JB
John Blake — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cherokee-County, Iowa
Our Model Tree links this John Blake across the 1900, 1910, 1920, 1930 and 1940 US Censuses in Cherokee-County, Iowa (XGBoost, ~Confirmed), with identified parents Effie & Fred — first a head (b.~1894), then head of a 6-person household.
Age 46
b. ~1894
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cherokee-County, Iowa |
| Surname | Blake |
| Given Name | John D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Afton Twp |
| 1935 Residence (County) | Cherokee |
| Additional Details | |
| Occupation | Farmer |
| Industry | OA |
| Class of Worker | 0 |
| Hours Worked | 48 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Afton Twp |
| 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Blake | Head | — | 46 | ~1894 |
| Rolon Blake | Son | — | 14 | ~1926 |
| Agness Blake | Spouse | — | 40 | ~1900 |
| Muriel Blake | Daughter | — | 18 | ~1922 |
| Donald Blake | Son | — | 8 | ~1932 |
| Russell Blake | Son | — | 12 | ~1928 |
Census Appearances
1900
Cherokee, Iowa
Son, age 7
Cherokee, Iowa · implied b. ~1893 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blake |
| Given Name | Johnie D |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Iowa |
| Birth Month | Sept |
| Birth Year | 1893 |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | Wisconsin |
| Can Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1910
Cherokee, Iowa
Son, age 16
Cherokee, Iowa · implied b. ~1894 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blake |
| Given Name | John D |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | Wisconsin |
| Occupation | Farm Laborer |
| Industry | Home Farm |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1920
Cherokee, Iowa
Head, age 26
Cherokee, Iowa · implied b. ~1894 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blake |
| Given Name | John D |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | Wisconsin |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Cherokee, Iowa
Head, age 36
Cherokee, Iowa · implied b. ~1894 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blake |
| Given Name | John D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 24 |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | Wisconsin |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Cherokee-County, Iowa
Head, age 46
Cherokee-County, Iowa · implied b. ~1894 — 6 household members
| Surname | Blake |
| Given Name | John D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Afton Twp |
| 1935 Residence (County) | Cherokee |
| Occupation | Farmer |
| Industry | OA |
| Class of Worker | 0 |
| Hours Worked | 48 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| 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 Blake across 5 US Census years (1900, 1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Effie Blake (~0.92 confidence) and father Fred Blake (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Effie Blake
b. ~1865
Source mother
● Household
· direct · ~0.92
Father
Fred Blake
b. ~1865
Source father
● Household
· direct · ~0.92
This person
Anchor record
John Blake
Head · 1940 · age 46 · b. ~1894 · 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 — Cherokee-County, Iowa
Open full size
1940 US Federal Census — Cherokee-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01147-00016)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Grace Hull | 37 | wife | House Wife | Iowa |
| 2 | Arlene Gilmore | 15 | daughter | Helper | Iowa |
| 3 | Max Gilbert | 38 | Head | Farmer | Iowa |
| 4 | Ruth V. Gilbert | 37 | wife | House Wife | Iowa |
| 5 | Dean C. Gilbert | 16 | son | School Work | Iowa |
| 6 | E. Galen Gilbert | 12 | son | School Work | Iowa |
| 7 | John D. Blake THIS PERSON | 46 | Head | Farmer | Iowa |
| 8 | Agness M. Blake | 40 | wife | House Wife | Iowa |
| 9 | Muriel J. Blake | 18 | daughter | In Nurses Training | Iowa |
| 10 | Rolon Max Blake | 14 | son | School Work | Iowa |
| 11 | Russell J. Blake | 12 | son | School Work | Iowa |
| 12 | Donald D. Blake | 8 | son | — | Iowa |
| 13 | Leonard Schulke | 22 | Head | Farm Hand | Iowa |
| 14 | Helen Schulke | 22 | wife | House Wife | Iowa |
| 15 | Glen A. Loucks | 48 | Head | Farmer | Iowa |
| 16 | Nellie E. Loucks | 51 | wife | House Wife | Iowa |
| 17 | Terrell G. Loucks | 11 | son | School Work | California |
| 18 | Dietrich Hansbruch | 59 | Head | Farmer | Germany |
| 19 | Margaret Hansbruch | 60 | wife | House Wife | Iowa |
| 20 | Walter Hansbruch | 30 | son | Farm Help | Iowa |
| 21 | Herbert Hansbruch | 26 | son | — | Iowa |
| 22 | Ella Hansbruch | 19 | daughter | House Work | Iowa |
| 23 | Alfred Hansbruch | 25 | son | Farm Hand | Iowa |
| 24 | Elnor Hansbruch | 24 | wife | House Work | Canada |
| 25 | Bernhard Braunschweig | 25 | Hired man | Farm Hand | Canada |
| 26 | Otto Braunschweig | 52 | Head | Minister Lutheran | Wisconsin |
| 27 | Lisette Braunschweig | 46 | wife | House Wife | Indiana |
| 28 | Theodore Braunschweig | 20 | son | Home Work | Nebraska |
| 29 | Verona Braunschweig | 18 | daughter | School Work | Nebraska |
| 30 | Ottomare Braunschweig | 17 | son | School Work | Nebraska |
| 31 | Gerhardt Braunschweig | 15 | son | School Work | Nebraska |
| 32 | Annetta Braunschweig | 10 | daughter | School Work | Iowa |
| 33 | Arnold Braunschweig | 11 | son | School Work | Iowa |
| 34 | Anna Marie Braunschweig | 4 | daughter | — | Iowa |
| 35 | Carl Braunschweig | 6 | son | — | Iowa |
| 36 | Robert Braunschweig | 4 | son | — | Iowa |
| 37 | Victor Braunschweig | 1 | son | — | Iowa |
| 38 | Wilber A. Villers | 50 | Head | Farmer | Illinois |
| 39 | Anna B. Villers | 48 | wife | House Wife | Iowa |
| 40 | Russell A. Villers | 19 | son | Home Work | Iowa |
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)