice Koch | Daughter | — | 35 | ~1905 |
| Louise Koch | Spouse | — | 76 | ~1864 |
| Florence Koch | Daughter | — | 41 | ~1899 |
Census Appearances
1930
Monroe, New …
Head, age 69
Monroe, New York · implied b. ~1861 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Koch |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 69 |
| Marital Status | Married |
| Birthplace | Germany |
| Naturalization Status | Naturalized |
| Year of Immigration | 1883 |
| Age at First Marriage | 30 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Carpenter |
| Industry | Building Contractor |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | German |
| Home Owned/Rented | O |
| Home Value / Rent | 14000 |
| Radio Set | R |
| Birth Country | Germany |
| Birthplace (normalized) | germany |
1940
Monroe-County, New …
Head, age 79
Monroe-County, New York · implied b. ~1861 — 4 household members
| Surname | Koch |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 79 |
| Marital Status | Married |
| Birthplace | Germany |
| 1935 Residence (City) | Rochester |
| 1935 Residence (County) | Monroe |
| Naturalization Status | Naturalized |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth Country | Germany |
| Birthplace (normalized) | germany |
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 Koch across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
William Koch
Head · 1940 · age 79 · b. ~1861 · New York
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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 — Monroe-County, New York
Open full size
1940 US Federal Census — Monroe-County, New York
Page Contents
31 people indexed on this census page (nara:1940:m-t0627-02849-00021)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charlotte B. Ireland | 57 | Head | — | New York State |
| 2 | Windsor B. Ireland | 30 | Son | Laboratory Assistant | New York State |
| 3 | Elizabeth Carpenter | 67 | Sister in law | Practical Nurse | New York State |
| 4 | Kate Stolz | 76 | Head | — | Germany |
| 5 | George L. Deyo | 54 | Head | District Manager | New York State |
| 6 | Grace A. Deyo | 54 | Wife | — | New York State |
| 14 | Stella L. Kennedy | 55 | Head | — | New York State |
| 15 | William X. Kennedy | 24 | Son | Mechanical Engineer | New York State |
| 16 | Donald Kennedy | 20 | Son | — | New York State |
| 17 | Joseph Klotz | 67 | Head | Bartender | Germany |
| 18 | Ida M. Klotz | 57 | Wife | — | Germany |
| 19 | Florence Klotz | 33 | Daughter | Secretary | New York State |
| 20 | Julia Klotz | 23 | Daughter | Secretary | New York State |
| 21 | Ruth Klotz | 17 | Daughter | — | New York State |
| 22 | Eleanore Klotz | 15 | Daughter | — | New York State |
| 23 | Fred Andre | 31 | Son in law | Machinist | Germany |
| 24 | Mildred Andre | 27 | Daughter | — | New York State |
| 25 | Gail Ann Andre | 4 | Daughter | — | New York State |
| 26 | Bernette Burns | 52 | Head | Manager | Michigan |
| 27 | Luette B. Burns | 75 | Mother | — | Canada English |
| 28 | Gertrude Burns | 46 | Sister | Manager | Michigan |
| 29 | William Koch THIS PERSON | 79 | Head | — | Germany |
| 30 | Louise Koch | 76 | Wife | — | Germany |
| 31 | Florence Koch | 41 | Daughter | Bookkeeper | New York State |
| 32 | Alice Koch | 35 | Daughter | Teacher | New York State |
| 33 | William Vande Kalle | 71 | Head | Plumber | New York State |
| 34 | Maria S. Vande Kalle | 71 | Wife | — | New York State |
| 35 | Sarah Kooman | 74 | Lodger | — | New York State |
| 36 | Laura Seeweld | 22 | Lodger | — | New York State |
| 37 | Harriet Agate | 50 | Head | — | New York State |
| 38 | Margaret Ann Snyder | 44 | Cousin | — | New York State |
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)