MC
Mary Case — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hamilton-County, Ohio
Our Model Tree links this Mary Case across the 1930 and 1940 US Censuses in Hamilton-County, Ohio (XGBoost, ~Confirmed) — first a spouse (b.~1902), then head of a 6-person household.
Age 38
b. ~1902
Female
Spouse
Born: Scotland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Hamilton-County, Ohio |
| Surname | Case |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Madeira Village |
| 1935 Residence (County) | Hamilton |
| Naturalization Status | Naturalized |
| Additional Details | |
| Industry | 0 |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Township / Ward | Madeira Village |
| Est. Birth Year | ~1902 |
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 |
|---|---|---|---|---|
| Harriet Case | Daughter | — | 12 | ~1928 |
| Herbert Case | Head | — | 36 | ~1904 |
| Mary Case | Spouse | — | 38 | ~1902 |
| Mary Case | Daughter | — | 10 | ~1930 |
| William Case | Son | — | 8 | ~1932 |
| Robert Case | Son | — | 5 | ~1935 |
Census Appearances
1930
Hamilton, Ohio
Other, age 27
Hamilton, Ohio · implied b. ~1903 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Case |
| Given Name | Mary N. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1908 |
| Age at First Marriage | 24 |
| Father's Birthplace | North Ireland |
| Mother's Birthplace | Scotland |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Hamilton-County, Ohio
Spouse, age 38
Hamilton-County, Ohio · implied b. ~1902 — 6 household members
| Surname | Case |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Madeira Village |
| 1935 Residence (County) | Hamilton |
| Naturalization Status | Naturalized |
| Industry | 0 |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 Case across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Case
Spouse · 1940 · age 38 · b. ~1902 · Ohio
★ 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 — Hamilton-County, Ohio
Open full size
1940 US Federal Census — Hamilton-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03076-00333)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William Fey | 46 | Head | Machinist | Ohio |
| 2 | Elizabeth Fey | 26 | Wife | — | Ohio |
| 3 | Alice Mary Fey | 4 | Daughter | — | Ohio |
| 4 | Herschel Fey | 17 | Son | — | Indiana |
| 5 | James Selford | 64 | Head | New Worker Real Estate | Ohio |
| 6 | Mary Selford | 65 | Wife | — | New York |
| 7 | Scott W. Selford | 21 | Son | Truck Driver | Ohio |
| 8 | George Stummel | 28 | Head | — | Ohio |
| 9 | Margaret Stummel | 25 | Wife | — | Ohio |
| 10 | Laura Turner | 89 | Head | — | Ohio |
| 11 | Emma Williams | 63 | Daughter | — | Ohio |
| 12 | Howard De Mar | 42 | Head | Postmaster | Ohio |
| 13 | Nora De Mar | 39 | Wife | — | Kentucky |
| 14 | Russell De Mar | 14 | Son | — | Ohio |
| 15 | James T. De Mar | 78 | Head | — | Ohio |
| 16 | Elizabeth De Mar | 72 | Wife | — | Ohio |
| 17 | John Rooney | 27 | Head | Machinist | Ohio |
| 18 | Gladys Rooney | 29 | Wife | — | Tennessee |
| 19 | Herbert Case | 36 | Head | Plasterer | Ohio |
| 20 | Mary Case THIS PERSON | 38 | Wife | — | Scotland |
| 21 | Harriet Case | 12 | Daughter | — | Ohio |
| 22 | Mary Louise Case | 10 | Daughter | — | Ohio |
| 23 | William Case | 8 | Son | — | Ohio |
| 24 | Robert Case | 5 | Son | — | Ohio |
| 25 | Delbert De Mar | 44 | Head | Traveling Salesman | Ohio |
| 26 | Grace De Mar | 43 | Wife | — | Washington |
| 27 | Eugene De Mar | 18 | Son | — | Ohio |
| 28 | Del Thomas De Mar | 16 | Son | — | Ohio |
| 29 | Edgar De Mar | 14 | Son | — | Ohio |
| 30 | John T. Laffey | 70 | Head | — | New York |
| 31 | Mary Frances Laffey | 44 | Daughter | Teacher | Ohio |
| 32 | Rose Laffey | 39 | Daughter | Teacher | Ohio |
| 33 | Frederick Laffey | 37 | Son | Proprietor | Ohio |
| 34 | Charles Laffey | 35 | Son | Delivery Man | Ohio |
| 35 | Joseph Martin | 46 | Head | Proprietor | Servia |
| 36 | Catherine Martin | 36 | Wife | Assistant | Servia |
| 37 | Joseph Jr. Martin | 13 | Son | — | Ohio |
| 38 | Robert Martin | 9 | Son | — | Ohio |
| 39 | Florence Rentinger | 71 | Head | Last Year Was Saleslady | Ohio |
| 40 | Louis O. Hiatt | 34 | Nephew | Yard Man | 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)