MC
Mary Cain — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Wapello-County, Iowa
Our Model Tree links this Mary Cain across the 1930 and 1940 US Censuses in Wapello-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 6-person household.
Age 15
b. ~1925
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Wapello-County, Iowa |
| Surname | Cain |
| Given Name | Mary Louise |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Ottumwa |
| 1935 Residence (County) | Wapello County |
| Additional Details | |
| Industry | S |
| Class of Worker | 0 |
| Highest Grade | H-2 |
| 1935 Residence | Same house |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Ottumwa |
| Est. Birth Year | ~1925 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Robert Cain | Son | — | 10 | ~1930 |
| Margaret Cain | Spouse | — | 42 | ~1898 |
| Fred Cain | Son | — | 18 | ~1922 |
| Homer Cain | Son | — | 2 | ~1938 |
| Robert Cain | Head | — | 46 | ~1894 |
| Mary Cain | Daughter | — | 15 | ~1925 |
Census Appearances
1930
Wapello, Iowa
Daughter, age 5
Wapello, Iowa · implied b. ~1925 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cain |
| Given Name | Mary Louise |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Wapello-County, Iowa
Daughter, age 15
Wapello-County, Iowa · implied b. ~1925 — 6 household members
| Surname | Cain |
| Given Name | Mary Louise |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Ottumwa |
| 1935 Residence (County) | Wapello County |
| Industry | S |
| Class of Worker | 0 |
| Highest Grade | H-2 |
| 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 Mary Cain across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Cain
Daughter · 1940 · age 15 · b. ~1925 · Iowa
★ You are viewing this record
Sibling
Robert Cain
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Fred Cain
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Homer Cain
Sibling · 1940 · age 2
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-t0627-01209-00813)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Paul Stufflebeam | 32 | Head | Laborer | Iowa |
| 2 | Nemoa Stufflebeam | 28 | Wife | — | Iowa |
| 3 | Vanda Stufflebeam | 11 | Daughter | — | Iowa |
| 4 | Buddy Stufflebeam | 9 | Son | — | Iowa |
| 5 | William Grace | 25 | Head | Mech | Iowa |
| 6 | Edna V. Grace | 27 | Wife | — | Iowa |
| 7 | Joyce Grace | 3 | Daughter | — | Iowa |
| 8 | Sandra Grace | 0 | Daughter | — | Iowa |
| 9 | Robert Cain | 46 | Head | Floor Sander | Iowa |
| 10 | Margaret R. Cain | 42 | Wife | — | Illinois |
| 11 | Fred Cain | 18 | Son | — | Iowa |
| 12 | Mary Louise Cain THIS PERSON | 15 | Daughter | — | Iowa |
| 13 | Robert Cain | 10 | Son | — | Iowa |
| 14 | Homer Cain | 2 | Son | — | Iowa |
| 15 | Edna Harris | 68 | Head | — | Iowa |
| 16 | Geneva Harris | 28 | Daughter | Clerk | Iowa |
| 17 | Ida Wilkins | 67 | Head | — | Iowa |
| 18 | Bruce Grooms | 63 | Head | Carpenter | Iowa |
| 19 | Nellie Grooms | 59 | Wife | — | Iowa |
| 20 | Herbert Grooms | 22 | Son | Laborer | Iowa |
| 21 | Harold Grooms | 35 | Head | Laborer | Iowa |
| 22 | Mable Grooms | 31 | Wife | — | Iowa |
| 23 | Sharon Kay Grooms | 4 | Daughter | — | Iowa |
| 24 | John Dennis Grooms | 2 | Son | — | Iowa |
| 25 | Raymond Harry | 29 | Head | Laborer | Iowa |
| 26 | Mary Harry | 28 | Wife | — | Iowa |
| 27 | Gwendolyn Harry | 0 | Daughter | — | Iowa |
| 28 | Herman Spurgeon | 42 | Head | Laborer | Iowa |
| 29 | Edith Spurgeon | 42 | Wife | — | Iowa |
| 30 | Ralph Spurgeon | 22 | Son | Laborer | Iowa |
| 31 | Harold Spurgeon | 19 | Son | Farm Help | Iowa |
| 32 | Hilda Spurgeon | 19 | Daughter | Housework | Iowa |
| 33 | Marie Spurgeon | 18 | Daughter | — | Iowa |
| 34 | Charles Gilbert | 72 | Head | — | Iowa |
| 35 | Bertha Gilbert | 63 | Wife | — | Iowa |
| 36 | Herbert Leon | 36 | Head | Laborer | Iowa |
| 37 | Margie Leon | 33 | Wife | — | Iowa |
| 38 | Dorothy Leon | 7 | Daughter | — | Iowa |
| 39 | Donna Leon | 2 | Daughter | — | Iowa |
| 40 | Lon Buchanan | 61 | Son-in-law | Carpenter | Iowa |
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)