MF
Mary Finn — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lucas-County, Ohio
Our Model Tree links this Mary Finn across the 1930 and 1940 US Censuses in Lucas-County, Ohio (XGBoost, ~Confirmed) — first a daughter (b.~1916), then head of a 9-person household.
Age 24
b. ~1916
Female
Daughter
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lucas-County, Ohio |
| Surname | Finn |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Toledo City |
| 1935 Residence (County) | Lucas |
| Additional Details | |
| Occupation | office clerk |
| Industry | Textile Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Office Clerk |
| Township / Ward | Toledo City |
| Est. Birth Year | ~1916 |
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 |
|---|---|---|---|---|
| Mary Finn | Daughter | — | 24 | ~1916 |
| Paul Finn | Son | — | 21 | ~1919 |
| John Finn | Son | — | 23 | ~1917 |
| Ann Finn | Daughter | — | 28 | ~1912 |
| Edward Finn | Son | — | 26 | ~1914 |
| Eugene Finn | Son | — | 11 | ~1929 |
| George Finn | Son | — | 16 | ~1924 |
| Gertrude Finn | Daughter | — | 5 | ~1935 |
| Christine Finn | Head | — | 51 | ~1889 |
Census Appearances
1930
Lucas, Ohio
Daughter, age 13
Lucas, Ohio · implied b. ~1917 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Finn |
| Given Name | Marcellen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Kansas |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Lucas-County, Ohio
Daughter, age 24
Lucas-County, Ohio · implied b. ~1916 — 9 household members
| Surname | Finn |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Toledo City |
| 1935 Residence (County) | Lucas |
| Occupation | office clerk |
| Industry | Textile Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 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 Finn across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Finn
Daughter · 1940 · age 24 · b. ~1916 · Ohio
★ You are viewing this record
Sibling
Paul Finn
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gertrude Finn
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Finn
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ann Finn
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugene Finn
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Finn
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Finn
Sibling · 1940 · age 26
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 — Lucas-County, Ohio
Open full size
1940 US Federal Census — Lucas-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03262-00186)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Milla, Margaret A Miller | 62 | wife | — | Michigan |
| 42 | Margaret A Miller | 22 | daughter | — | Michigan |
| 43 | Leroy J. Domingo | 39 | Head | Manager | Pennsylvania |
| 44 | Mary E. Domingo | 37 | Wife | — | Pennsylvania |
| 45 | Florence M. Domingo | 20 | Daughter | — | Ohio |
| 46 | Martin E. Domingo | 74 | Father | — | Michigan |
| 47 | William E Jarvis | 42 | head | Tile Contractor | Michigan |
| 48 | Frida L. Jarvis | 40 | wife | — | Michigan |
| 49 | Ruth E Frye | 43 | head | — | Indiana |
| 50 | Gerald F. Mccoy | 31 | Head | Proprietor | Ohio |
| 51 | Doris L. Mccoy | 29 | Wife | — | Ohio |
| 52 | Charles F. G. Hoopes | 57 | head | Watchman | Maryland |
| 53 | Lillian Hoopes | 57 | wife | — | England |
| 54 | Homer Foster Shelly | 24 | head | Accountant | Ohio |
| 55 | Violet Grace Shelly | 21 | wife | Stenographer | Ohio |
| 56 | Clyde V. Karrick | 26 | Head | Machine Operator | Ohio |
| 57 | Helen Karrick | 20 | wife | — | Ohio |
| 58 | George L. Bennett | 60 | Head | — | W. Carolina |
| 59 | Rose Anna Bennett | 54 | wife | — | W. Virginia |
| 60 | Margaret Bennett | 17 | daughter | — | Ohio |
| 61 | Ruth Bennett | 15 | daughter | — | Ohio |
| 62 | Raymond Bennett | 13 | son | — | Ohio |
| 63 | Imogene Thomson | 17 | niece | — | Ohio |
| 64 | Christine Finn | 51 | head | — | New York |
| 65 | Ann Finn | 28 | daughter | — | New York |
| 66 | Edward Finn | 26 | son | R. Nurse | Ohio |
| 67 | Mary Finn THIS PERSON | 24 | daughter | Office Clerk | Ohio |
| 68 | John (At) Finn | 23 | son | Road Construction | Ohio |
| 69 | Paul Finn | 21 | son | Interior Decorator | Ohio |
| 70 | George Finn | 16 | son | — | Ohio |
| 71 | Eugene Finn | 11 | son | — | Ohio |
| 72 | Gertrude Finn | 5 | daughter | — | Ohio |
| 73 | Elsa Metzinger | 65 | head | — | Ohio |
| 74 | Cora Metzinger | 63 | wife | — | Ohio |
| 75 | Charles H Carter | 67 | head | Salesman | Ohio |
| 76 | Mae B Carter | 61 | wife | — | Illinois |
| 77 | Harold Fornaught | 30 | head | Assembler | Ohio |
| 78 | Bernice Fornaught | 29 | wife | — | Ohio |
| 79 | Bernice Temple | 29 | sister-in-law | Waitress | Ohio |
| 80 | Isabel Hoyt | 40 | head | School Teacher | Wisconsin |
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)