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Lawrence Brown — 1940 US Census Record
Model Tree available1940 United States Federal Census · Wapello-County, Iowa
Our Model Tree links this Lawrence Brown across the 1920, 1930 and 1940 US Censuses in Wapello-County, Iowa (XGBoost, ~Confirmed), with identified parents Lawrence & Hazel — first a son (b.~1913), then head of a 6-person household.
Age 27
b. ~1913
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Wapello-County, Iowa |
| Surname | Brown |
| Given Name | Lawrence R Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Ottumwa City |
| 1935 Residence (County) | Wapello County |
| Additional Details | |
| Occupation | Laborer |
| Industry | Meat packing plant |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 1335 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Laborer |
| Township / Ward | Ottumwa City |
| Est. Birth Year | ~1913 |
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 Lawrence | Age | Birth yr |
|---|---|---|---|---|
| Wanda Lucas | Daughter | — | 20 | ~1920 |
| Lawrence Brown | Head | — | 54 | ~1886 |
| Woodrow Lucas | Other | — | 24 | ~1916 |
| Le Lucas | Other | — | ~1940 | |
| Lawrence Brown | Son | — | 27 | ~1913 |
| Ethel Brown | Spouse | — | 46 | ~1894 |
Census Appearances
1920
Wapello, Iowa
Son, age 7
Wapello, Iowa · implied b. ~1913 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Lawrence Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| 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
Wapello, Iowa
Son, age 17
Wapello, Iowa · implied b. ~1913 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Lawrence R |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| 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
Wapello-County, Iowa
Son, age 27
Wapello-County, Iowa · implied b. ~1913 — 6 household members
| Surname | Brown |
| Given Name | Lawrence R Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Ottumwa City |
| 1935 Residence (County) | Wapello County |
| Occupation | Laborer |
| Industry | Meat packing plant |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 1335 |
| Highest Grade | H 4 |
| 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 Lawrence Brown across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Lawrence Brown (~0.92 confidence) and mother Hazel Brown (~0.92 confidence) and mother Ethel Brown (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Lawrence Brown
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Hazel Brown
b. ~1891
Source mother
● Household
· direct · ~0.92
Mother
Ethel Brown
b. ~1894
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Lawrence Brown
Son · 1940 · age 27 · b. ~1913 · Iowa
★ You are viewing this record
Sibling
Wanda Lucas
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Wapello-County, Iowa
Open full size
1940 US Federal Census — Wapello-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01209-00747)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | David D Richard | 1 | Son | — | Iowa |
| 42 | George G Richard | 38 | Head | Fireman | Iowa |
| 43 | Opal C Richard | 35 | Wife | — | Iowa |
| 44 | Donald H Richard | 18 | Son | — | Iowa |
| 45 | Jerry R Richard | 10 | Son | — | Iowa |
| 46 | Reed E Travis | 39 | Head | — | Iowa |
| 47 | Dona M Travis | 40 | Wife | — | Iowa |
| 48 | Doris M Travis | 9 | Daughter | — | Iowa |
| 49 | Richard L Travis | 6 | Son | — | Iowa |
| 50 | John V Becker | 33 | Head | — | Iowa |
| 51 | Ione L Becker | 32 | Wife | — | Iowa |
| 52 | Mary I Becker | 14 | Daughter | — | Iowa |
| 53 | Eugene H Mccullough | 24 | Head | Laborer | Iowa |
| 54 | Ella Beryl Mccullough | 17 | Wife | — | Iowa |
| 55 | George Griffin | 36 | Head | Laborer | Iowa |
| 56 | Mary Griffin | 35 | Wife | — | Iowa |
| 57 | Donna Griffin | 4 | Daughter | — | Iowa |
| 58 | Lawrence R Brown | 54 | Head | Foreman | Iowa |
| 59 | Ethel M Brown | 46 | Wife | — | Iowa |
| 60 | Lawrence R Jr Brown THIS PERSON | 27 | Son | Laborer | Iowa |
| 61 | Wanda L Lucas | 20 | Daughter | — | Iowa |
| 62 | Woodrow D Lucas | 24 | Son in law | Clerk | Iowa |
| 63 | Le Roy D Lucas | 0 | Grand son | — | Iowa |
| 64 | Lewis D Freeman | 27 | Head | Laborer | Iowa |
| 65 | Edna L Freeman | 21 | Wife | — | Iowa |
| 66 | Lewis G Freeman | 2 | Son | — | Iowa |
| 67 | Fred G Hunt | 36 | Head | Laborer | Iowa |
| 68 | Olive S Hunt | 35 | Wife | Egg Broker | Iowa |
| 69 | John L Hunt | 15 | Son | — | Iowa |
| 70 | Curtis J Addison | 24 | Head | Laborer | Iowa |
| 71 | Dorothy L Addison | 20 | Wife | Egg Broker | Iowa |
| 72 | Hobart Hairline | 43 | Head | Laborer | Illinois |
| 73 | Lola M Hairline | 48 | Wife | — | Iowa |
| 74 | Earl H Hairline | 10 | Son | — | Iowa |
| 75 | Pearl E Hairline | 22 | Son | Laborer | Iowa |
| 76 | William E Greeley | 64 | Head | Painter | Missouri |
| 77 | Elizabeth Greeley | 71 | Wife | — | Illinois |
| 78 | Gertrude M Buchanan | 30 | Daughter | — | Illinois |
| 79 | Lawrence R Buchanan | 31 | Son in law | Attendant | Iowa |
| 80 | James W Jr Greeley | 10 | Son | — | Iowa |
Pedigree Summary
Lawrence + 1 sibling
Gen 1 · 3 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)