WA
William Arnold — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Wapello-County, Iowa
Our Model Tree links this William Arnold across the 1920, 1930 and 1940 US Censuses in Wapello-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1867), then head of a 4-person household.
Age 73
b. ~1867
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Wapello-County, Iowa |
| Surname | ARNOLD |
| Given Name | WILLIAM R |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 73 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Adams Twp |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 35 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Adams Twp |
| Est. Birth Year | ~1867 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Vera Arnold | Daughter | — | 19 | ~1921 |
| William Arnold | Head | — | 73 | ~1867 |
| William Arnold | Son | — | 17 | ~1923 |
| Mary Arnold | Spouse | — | 61 | ~1879 |
Census Appearances
1920
Wapello, Iowa
Head, age 52
Wapello, Iowa · implied b. ~1868 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Arnold |
| Given Name | William V |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Ohio |
| Occupation | Farmer |
| Industry | Truck farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Wapello, Iowa
Head, age 63
Wapello, Iowa · implied b. ~1867 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Arnold |
| Given Name | Will H |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 22 |
| Father's Birthplace | England |
| Mother's Birthplace | Indiana |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | 1000 |
| Home Value / Rent | R |
| Veteran | O |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Wapello-County, Iowa
Head, age 73
Wapello-County, Iowa · implied b. ~1867 — 4 household members
| Surname | ARNOLD |
| Given Name | WILLIAM R |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 73 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Adams Twp |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 35 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 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 William Arnold across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
William Arnold
Head · 1940 · age 73 · b. ~1867 · Iowa
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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-t0627-01209-00025)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Donald Dolton | 29 | Head | Laborer | Iowa |
| 42 | Edna B Dolton | 34 | Wife | — | Iowa |
| 43 | Donald L Dolton | 7 | Son | — | Iowa |
| 44 | Derrel E Dolton | 5 | Son | — | Iowa |
| 45 | Max M Watters | 34 | Head | Farmer | Iowa |
| 46 | Mattie R Watters | 32 | Wife | — | Iowa |
| 47 | Ruth M Watters | 9 | Daughter | — | Iowa |
| 48 | William F Watters | 8 | Son | — | Iowa |
| 49 | Dorthy M Watters | 1 | Daughter | — | Iowa |
| 50 | Thomas S Watters | 81 | Father | — | Iowa |
| 51 | Dan Fletcher | 63 | Head | Farmer | Iowa |
| 52 | Florence M Fletcher | 55 | Wife | — | Iowa |
| 53 | Edna M Fletcher | 17 | Daughter | — | Iowa |
| 54 | John L Wagner | 46 | Head | Farmer | Iowa |
| 55 | Sylvia E Wagner | 44 | Wife | — | Iowa |
| 56 | Mary C Wagner | 17 | Daughter | — | Iowa |
| 57 | George K Wagner | 9 | Son | — | Iowa |
| 58 | Sara C Bedwell | 80 | Mother-in-law | — | Iowa |
| 59 | Theodore V Rose | 31 | Head | Dragline Operator | Iowa |
| 60 | Juanita E Rose | 27 | Wife | — | Iowa |
| 61 | Larry T Rose | 5 | Son | — | Iowa |
| 62 | Sharon K Rose | 4 | Daughter | — | Iowa |
| 63 | Sonja R Rose | 2 | Daughter | — | Iowa |
| 64 | William R Arnold THIS PERSON | 73 | Head | Farmer | Iowa |
| 65 | Mary A Arnold | 61 | Wife | — | Iowa |
| 66 | Vera L Arnold | 19 | Daughter | — | Iowa |
| 67 | William R Jr Arnold | 17 | Son | Laborer | Iowa |
| 68 | Ralph J Helmick | 24 | Head | Farmer | Iowa |
| 69 | Neva G Helmick | 23 | Wife | — | Iowa |
| 70 | Anna L Helmick | 2 | Daughter | — | Iowa |
| 71 | Willie Smith | 68 | Head | Farmer | Iowa |
| 72 | James Smith | 25 | Son | Laborer | Iowa |
| 73 | Lloyd S Smith | 23 | Son | Laborer | Iowa |
| 74 | Paul W Shirley | 41 | Head | Laborer | Missouri |
| 75 | Esabell C Shirley | 38 | Wife | — | Iowa |
| 76 | Lawrence W Shirley | 20 | Son | Laborer | Missouri |
| 77 | Laura E Shirley | 18 | Daughter | — | Iowa |
| 78 | Lula J Shirley | 16 | Daughter | — | Missouri |
| 79 | Esther E Shirley | 15 | Daughter | — | Missouri |
| 80 | Ruth N Shirley | 12 | Daughter | — | Missouri |
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)