MD
Mary Downey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Ottawa-County, Ohio
Our Model Tree links this Mary Downey across the 1930 and 1940 US Censuses in Ottawa-County, Ohio (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 5-person household.
Age 10
b. ~1930
Female
Daughter
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Ottawa-County, Ohio |
| Surname | Downey |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Elmore |
| 1935 Residence (County) | Ottawa |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Clay Township |
| Est. Birth Year | ~1930 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| James Downey | Son | — | 11 | ~1929 |
| Mary Downey | Daughter | — | 10 | ~1930 |
| Thomas Downey | Son | — | 10 | ~1930 |
| Ann Downey | Spouse | — | 40 | ~1900 |
| Sam Downey | Head | — | 43 | ~1897 |
Census Appearances
1930
Ottawa, Ohio
Daughter, age
Ottawa, Ohio · implied b. ~1930 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Downey |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Ottawa-County, Ohio
Daughter, age 10
Ottawa-County, Ohio · implied b. ~1930 — 5 household members
| Surname | Downey |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Elmore |
| 1935 Residence (County) | Ottawa |
| Highest Grade | No 5 |
| 1935 Residence | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 Downey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Downey
Daughter · 1940 · age 10 · b. ~1930 · Ohio
★ You are viewing this record
Sibling
Thomas Downey
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Downey
Sibling · 1940 · age 11
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 — Ottawa-County, Ohio
Open full size
1940 US Federal Census — Ottawa-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03125-00255)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Julia S. Langermier | 30 | Daughter | Teacher | Ohio |
| 2 | Almon P. Trumon | 81 | Head | — | Ohio |
| 3 | Julia A. Trumon | 72 | Wife | — | Ohio |
| 4 | Ralph C. Rothert | 37 | Head | Farmer | Ohio |
| 5 | Galen L. Rothert | 7 | Son | — | Ohio |
| 6 | Lowell S. Rothert | 3 | Son | — | Ohio |
| 7 | Ella Druckenmiller | 48 | Housekeeper | Housekeeper | Ohio |
| 8 | Henry S. Schmidlin | 57 | Head | Farmer | Ohio |
| 9 | Mathilda Schmidlin | 47 | Wife | — | Ohio |
| 10 | Dale H. Schmidlin | 30 | Son | Farmer | Ohio |
| 11 | George A. Schmidlin | 24 | Son | Farmer | Ohio |
| 12 | Evelina Schmidlin | 53 | Sister | — | Ohio |
| 13 | John A. Maguig | 51 | Head | Farmer | Ohio |
| 14 | Eva A. Maguig | 46 | Wife | — | Washington |
| 15 | Virgil S. Maguig | 23 | Son | Trucker | Washington |
| 16 | Jalis E. Maguig | 21 | Son | — | Washington |
| 17 | Calvin J. Maguig | 16 | Son | — | Ohio |
| 18 | Maguig | 14 | Daughter | — | Ohio |
| 19 | Ellis V. Shook | 26 | Head | Hydraulic Man | Ohio |
| 20 | Bertha M. Shook | 25 | Wife | — | Ohio |
| 21 | Jonella J. Shook | 7 | Daughter | — | Ohio |
| 22 | Martha Bertz | 63 | Head | — | Germany |
| 23 | Erwin Bertz | 33 | Son | Farmer | Ohio |
| 24 | Taken Enumeration | None | in | — | — |
| 25 | Edward H. Tsech | 45 | Head | Farmer | Ohio |
| 26 | Esther E. Tsech | 37 | Wife | — | Ohio |
| 27 | Eileen Tsech | 14 | Daughter | — | Ohio |
| 28 | Ruth M. Tsech | 10 | Daughter | — | Ohio |
| 29 | Lorraine Tsech | 6 | Daughter | — | Ohio |
| 30 | Frank E. Mccormick | 53 | Head | Farmer | Michigan |
| 31 | Thirza Mccormick | 44 | Wife | Teacher | Michigan |
| 32 | Jesse H. Camper | 62 | Head | Farmer | Ohio |
| 33 | Nettie Camper | 50 | Wife | — | Ohio |
| 34 | Cora Gregg | 79 | Head | — | Ohio |
| 35 | Inez Gregg | 47 | Daughter | Teacher | Ohio |
| 36 | Sam E. Downey | 43 | Head | Works Mgr. | Pennsylvania |
| 37 | Ann Downey | 40 | Wife | — | Pennsylvania |
| 38 | James C. Downey | 11 | Son | — | Ohio |
| 39 | Mary A. Downey THIS PERSON | 10 | Daughter | — | Ohio |
| 40 | Thomas V. Downey | 10 | Son | — | Ohio |
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)