WK
William Koch — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Nemaha-County, Kansas
Our Model Tree links this William Koch across the 1930 and 1940 US Censuses in Nemaha-County, Kansas (XGBoost, ~Confirmed) — first a head (b.~1894), then head of a 9-person household.
Age 46
b. ~1894
Male
Head
Born: Kansas
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Nemaha-County, Kansas |
| Surname | Koch |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Kansas |
| 1935 Residence (City) | Center Township |
| 1935 Residence (County) | Nemaha |
| Additional Details | |
| Occupation | Farmer |
| Industry | farming |
| Class of Worker | OA |
| Hours Worked | 52 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Occupation | Farmer |
| Township / Ward | Center Township |
| Est. Birth Year | ~1894 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Gerald Koch | Son | — | 8 | ~1932 |
| Velma Koch | Daughter | — | 6 | ~1934 |
| Clementine Koch | Spouse | — | 46 | ~1894 |
| William Koch | Head | — | 46 | ~1894 |
| Mary Koch | Daughter | — | 3 | ~1937 |
| Earl Koch | Son | — | 12 | ~1928 |
| Maxine Koch | Daughter | — | 16 | ~1924 |
| Gilbert Koch | Son | — | 14 | ~1926 |
| Leona Koch | Daughter | — | 10 | ~1930 |
Census Appearances
1930
Nemaha, Kansas
Head, age 36
Nemaha, Kansas · implied b. ~1894 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Koch |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Kansas |
| Age at First Marriage | 21 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Bohemia |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Nemaha-County, Kansas
Head, age 46
Nemaha-County, Kansas · implied b. ~1894 — 9 household members
| Surname | Koch |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Kansas |
| 1935 Residence (City) | Center Township |
| 1935 Residence (County) | Nemaha |
| Occupation | Farmer |
| Industry | farming |
| Class of Worker | OA |
| Hours Worked | 52 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
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.
Show:
This person
Anchor record
William Koch
Head · 1940 · age 46 · b. ~1894 · Kansas
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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 — Nemaha-County, Kansas
Open full size
1940 US Federal Census — Nemaha-County, Kansas
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01248-00482)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Otto R Schmidt | 49 | Head | Farmer | Kansas |
| 42 | Ellen W Schmidt | 44 | Wife | — | Pennsylvania |
| 43 | William Koch THIS PERSON | 46 | Head | Farmer | Kansas |
| 44 | Clementine Koch | 46 | Wife | — | Kansas |
| 45 | Maxine C Koch | 16 | Daughter | — | Kansas |
| 46 | Gilbert E Koch | 14 | Son | — | Kansas |
| 47 | Earl R Koch | 12 | Son | — | Kansas |
| 48 | Leona M Koch | 10 | Daughter | — | Kansas |
| 49 | Gerald L Koch | 8 | Son | — | Kansas |
| 50 | Velma M Koch | 6 | Daughter | — | Kansas |
| 51 | Mary A Koch | 3 | Daughter | — | Kansas |
| 52 | Joseph S Toby | 65 | Head | — | Indiana |
| 53 | Margaret A Toby | 45 | Wife | — | Indiana |
| 54 | Eugene L Toby | 27 | Son | Auctioneer | Nebraska |
| 55 | Minnie M Heinkele | 50 | Head | — | Kansas |
| 56 | Paul L Heinkele | 23 | Son | Farmer | Kansas |
| 57 | Lucile M Heinkele | 18 | Daughter | — | Kansas |
| 58 | Paul B Cross | 44 | Head | Farmer | Missouri |
| 59 | Donna S Cross | 39 | Wife | — | Kansas |
| 60 | Maggie M Roeder | 62 | Head | — | Iowa |
| 61 | Charles A Roeder | 37 | Son | Farmer | Iowa |
| 62 | Simon A Roeder | 31 | Son | Farmer | Iowa |
| 63 | Gilbert J Roeder | 22 | Son | Farmer | Kansas |
| 64 | Leroy H Thompson | 46 | Head | Farmer | Ohio |
| 65 | Maude E Thompson | 37 | Wife | — | Illinois |
| 66 | Samuel A Mandeville | 50 | Hired Hand | Farmer | Nebraska |
| 67 | Phillip W Heinen | 65 | Head | Farmer | Nebraska |
| 68 | Edith A Heinen | 58 | Wife | — | Kansas |
| 69 | Thomas G Kean | 53 | Head | Farmer | Nebraska |
| 70 | Gerald D Kean | 13 | Son | — | Kansas |
| 71 | Kathleen M Kean | 11 | Daughter | — | Kansas |
| 72 | Bernice M Kean | 9 | Daughter | — | Kansas |
| 73 | Sarah E Kean | 6 | Daughter | — | Kansas |
| 74 | Thomas G Jr Kean | 4 | Son | — | Kansas |
| 75 | Larry Kean | 2 | Son | — | Kansas |
| 76 | Henry J Budenbauch | 46 | Head | Farmer | Kansas |
| 77 | Maude Budenbauch | 41 | Wife | — | Missouri |
| 78 | Gilbert Budenbauch | 20 | Son | Farmer | Kansas |
| 79 | Rosalie Budenbauch | 18 | Daughter | — | Kansas |
| 80 | Cecilia Budenbauch | 16 | Daughter | — | Kansas |
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)