JK
John Klein — 1940 US Census Record
Model Tree available1940 United States Federal Census · Sioux-County, Iowa
Our Model Tree links this John Klein across the 1920, 1930 and 1940 US Censuses in Sioux-County, Iowa (XGBoost, ~Confirmed), with identified parents William & Elizabeth — first a head (b.~1900), then head of a 10-person household.
Age 40
b. ~1900
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Sioux-County, Iowa |
| Surname | Klein |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Lynn Twp |
| 1935 Residence (County) | Sioux |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | E |
| Hours Worked | 95 |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Farmer |
| Township / Ward | Lynn Twp |
| Est. Birth Year | ~1900 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Ambrose Schwebach | Other | — | 22 | ~1918 |
| John Klein | Head | — | 40 | ~1900 |
| Bernadette Klein | Spouse | — | 35 | ~1905 |
| Harold Klein | Son | — | 4 | ~1936 |
| Bernice Klein | Daughter | — | 1 | ~1939 |
| Eleanora Klein | Daughter | — | 3 | ~1937 |
| Josephine Klein | Daughter | — | 6 | ~1934 |
| Marie Klein | Daughter | — | 2 | ~1938 |
| Dorothy Nickel | Other | — | 17 | ~1923 |
| Margie Klein | Daughter | — | ~1940 |
Census Appearances
1920
Sioux, Iowa
Son, age 20
Sioux, Iowa · implied b. ~1900 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Klein |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Farm Labor |
| Industry | Home |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Sioux, Iowa
Son, age 30
Sioux, Iowa · implied b. ~1900 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Klein |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Laborer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Sioux-County, Iowa
Head, age 40
Sioux-County, Iowa · implied b. ~1900 — 10 household members
| Surname | Klein |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Lynn Twp |
| 1935 Residence (County) | Sioux |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | E |
| Hours Worked | 95 |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| 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 (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Klein (~0.92 confidence) and mother Elizabeth Klein (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Klein
b. ~1864
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Klein
b. ~1873
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Klein
Head · 1940 · age 40 · b. ~1900 · Iowa
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Sioux-County, Iowa
Open full size
1940 US Federal Census — Sioux-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01205-00418)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Aloysius Hoffmann | 44 | Head | Farmer | United States |
| 2 | Alice Hoffmann | 37 | Wife | Housewife | United States |
| 3 | Bernice Hoffmann | 11 | Daughter | — | United States |
| 4 | Alice Hoffmann | 9 | Daughter | — | United States |
| 5 | Viola Hoffmann | 8 | Daughter | — | United States |
| 6 | Wilfred Hoffmann | 6 | Son | — | United States |
| 7 | Gerald Hoffmann | 4 | Son | — | United States |
| 8 | Marilyn Hoffmann | 2 | Son | — | United States |
| 9 | Robert Hoffmann | 0 | Son | — | United States |
| 10 | Loren Grady | 27 | Hire man | Hire Man | United States |
| 11 | Henry J. Klein | 38 | Head | Farmer | Iowa |
| 12 | Julia G. Klein | 34 | Wife | Housewife | Iowa |
| 13 | Paul A. Klein | 7 | Son | — | Iowa |
| 14 | Dorothea M. Klein | 6 | Daughter | — | Iowa |
| 15 | George W. Klein | 2 | Son | — | Iowa |
| 16 | Emma Buettel | 36 | House girl | House Girl | Iowa |
| 17 | Leo Georgen | 24 | Hire man | Farm Laborer | Iowa |
| 18 | John Klein THIS PERSON | 40 | Head | Farmer | Illinois |
| 19 | Bernadette Klein | 35 | Wife | — | Iowa |
| 20 | Josephine Klein | 6 | Daughter | — | Iowa |
| 21 | Harold Klein | 4 | Son | — | Iowa |
| 22 | Eleanora Klein | 3 | Daughter | — | Iowa |
| 23 | Marie Klein | 2 | Daughter | — | Iowa |
| 24 | Bernice Klein | 1 | Daughter | — | Iowa |
| 25 | Margie Klein | 0 | Daughter | — | Iowa |
| 26 | Ambrose Schwebach | 22 | Hire man | Farm Laborer | Iowa |
| 27 | Dorothy Nickel | 17 | House girl | House Girl | Iowa |
| 28 | Gerrit A. Roos | 53 | Head | Farmer | Iowa |
| 29 | Hattie B. Roos | 49 | Wife | Housewife | Iowa |
| 30 | Janet Roos | 31 | Daughter | Hire Girl | Iowa |
| 31 | Jasmine Roos | 20 | Daughter | — | Iowa |
| 32 | James Roos | 19 | Son | — | Iowa |
| 33 | John Roos | 17 | Son | Farm Laborer | Iowa |
| 34 | Esther Roos | 15 | Daughter | — | Iowa |
| 35 | Cornie J. Daastra | 29 | Head | Farmer | Iowa |
| 36 | Bertha Daastra | 26 | Wife | — | Iowa |
| 37 | Bernet Daastra | 3 | Daughter | — | Iowa |
| 38 | Dickson Daastra | 0 | Son | — | Iowa |
| 39 | Raymond Iliemit | 18 | Hire man | Farm Laborer | Iowa |
| 40 | Henry A. Hellwege | 42 | Head | Farmer | Germany |
Related Census Records
Pedigree Summary
John
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)