MD
Mary Donovan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Sioux-County, Iowa
Our Model Tree links this Mary Donovan across the 1930 and 1940 US Censuses in Sioux-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1895), then head of a 10-person household.
Age 45
b. ~1895
Female
Spouse
Born: Missouri
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Sioux-County, Iowa |
| Surname | Donovan |
| Given Name | Mary Alice |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | Ireton Town |
| 1935 Residence (County) | Sioux |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Township / Ward | Ireton Town |
| Est. Birth Year | ~1895 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mildred Donovan | Daughter | — | 9 | ~1931 |
| Catherine Larson | Daughter | — | 22 | ~1918 |
| Hildred Donovan | Daughter | — | 7 | ~1933 |
| Alice Donovan | Daughter | — | 15 | ~1925 |
| Betty Donovan | Daughter | — | 4 | ~1936 |
| John Donovan | Head | — | 51 | ~1889 |
| Orvil Donovan | Son | — | 6 | ~1934 |
| James Donovan | Son | — | 11 | ~1929 |
| John Donovan | Son | — | 13 | ~1927 |
| Mary Donovan | Spouse | — | 45 | ~1895 |
Census Appearances
1930
Sioux, Iowa
Other, age 35
Sioux, Iowa · implied b. ~1895 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donovan |
| Given Name | Mary A. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Missouri |
| Age at First Marriage | 19 |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Sioux-County, Iowa
Spouse, age 45
Sioux-County, Iowa · implied b. ~1895 — 10 household members
| Surname | Donovan |
| Given Name | Mary Alice |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | Ireton Town |
| 1935 Residence (County) | Sioux |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Donovan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Donovan
Spouse · 1940 · age 45 · b. ~1895 · 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 — Sioux-County, Iowa
Open full size
1940 US Federal Census — Sioux-County, Iowa
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-01205-00519)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Lela Pierson | 29 | Head | Beauty | Iowa |
| 42 | W. Marsinau | 49 | Head | — | Iowa |
| 43 | Alma C. Marsinau | 50 | Wife | — | Iowa |
| 44 | Eva Frances Marsinau | 23 | Daughter | Clerk | Iowa |
| 45 | Lavon|Lavonne Jean Marsinau | 13 | Daughter | — | Iowa |
| 46 | Henry F. Marsinau | 45 | Head | Painter | Iowa |
| 47 | Alvina Marsinau | 41 | Wife | — | Iowa |
| 48 | Harold Marsinau | 22 | Son | — | Iowa |
| 49 | Wayne Marsinau | 19 | Son | — | So. Dak. |
| 50 | Dayna Mae Marsinau | 13 | Daughter | — | Iowa |
| 51 | Verla Marsinau | 7 | Daughter | — | Iowa |
| 52 | A. Den Ouden | 56 | Head | Day | Netherlands |
| 53 | Catherine Den Ouden | 50 | Wife | — | S. Dak. |
| 54 | Johanna Den Ouden | 22 | Daughter | House | Luton |
| 55 | Madeline Den Ouden | 20 | Daughter | House | Luton |
| 56 | Alice Den Ouden | 18 | Daughter | — | Luton |
| 57 | Carnie Den Ouden | 14 | Son | — | Luton |
| 58 | Bertha Den Ouden | 10 | Daughter | — | Luton |
| 59 | H. Terpstra | 72 | Head | Brick & Tile | Netherlands |
| 60 | #5 End Of Block #5 | 5 | #5 | #5 | #5 |
| 61 | John W. Donovan | 51 | Head | Mason | Missouri |
| 62 | Mary Alice Donovan THIS PERSON | 45 | Wife | — | Missouri |
| 63 | Alice Mae Donovan | 15 | Daughter | — | Missouri |
| 64 | John W. Donovan | 13 | Son | — | Missouri |
| 65 | James M. Donovan | 11 | Son | — | Iowa |
| 66 | Mildred Donovan | 9 | Daughter | — | Iowa |
| 67 | Hildred Donovan | 7 | Daughter | — | Iowa |
| 68 | Orvil Albert Donovan | 6 | Son | — | Iowa |
| 69 | Betty Jane Donovan | 4 | Daughter | — | Iowa |
| 70 | Catherine Larson | 22 | Daughter | House | Missouri |
| 71 | Albert Dirks | 64 | Head | Laborer | Iowa |
| 72 | Henry Dirks | 60 | Brother | — | Iowa |
| 73 | Alice Stewart | 78 | Head | — | Indiana |
| 74 | Erwin J. Bender | 39 | Head | Dentist | Missouri |
| 75 | Melba Bender | 34 | Wife | — | Iowa |
| 76 | Oscar Schuly | 28 | Head | Cafe | S. Dak. |
| 77 | Iris Schuly | 21 | Wife | — | Iowa |
| 78 | Carrie Gale Schuly | 0 | Daughter | — | Iowa |
Related Census Records
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)