MR
Mary Regan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hamilton-County, Ohio
Our Model Tree links this Mary Regan across the 1930 and 1940 US Censuses in Hamilton-County, Ohio (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 9-person household.
Age 13
b. ~1927
Female
Daughter
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hamilton-County, Ohio |
| Surname | Regan |
| Given Name | Mary C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Cincinnati |
| 1935 Residence (County) | Hamilton |
| Additional Details | |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Cincinnati |
| Est. Birth Year | ~1927 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Cornelius Regan | Head | — | 40 | ~1900 |
| Dorothy Regan | Daughter | — | 12 | ~1928 |
| Catherine Niehaus | Other | — | 68 | ~1872 |
| Catherine Regan | Spouse | — | 39 | ~1901 |
| Alice Regan | Daughter | — | 8 | ~1932 |
| Richard Regan | Son | — | 3 | ~1937 |
| Mary Regan | Daughter | — | 13 | ~1927 |
| Ruth Regan | Daughter | — | 11 | ~1929 |
| Margaret Regan | Daughter | — | 9 | ~1931 |
Census Appearances
1930
Hamilton, Ohio
Daughter, age 3
Hamilton, Ohio · implied b. ~1927 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Regan |
| Given Name | Mary K. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Hamilton-County, Ohio
Daughter, age 13
Hamilton-County, Ohio · implied b. ~1927 — 9 household members
| Surname | Regan |
| Given Name | Mary C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Cincinnati |
| 1935 Residence (County) | Hamilton |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| 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 Regan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Regan
Daughter · 1940 · age 13 · b. ~1927 · Ohio
★ You are viewing this record
Sibling
Alice Regan
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Regan
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Regan
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Regan
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Regan
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 — Hamilton-County, Ohio
Open full size
1940 US Federal Census — Hamilton-County, Ohio
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03199-00829)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank Berning | 60 | Head | Motorman | Ohio |
| 2 | Alma Berning | 58 | Wife | — | Ohio |
| 3 | Charles Wittrock | 62 | Brother in law | — | Ohio |
| 4 | Augusta Wittrock | 60 | Sister in law | Manager | Ohio |
| 5 | Cornelius Regan | 40 | Head | Machinist | Ohio |
| 6 | Catherine Regan | 39 | Wife | — | Ohio |
| 7 | Mary C. Regan THIS PERSON | 13 | Daughter | — | Ohio |
| 8 | Dorothy Regan | 12 | Daughter | — | Ohio |
| 9 | Ruth Regan | 11 | Daughter | — | Ohio |
| 10 | Margaret Regan | 9 | Daughter | — | Ohio |
| 11 | Alice Regan | 8 | Daughter | — | Ohio |
| 12 | Richard Regan | 3 | Son | — | Ohio |
| 13 | Catherine Niehaus | 68 | Mother in law | — | Indiana |
| 14 | Frank Murphy | 53 | Head | Storekeeper | Ohio |
| 15 | Alice Murphy | 50 | Wife | — | Ohio |
| 17 | William H. Doolan | 53 | Head | Florist | Ohio |
| 18 | Florence Doolan | 42 | Wife | — | Ohio |
| 19 | Robert H. Doolan | 23 | Son | Clerk | Ohio |
| 20 | George Henzel | 32 | Head | Attendant | Ohio |
| 21 | Margaret Henzel | 32 | Wife | — | Ohio |
| 22 | Joseph Perry | 70 | Head | — | Kentucky |
| 23 | George R. Perry | 31 | Son | — | Ohio |
| 24 | Norbert H. Perry | 30 | Son | Clerk | Ohio |
| 25 | Clarence W. Perry | 23 | Son | Laborer | Ohio |
| 26 | Edward Morgan | 69 | Head | — | Ohio |
| 27 | Marie Morgan | 62 | Wife | — | Ohio |
| 28 | Paul Morgan | 20 | Son | Clerk | Ohio |
| 29 | Hermann Plugge | 48 | Nephew | Clerk | Ohio |
| 30 | Joseph Angilo | 48 | Head | Helper | Italy |
| 31 | Mamie Angilo | 50 | Wife | — | Kentucky |
| 32 | John Angilo | 9 | Daughter | — | Ohio |
| 33 | William Reder | 65 | Head | Laborer | Ohio |
| 34 | Carrie Reder | 68 | Wife | — | Germany |
| 35 | Carolyn Reder | 17 | Daughter | — | Ohio |
| 36 | William Jr. Reder | 36 | Head | Mail Carrier | Ohio |
| 37 | Elizabeth Reder | 27 | Wife | — | Kentucky |
| 38 | William S. Reder | 3 | Son | — | Ohio |
| 39 | Elizabeth C. Reder | 2 | Daughter | — | Ohio |
| 40 | Joseph H. Reder | 1 | 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)