JK
John Klein — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Black Hawk, Iowa
Our Model Tree links this John Klein across the 1910, 1920 and 1930 US Censuses in Black Hawk, Iowa (XGBoost, ~Confirmed) — first a head (b.~1870), then head of a 4-person household.
Age 60
b. ~1870
Male
Head
Born: Illinois
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Black Hawk, Iowa |
| Surname | Klein |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 21 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Additional Details | |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 4000 |
| Radio Set | R |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Gilbertville Town |
| Est. Birth Year | ~1870 |
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 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Klein | Head | — | 60 | ~1870 |
| Eugene Klein | Son | — | 13 | ~1917 |
| Anna Klein | Spouse | — | 56 | ~1874 |
| Mathilda Klein | Daughter | — | 16 | ~1914 |
Census Appearances
1910
Black Hawk, …
Head, age 40
Black Hawk, Iowa · implied b. ~1870 — 15 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Klein |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Illinois |
| Years Married | 12 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Farmer |
| Industry | General Farm |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
Black Hawk, …
Head, age 50
Black Hawk, Iowa · implied b. ~1870 — 13 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Klein |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | Em |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Black Hawk, …
Head, age 60
Black Hawk, Iowa · implied b. ~1870 — 4 household members
| Surname | Klein |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 21 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 4000 |
| Radio Set | R |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Klein across 3 US Census years (1910, 1920 and 1930) in Black Hawk, Iowa, using XGBoost record linkage.
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This person
Anchor record
John Klein
Head · 1930 · age 60 · b. ~1870 · Iowa
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Black Hawk, Iowa
Open full size
1930 US Federal Census — Black Hawk, Iowa
Page Contents
41 people indexed on this census page (ia:1930:iowacensus00reel642:0394)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Marie Schare | 12 | Daughter | — | Iowa |
| 2 | William Michel | 54 | Head | Laborer | Iowa |
| 3 | Mary A. Michel | 56 | Wife | — | Iowa |
| 4 | Harold Umphy | 15 | Lodger | — | Iowa |
| 5 | Elizabeth Frost | 46 | Sister-in-law | — | Iowa |
| 6 | William M. Schares | 67 | Head | Proprietor | Germany |
| 7 | Anna M. Schares | 60 | Wife | — | Iowa |
| 8 | Peter Schommer | 78 | Head | — | Germany |
| 9 | Wife Schommer | 72 | Wife | — | Germany |
| 10 | Nicholas Huberty | 58 | Head | — | Iowa |
| 11 | Magdalen Huberty | 52 | Wife | — | Iowa |
| 12 | Catherine Schmit | 81 | Head | — | Germany |
| 13 | Mary M. Federspiel | 58 | Daughter | — | Iowa |
| 14 | Susan Mangrich | 74 | Head | — | Iowa |
| 15 | John Klein THIS PERSON | 60 | Head | — | Illinois |
| 16 | Anna Klein | 56 | Wife | — | Illinois |
| 17 | Mathilda Klein | 16 | Daughter | — | Iowa |
| 18 | Eugene J. Klein | 13 | Son | — | Iowa |
| 19 | John C. Kemp | 64 | Head | Bookkeeper | Luxemburg |
| 20 | John Frost | 80 | Head | — | Germany |
| 21 | Mary A. Frost | 72 | Wife | — | Germany |
| 22 | Mathias B. Frost | 76 | Head | — | Germany |
| 23 | M. Battista Farmer | 41 | Sister | Teacher | Minnesota |
| 24 | M. Clement Kreyer | 27 | Sister | Teacher | Minnesota |
| 25 | M. Fiona Frank | 23 | Sister | Teacher | North Dakota |
| 26 | M. Angeline Vonderhaar | 27 | Sister | Teacher | Minnesota |
| 27 | M. Lorenza Hartman | 29 | Sister | Servant | Russia |
| 28 | Frank Etringer | 38 | Head | Proprietor | Iowa |
| 29 | Anna E. Etringer | 31 | Wife | — | Iowa |
| 30 | Peter J. Etringer | 11 | Son | — | Iowa |
| 31 | Viola A. Etringer | 9 | Daughter | — | Iowa |
| 32 | Marie M. Etringer | 7 | Daughter | — | Iowa |
| 33 | Francis M. Etringer | 4 | Son | — | Iowa |
| 34 | Jerome J. Etringer | 2 | Son | — | Iowa |
| 35 | Gertrude E. Welter | 17 | Daughter | Servant | Iowa |
| 36 | Frank J. Grants | 52 | Head | Laborer | Minnesota |
| 37 | Margaret M. Grants | 52 | Wife | — | Iowa |
| 38 | John J. Grants | 24 | Son | Carpenter | Iowa |
| 39 | Lloyd W. Mcdonald | 24 | Head | Laborer | Iowa |
| 40 | Florence Mcdonald | 27 | Wife | — | Iowa |
| 41 | Joann E. Mcdonald | 2 | Daughter | — | Illinois |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)