LD
Lawrence Davis — 1940 US Census Record
Model Tree available1940 United States Federal Census · Pottawattamie-County, Iowa
Our Model Tree links this Lawrence Davis across the 1920, 1930 and 1940 US Censuses in Pottawattamie-County, Iowa (XGBoost, ~Confirmed), with identified parents Thomas & Martha — first a head (b.~1904), then head of a 6-person household.
Age 36
b. ~1904
Male
Head
Born: Nebraska
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Pottawattamie-County, Iowa |
| Surname | DAVIS |
| Given Name | LAWRENCE W |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Nebraska |
| 1935 Residence (City) | Some Place |
| 1935 Residence (County) | Pottawattamie |
| Additional Details | |
| Occupation | JANITOR |
| Industry | CITY WATER SUPPLY |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 740 |
| Highest Grade | No 8 |
| 1935 Residence | Iowa |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
| Occupation | Janitor |
| Township / Ward | Council Bluffs City |
| Est. Birth Year | ~1904 |
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 |
|---|---|---|---|---|
| Erma Davis | Spouse | — | 36 | ~1904 |
| Beula Davis | Daughter | — | 14 | ~1926 |
| Beverly Davis | Daughter | — | 7 | ~1933 |
| Beulah Davis | Other | — | 71 | ~1869 |
| Lawrence Davis | Head | — | 36 | ~1904 |
| Lawrence Davis | Son | — | 17 | ~1923 |
Census Appearances
1920
Mills, Iowa
Son, age 16
Mills, Iowa · implied b. ~1904 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Lawrence H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Nebraska |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Illinois |
| Occupation | Farm Laborer |
| Industry | At Home |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
1930
Pottawattamie, Iowa
Head, age 27
Pottawattamie, Iowa · implied b. ~1903 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Lawrence W |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Nebraska |
| Age at First Marriage | 19 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Illinois |
| Occupation | Fireman |
| Industry | Steam Railway |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 15 |
| Radio Set | R |
| Veteran | no |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
1940
Pottawattamie-County, Iowa
Head, age 36
Pottawattamie-County, Iowa · implied b. ~1904 — 6 household members
| Surname | DAVIS |
| Given Name | LAWRENCE W |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Nebraska |
| 1935 Residence (City) | Some Place |
| 1935 Residence (County) | Pottawattamie |
| Occupation | JANITOR |
| Industry | CITY WATER SUPPLY |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 740 |
| Highest Grade | No 8 |
| 1935 Residence | Iowa |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
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 Davis across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father Thomas Davis (~0.92 confidence) and mother Martha Davis (~0.83 confidence) and mother Beulah Davis (~0.92 confidence). The pedigree spans 2 generations with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.89
Father
Thomas Davis
b. ~1867
Source father
● Household
· direct · ~0.92
Mother
Martha Davis
b. ~1838
Source father>mother
● Household
· direct · ~0.83
Mother
Beulah Davis
b. ~1879
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Lawrence Davis
Head · 1940 · age 36 · b. ~1904 · 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 — Pottawattamie-County, Iowa
Open full size
1940 US Federal Census — Pottawattamie-County, Iowa
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01199-00482)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Bertha Summers | 50 | LODGER | Housekeeper | Iowa |
| 2 | Leslie A Dieven Dorf | 51 | LODGER | Dairy Hand | New York |
| 3 | Steven B Rawlings | 43 | Head | Scaleman | Iowa |
| 4 | Bessie Rawlings | 34 | Wife | — | Missouri |
| 5 | Beryl Rawlings | 16 | Son | Hand Bill Distributor | Nebraska |
| 6 | Alfred C Franks | 26 | Head | Stacker | Iowa |
| 7 | Opal Franks | 23 | WIFE | — | Iowa |
| 8 | Warren Franks | 4 | SON | — | Nebraska |
| 9 | Dennis P O'Hanlon | 22 | Head | Stock Clerk | Iowa |
| 10 | Maxine O'Hanlon | 24 | Wife | Waitress | Iowa |
| 11 | Minnex Shun Dhe Mire | 64 | Head | — | Missouri |
| 12 | Earl F Mahan | 34 | Head | Floor Foreman | Iowa |
| 13 | Emma Mahan | 37 | Wife | — | Iowa |
| 14 | Earl Jr Mahan | 13 | Son | — | Iowa |
| 15 | Edward Mahan | 11 | Son | — | Iowa |
| 16 | Emogene Mahan | 10 | Daughter | — | Iowa |
| 17 | Evelyn Mahan | 8 | Daughter | — | Iowa |
| 18 | Elwood Mahan | 6 | Son | — | Iowa |
| 19 | Erwin Mahan | 2 | Son | — | Iowa |
| 20 | Eldon Mahan | 0 | Son | — | Iowa |
| 21 | William A Poulson | 18 | Head | Checker | Iowa |
| 22 | Marie Poulson | 21 | Wife | — | Iowa |
| 23 | Lawrence W Davis THIS PERSON | 36 | Head | Janitor | Nebraska |
| 24 | Erma Davis | 36 | Wife | — | Nebraska |
| 25 | Lawrence Jr Davis | 17 | Son | — | Iowa |
| 26 | Beula Jean Davis | 14 | Daughter | — | Iowa |
| 27 | Beverly Davis | 7 | Daughter | — | Iowa |
| 28 | Beulah Davis | 71 | MOTHER | — | Illinois |
| 29 | Allen O Mccallum | 26 | Head | Truck Delivery | Iowa |
| 30 | Ruth Mccallum | 22 | Wife | — | Iowa |
| 31 | Jackquelynn Mccallum | 3 | Daughter | — | Iowa |
| 33 | Aaron P Papst | 60 | Head | Passenger Brakeman | Nebraska |
| 34 | Alm Papst | 52 | Wife | — | Nebraska |
| 35 | James Mrkacek | 43 | Head | Painter | Czechoslovakia |
| 36 | Mary Mrkacek | 43 | Wife | — | Czechoslovakia |
| 37 | Joseph Mrkacek | 17 | Son | — | Nebraska |
| 38 | Josephine Mrkacek | 17 | Daughter | — | Nebraska |
| 39 | James Jr Mrkacek | 8 | Son | — | Nebraska |
| 40 | Arthur B Fletcher | 55 | Head | Trucker | Iowa |
Pedigree Summary
Lawrence
Gen 1 · 2 parents
~0.92
Gen 2 · 1 grandparents
~0.83
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)