DB
Donald Brown — 1940 US Census Record
Model Tree available1940 United States Federal Census · Washington-County, Iowa
Our Model Tree links this Donald Brown across the 1920, 1930 and 1940 US Censuses in Washington-County, Iowa (XGBoost, ~Confirmed), with identified parents Anna & Chas — first a head (b.~1902), then head of a 6-person household.
Age 38
b. ~1902
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Washington-County, Iowa |
| Surname | Brown |
| Given Name | Donald E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Jackson Twp |
| 1935 Residence (County) | Washington |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 55 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Jackson Twp |
| Est. Birth Year | ~1902 |
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 Donald | Age | Birth yr |
|---|---|---|---|---|
| Phyllis Brown | Daughter | — | 13 | ~1927 |
| Patricia Brown | Daughter | — | 8 | ~1932 |
| Donald Brown | Head | — | 38 | ~1902 |
| Anna Brown | Other | — | 70 | ~1870 |
| Kenneth Swanson | Other | — | 20 | ~1920 |
| Alice Brown | Spouse | — | 35 | ~1905 |
Census Appearances
1920
Washington, Iowa
Son, age 18
Washington, Iowa · implied b. ~1902 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Washington, Iowa
Head, age 28
Washington, Iowa · implied b. ~1902 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Donald E |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 24 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Washington-County, Iowa
Head, age 38
Washington-County, Iowa · implied b. ~1902 — 6 household members
| Surname | Brown |
| Given Name | Donald E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Jackson Twp |
| 1935 Residence (County) | Washington |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 55 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| 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 Donald Brown across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Anna Brown (~0.92 confidence) and father Chas Brown (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Anna Brown
b. ~1871
Source mother
● Household
· direct · ~0.92
Father
Chas Brown
b. ~1872
Source father
● Household
· direct · ~0.92
This person
Anchor record
Donald Brown
Head · 1940 · age 38 · b. ~1902 · 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 — Washington-County, Iowa
Open full size
1940 US Federal Census — Washington-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01211-00275)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles A. Davis | 68 | Brother | — | Iowa |
| 2 | Nettie F. Davis | 65 | Sister | — | Iowa |
| 3 | James R. Davis | 62 | Brother | Farmer | Iowa |
| 4 | Carrie A. Davis | 58 | Sister | — | Iowa |
| 5 | Sam Househal | 20 | Hired Man | Laborer | Iowa |
| 6 | Albert J. Redeker | 26 | Head | Laborer | Kansas |
| 7 | Christine M. Redeker | 20 | Wife | — | Iowa |
| 8 | Mary B. Applegate | 65 | Head | — | Iowa |
| 9 | Elizabeth M. Applegate | 40 | Daughter | — | Iowa |
| 10 | Alice M. Applegate | 28 | Daughter | Bookkeeper | Iowa |
| 11 | Orin J. Larson | 36 | Hired Man | Laborer | Nebraska |
| 12 | Howard E. Applegate | 44 | Head | Farmer | Iowa |
| 13 | Anita M. Applegate | 32 | Wife | — | Iowa |
| 14 | Betty Jean Applegate | 9 | Daughter | — | Iowa |
| 15 | Shirley A. Applegate | 4 | Daughter | — | Iowa |
| 16 | Robert D. Applegate | 1 | Son | — | Iowa |
| 17 | Lawrence F. Heck | 29 | Head | Farmer | Iowa |
| 18 | Madonna G. Heck | 26 | Wife | — | Iowa |
| 19 | Donna M. Heck | 3 | Daughter | — | Iowa |
| 20 | Roberta M. Heck | 1 | Daughter | — | Iowa |
| 21 | James F. O. Havel | 66 | Head | Laborer | Iowa |
| 22 | Rosey Havel | 60 | Wife | — | Bohemia |
| 23 | Mark G. Campbell | 28 | Head | Farmer | Iowa |
| 24 | Mark G. Campbell | 67 | Father | — | Iowa |
| 25 | Bertha J. Campbell | 66 | Mother | — | Iowa |
| 26 | Cornelius O. Marek | 24 | Head | Farmer | Iowa |
| 27 | Mary J. Marek | 19 | Wife | — | Iowa |
| 28 | Donald E. Brown THIS PERSON | 38 | Head | Farmer | Iowa |
| 29 | Alice M. Brown | 35 | Wife | — | Iowa |
| 30 | Phyllis A. Brown | 13 | Daughter | — | Iowa |
| 31 | Patricia A. Brown | 8 | Daughter | — | Iowa |
| 32 | Kenneth Swanson | 20 | Hired Man | Laborer | Iowa |
| 33 | Anna P. Brown | 70 | Mother | — | Iowa |
| 34 | Ernest W. Gideon | 37 | Head | Farmer | Iowa |
| 35 | Ruth M. Gideon | 34 | Sister | Teacher | Iowa |
| 36 | May I. Gideon | 29 | Sister | — | Iowa |
| 37 | Celina C. Gideon | 65 | Mother | — | Iowa |
| 38 | Ray Niffenegger | 34 | Head | Farmer | Iowa |
| 39 | Veda L. Niffenegger | 31 | Wife | — | Iowa |
| 40 | Robert R. Niffenegger | 6 | Son | — | Iowa |
Pedigree Summary
Donald
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)