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William Koch — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Cedar, Iowa
Our Model Tree links this William Koch across the 1900, 1910 and 1920 US Censuses in Cedar, Iowa (XGBoost, ~Confirmed) — first a head (b.~1873), then head of a 9-person household.
Age 47
b. ~1873
Male
Head
Born: Germany
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | Cedar, Iowa |
| Surname | Koch |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Germany |
| Year of Immigration | 1894 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Additional Details | |
| Occupation | Farmer |
| Industry | General |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | German |
| Home Owned/Rented | R |
| Birth Country | Germany |
| Birthplace (normalized) | germany |
| Occupation | Farmer |
| Township / Ward | Fremont Township |
| Est. Birth Year | ~1873 |
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 1920 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Alma Koch | Daughter | — | 16 | ~1904 |
| Sophia Koch | Spouse | — | 52 | ~1868 |
| Edward Koch | Son | — | 18 | ~1902 |
| Freida Koch | Daughter | — | 20 | ~1900 |
| Dorothy Koch | Daughter | — | 10 | ~1910 |
| Albert Koch | Son | — | 12 | ~1908 |
| Irene Koch | Daughter | — | 15 | ~1905 |
| Wilhelmina Koch | Daughter | — | 7 | ~1913 |
| William Koch | Head | — | 47 | ~1873 |
Census Appearances
1900
Cedar, Iowa
Head, age 29
Cedar, Iowa · implied b. ~1871 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Koch |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Germany |
| Birth Month | Aug |
| Birth Year | 1871 |
| Year of Immigration | 1888 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Farmer |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Germany |
| Birthplace (normalized) | germany |
1910
Cedar, Iowa
Head, age 37
Cedar, Iowa · implied b. ~1873 — 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 | 37 |
| Marital Status | Married |
| Birthplace | Germany |
| Years Married | 16 |
| Year of Immigration | 1884 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Farmer |
| Industry | General Farm |
| Birth Country | Germany |
| Birthplace (normalized) | germany |
1920
Cedar, Iowa
Head, age 47
Cedar, Iowa · implied b. ~1873 — 9 household members
| Surname | Koch |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Germany |
| Year of Immigration | 1894 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Farmer |
| Industry | General |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | German |
| Home Owned/Rented | R |
| 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 3 US Census years (1900, 1910 and 1920) in Cedar, Iowa, using XGBoost record linkage.
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This person
Anchor record
William Koch
Head · 1920 · age 47 · b. ~1873 · Iowa
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Cedar, Iowa
Open full size
1920 US Federal Census — Cedar, Iowa
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu482unit:0791)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | William E Matherns | 42 | Head | Farmer | W. Virginia |
| 52 | Elizabeth Matherns | 41 | Wife | — | Ohio |
| 53 | Clarence Matherns | 11 | Son | — | Illinois |
| 54 | Pearl Matherns | 9 | Daughter | — | Illinois |
| 55 | Hazel Matherns | 7 | Daughter | — | Illinois |
| 56 | William S Ferguson | 56 | Head | Farmer | Iowa |
| 57 | Anna Ferguson | 51 | Wife | — | Iowa |
| 58 | Claud Ferguson | 31 | Son | — | Iowa |
| 59 | Lawrence Ferguson | 15 | Son | — | Iowa |
| 60 | Albert H Waffit | 48 | Head | Farmer | Iowa |
| 61 | Grace Waffit | 47 | Wife | — | Iowa |
| 62 | E. W. Brown | 23 | Hired man | Laborer | Missouri |
| 63 | Glenn Jones | 31 | Head | Farmer | Iowa |
| 64 | Elfa Jones | 30 | Wife | — | Iowa |
| 65 | Kenneth Jones | 10 | Son | — | Iowa |
| 66 | Carl Lehrman | 29 | Head | Farmer | Iowa |
| 67 | Minnie Lehrman | 29 | Wife | — | Germany |
| 68 | Alice Lehrman | 6 | Daughter | — | Iowa |
| 69 | Dorothy Lehrman | 4 | Daughter | — | Iowa |
| 70 | Earl Hodgkins | 26 | Head | Farmer | Indiana |
| 71 | Violet L Hodgkins | 22 | Wife | — | Iowa |
| 72 | Minnie M Hodgkins | 1 | Daughter | — | Iowa |
| 73 | Leroy Deere | 10 | Nephew | — | Iowa |
| 74 | Paul Lehrman | 28 | Head | Farmer | Iowa |
| 75 | Ida Lehrman | 28 | Wife | — | Iowa |
| 76 | Herbert L Lehrman | 6 | Son | — | Iowa |
| 77 | Alma Lehrman | 4 | Daughter | — | Iowa |
| 78 | Louisa Lehrman | 2 | Daughter | — | Iowa |
| 79 | Helen Lehrman | 0 | Daughter | — | Iowa |
| 80 | Gertie Walford | 26 | Maid | Maid | Iowa |
| 81 | Fred Schloemer | 47 | Head | Laborer | Germany |
| 82 | Dora Schloemer | 42 | Wife | — | Iowa |
| 83 | Velma Schloemer | 13 | Daughter | — | Germany |
| 84 | Edward Schloemer | 9 | Son | — | Germany |
| 85 | Hilda Schloemer | 6 | Daughter | — | Iowa |
| 86 | William Koch THIS PERSON | 47 | Head | Farmer | Germany |
| 87 | Sophia Koch | 52 | Wife | — | Germany |
| 88 | Freida Koch | 20 | Daughter | — | Iowa |
| 89 | Edward Koch | 18 | Son | — | Iowa |
| 90 | Alma Koch | 16 | Daughter | — | Iowa |
| 91 | Irene Koch | 15 | Daughter | — | Iowa |
| 92 | Albert Koch | 12 | Son | — | Iowa |
| 93 | Dorothy Koch | 10 | Daughter | — | Iowa |
| 94 | Wilhelmina Koch | 7 | Daughter | — | Iowa |
| 95 | Ralph Robinson | 33 | Head | Farmer | Iowa |
| 96 | Eunice Robinson | 34 | Wife | — | Iowa |
| 97 | Dorothy Robinson | 11 | Daughter | — | Iowa |
| 98 | Kenneth Robinson | 9 | Son | — | Iowa |
| 99 | Margaret Robinson | 5 | Daughter | — | Iowa |
| 100 | Ruth Robinson | 3 | Daughter | — | Iowa |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)