MU
Mary Underwood — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Butler-County, Ohio
Our Model Tree links this Mary Underwood across the 1930 and 1940 US Censuses in Butler-County, Ohio (XGBoost, ~Confirmed) — first a spouse (b.~1901), then head of a 8-person household.
Age 39
b. ~1901
Female
Spouse
Born: Kentucky
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Butler-County, Ohio |
| Surname | Underwood |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Lemon Township |
| 1935 Residence (County) | Butler |
| Additional Details | |
| Occupation | H |
| Industry | S |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | H |
| Township / Ward | Lemon Township |
| Est. Birth Year | ~1901 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Patricia Underwood | Daughter | — | ~1940 | |
| Marjorie Underwood | Daughter | — | 5 | ~1935 |
| John Underwood | Son | — | 12 | ~1928 |
| Eugene Underwood | Son | — | 10 | ~1930 |
| Mary Underwood | Spouse | — | 39 | ~1901 |
| Harold Underwood | Son | — | 3 | ~1937 |
| Ruthleen Underwood | Daughter | — | 16 | ~1924 |
| Bernice Underwood | Daughter | — | 18 | ~1922 |
Census Appearances
1930
Butler, Ohio
Spouse, age 28
Butler, Ohio · implied b. ~1902 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Underwood |
| Given Name | Mary E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Kentucky |
| Age at First Marriage | 18 |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Butler-County, Ohio
Spouse, age 39
Butler-County, Ohio · implied b. ~1901 — 8 household members
| Surname | Underwood |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Lemon Township |
| 1935 Residence (County) | Butler |
| Occupation | H |
| Industry | S |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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 Underwood across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Underwood
Spouse · 1940 · age 39 · b. ~1901 · Ohio
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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 — Butler-County, Ohio
Open full size
1940 US Federal Census — Butler-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03034-00202)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary Underwood THIS PERSON | 39 | Wife | H | Kentucky |
| 42 | Bernice Underwood | 18 | daughter | H | Ohio |
| 43 | Ruthleen Underwood | 16 | daughter | — | Ohio |
| 44 | John Underwood | 12 | son | — | Ohio |
| 45 | Eugene Underwood | 10 | son | — | Ohio |
| 46 | Marjorie Underwood | 5 | daughter | — | Ohio |
| 47 | Harold Underwood | 3 | son | — | Ohio |
| 48 | Patricia Lou Underwood | 0 | daughter | — | Ohio |
| 49 | William Henry Spence | 62 | Head | Machinist | Ohio |
| 50 | Stella Spence | 62 | Wife | H | Kansas |
| 51 | Robert Fisher | 30 | nephew | Paper Hanger | Ohio |
| 52 | Glendora Fisher | 30 | wife | H | Ohio |
| 53 | Donna Fisher | 11 | daughter | — | Ohio |
| 54 | Marcia Fisher | 7 | daughter | — | Ohio |
| 55 | Dan Fisher | 6 | son | — | Ohio |
| 56 | Sandra Fisher | 4 | daughter | — | Ohio |
| 57 | Janet Dailey | 89 | grandmother | — | Indiana |
| 58 | William Griffith | 54 | Head | H | Kentucky |
| 59 | Allie Griffith | 51 | Wife | Proprietor | Kentucky |
| 60 | Erv Hammond Kincart | 59 | brother-in-law | H | Kentucky |
| 61 | Lawrence Osborn | 31 | roomer | Painter | Virginia |
| 62 | Robert Conarroe | 30 | Head | Electrician | Ohio |
| 63 | Frances Conarroe | 28 | Wife | H | Kent |
| 64 | Dorothy Frances Conarroe | 0 | daughter | — | Ohio |
| 65 | James Ramsey | 37 | Head | Steel Worker | Kentucky |
| 66 | Georgia Ramsey | 31 | Wife | H | Kentucky |
| 67 | Janet Ramsey | 12 | daughter | — | Kentucky |
| 68 | Robert Ramsey | 8 | son | — | Ohio |
| 69 | Marion Good | 61 | Head | Manager | Ohio |
| 70 | Frances Good | 57 | Wife | H | Ohio |
| 71 | Mary Elizabeth Good | 20 | daughter | S | Ohio |
| 72 | Ulyss Springfield | 42 | Head | Steel Worker | Georgia |
| 73 | Martha Springfield | 38 | Wife | H | Kentucky |
| 74 | Mary Elizabeth Shires | 17 | daughter | — | Ohio |
| 75 | Paul Shires | 15 | son | — | Ohio |
| 76 | Jerry Shires | 8 | son | — | Ohio |
| 77 | Shirley Shires | 7 | daughter | — | Ohio |
| 78 | Phyllis Shires | 4 | daughter | — | Ohio |
| 79 | John E. Miller | 64 | Head | Carpenter | Ohio |
| 80 | Melissa Miller | 62 | Wife | H | Ohio |
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)