JK
John Koch — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Bremer, Iowa
Our Model Tree links this John Koch across the 1920 and 1930 US Censuses in Bremer, Iowa (XGBoost, ~Confirmed) — first a head (b.~1878), then head of a 5-person household.
Age 42
b. ~1878
Male
Head
Born: Iowa
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | Bremer, Iowa |
| Surname | Koch |
| Given Name | John C |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Additional Details | |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | Emp |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Fremont Township |
| Est. Birth Year | ~1878 |
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.
5 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Paulina Koch | Spouse | — | 37 | ~1883 |
| Elsa Koch | Daughter | — | 4 | ~1916 |
| Rudolph Koch | Son | — | 10 | ~1910 |
| John Koch | Head | — | 42 | ~1878 |
| Hulda Koch | Daughter | — | 6 | ~1914 |
Census Appearances
1920
Bremer, Iowa
Head, age 42
Bremer, Iowa · implied b. ~1878 — 5 household members
| Surname | Koch |
| Given Name | John C |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | Emp |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Bremer, Iowa
Other, age 52
Bremer, Iowa · implied b. ~1878 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Koch |
| Given Name | John C. |
| Relationship to Head | O |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 23 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Radio Set | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Koch across 2 US Census years (1920 and 1930) in Bremer, Iowa, using XGBoost record linkage.
Show:
This person
Anchor record
John Koch
Head · 1920 · age 42 · b. ~1878 · Iowa
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Bremer, Iowa
Open full size
1920 US Federal Census — Bremer, Iowa
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu479unit:0740)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Fred Lohmann | 48 | Head | Farmer | Iowa |
| 52 | Almina Lohmann | 47 | Wife | — | Germany |
| 53 | Adelfa Lohmann | 18 | Daughter | — | Iowa |
| 54 | Adeline Lohmann | 12 | Daughter | — | Iowa |
| 55 | Ester Lohmann | 8 | Daughter | — | Iowa |
| 56 | Louis Maahs | 25 | Hired man | Farmer | Germany |
| 57 | William Kanning | 33 | Head | Farmer | Iowa |
| 58 | Mary Kanning | 34 | Wife | — | Iowa |
| 59 | Walbert Kanning | 11 | Son | — | Iowa |
| 60 | Louis Kanning | 8 | Son | — | Iowa |
| 61 | Raymond Kanning | 5 | Son | — | Iowa |
| 62 | William Kanning | 2 | Son | — | Iowa |
| 63 | Alvin Kanning | 0 | Son | — | Iowa |
| 64 | John C Koch THIS PERSON | 42 | Head | Farmer | Iowa |
| 65 | Paulina Koch | 37 | Wife | — | Germany |
| 66 | Rudolph Koch | 10 | Son | — | Iowa |
| 67 | Hulda Koch | 6 | Daughter | — | Iowa |
| 68 | Elsa Koch | 4 | Daughter | — | Iowa |
| 69 | Herman Zeptmeier | 42 | Head | Farmer | Iowa |
| 70 | Emma Zeptmeier | 32 | Wife | — | Iowa |
| 71 | Edward Zeptmeier | 10 | Son | — | Iowa |
| 72 | Rosina Zeptmeier | 5 | Daughter | — | Iowa |
| 73 | Carl Kinnemiller | 47 | Head | Farmer | Iowa |
| 74 | Mary Kinnemiller | 39 | Wife | — | Iowa |
| 75 | Albert Kinnemiller | 17 | Son | Farm Laborer | Iowa |
| 76 | August Kinnemiller | 15 | Son | Farm Laborer | Iowa |
| 77 | Carl Behrens | 34 | Head | Farmer | Iowa |
| 78 | Amanda Behrens | 30 | Wife | — | Iowa |
| 79 | William Behrens | 37 | Head | Farmer | Iowa |
| 80 | Carrie Behrens | 34 | Wife | — | Iowa |
| 81 | Esther Behrens | 10 | Daughter | — | Iowa |
| 82 | Caroline Beisner | 42 | Head | Farmer | Germany |
| 83 | Herman Beisner | 20 | Son | Farm Laborer | Iowa |
| 84 | Walter Beisner | 17 | Son | Farm Laborer | Iowa |
| 85 | Herman Fellswandt | 48 | Head | Farmer | Iowa |
| 86 | Augusta Fellswandt | 47 | Wife | — | Germany |
| 87 | Leo Fellswandt | 15 | Son | Farm Laborer | Iowa |
| 88 | Luella Fellswandt | 7 | Daughter | — | Iowa |
| 89 | Margaret Hahn | 59 | Head | Farmer | Germany |
| 90 | Louis Hahn | 30 | Son | Farm Laborer | Iowa |
| 91 | Arthur Hahn | 18 | Son | Farm Laborer | Iowa |
| 92 | Esther Hahn | 16 | Daughter | — | Iowa |
| 93 | William Lohmann | 49 | Head | Farmer | Iowa |
| 94 | Wanda Lohmann | 34 | Wife | — | Iowa |
| 95 | Walter Lohmann | 13 | Son | — | Iowa |
| 96 | Edwin Lohmann | 10 | Son | — | Iowa |
| 97 | Leslie Lohmann | 7 | Son | — | Iowa |
| 98 | Lucine Lohmann | 1 | Daughter | — | Iowa |
| 99 | Ludwig Lohmann | 82 | Father | — | Germany |
| 100 | William Reese | 37 | Head | Farmer | 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)