FB
Fred Brown — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Fred Brown across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents William & W — first a spouse (b.~1915), then head of a 9-person household.
Age 25
b. ~1915
Male
Spouse
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Brown |
| Given Name | Fred H. |
| Relationship to Head | Husband |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Inspector |
| Industry | Motor |
| Class of Worker | GW |
| Hours Worked | 44 |
| Income (1939) | 1500 |
| Highest Grade | H 4 |
| 1935 Residence | Same Pl. |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Inspector |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1915 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Fred | Age | Birth yr |
|---|---|---|---|---|
| Harry Montgomery | Head | — | 41 | ~1899 |
| Fred Brown | Son | — | 2 | ~1938 |
| Opal Bell | Spouse | — | 47 | ~1893 |
| Rhea Montgomery | Spouse | — | 43 | ~1897 |
| Bernice Brown | Spouse | — | 24 | ~1916 |
| Earl Bair | Spouse | — | 35 | ~1905 |
| Alice Bair | Spouse | — | 34 | ~1906 |
| Fred Brown | Spouse | — | 25 | ~1915 |
| Glenn Bell | Spouse | — | 48 | ~1892 |
Census Appearances
1920
Polk, Iowa
Son, age 4
Polk, Iowa · implied b. ~1916 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Fred |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Son, age 15
Polk, Iowa · implied b. ~1915 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Fred |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Spouse, age 25
Polk-County, Iowa · implied b. ~1915 — 9 household members
| Surname | Brown |
| Given Name | Fred H. |
| Relationship to Head | Husband |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Inspector |
| Industry | Motor |
| Class of Worker | GW |
| Hours Worked | 44 |
| Income (1939) | 1500 |
| Highest Grade | H 4 |
| 1935 Residence | Same Pl. |
| 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 Fred Brown across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Brown (~0.92 confidence) and father W Brown (~0.92 confidence) and mother Nellie Brown (~0.92 confidence) and mother Nell Brown (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Brown
b. ~1873
Source father
● Household
· direct · ~0.92
Father
W Brown
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Nellie Brown
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Nell Brown
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Fred Brown
Spouse · 1940 · age 25 · b. ~1915 · 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 — Polk-County, Iowa
Open full size
1940 US Federal Census — Polk-County, Iowa
Page Contents
12 people indexed on this census page (nara:1940:m-t0627-01196-00322)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | B. E. Trout | 65 | Head | Dentist | Iowa |
| 2 | Grace H. Trout | 52 | Wife | Housewife | Iowa |
| 3 | Margaret L. Trout | 26 | Daughter | Stenographer | Iowa |
| 4 | Harry W. Montgomery | 41 | Head | Bookkeeper | Nebr. |
| 5 | Rhea M. Montgomery | 43 | Wife | Housewife | Iowa |
| 6 | Glenn T. Bell | 48 | Husband | Salesman | Iowa |
| 7 | Opal P. Bell | 47 | Wife | Housewife | Iowa |
| 8 | Earl P. Bair | 35 | Husband | Carpenter | S. Dakota |
| 9 | Alice P. Bair | 34 | Wife | Clerk | Iowa |
| 10 | Fred H. Brown THIS PERSON | 25 | Husband | Inspector | Iowa |
| 11 | Bernice K. Brown | 24 | Wife | Housewife | Iowa |
| 12 | Fred G. Brown | 2 | Son | — | Iowa |
Pedigree Summary
Fred
Gen 1 · 4 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)