MD
Mary Davidson — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Clermont, Ohio
Our Model Tree links this Mary Davidson across the 1920 and 1930 US Censuses in Clermont, Ohio (XGBoost, ~Confirmed) — first a daughter (b.~1907), then head of a 15-person household.
Age 23
b. ~1907
Female
Daughter
Born: Ohio
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Clermont, Ohio |
| Surname | Davidson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Jackson Township |
| Est. Birth Year | ~1907 |
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.
15 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Helen Shields | Daughter | — | 3 | ~1927 |
| Mary Davidson | Daughter | — | 23 | ~1907 |
| Marie Shields | Daughter | — | 5 | ~1925 |
| Forest Shields | Head | — | 43 | ~1887 |
| Emma Shields | Other | — | 37 | ~1893 |
| Ellsworth Rigney | Other | — | 17 | ~1913 |
| William Thelton | Other | — | 13 | ~1917 |
| Goldina Davidson | Other | — | 54 | ~1876 |
| William Davidson | Other | — | 58 | ~1872 |
| Helen Carr | Other | — | 29 | ~1901 |
| Raymond Carr | Other | — | 28 | ~1902 |
| Billy Shields | Son | — | 1 | ~1929 |
| James Shields | Son | — | 11 | ~1919 |
| Charles Shields | Son | — | 7 | ~1923 |
| Ralph Shields | Son | — | 9 | ~1921 |
Census Appearances
1920
Clermont, Ohio
Daughter, age 13
Clermont, Ohio · implied b. ~1907 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Clermont, Ohio
Daughter, age 23
Clermont, Ohio · implied b. ~1907 — 15 household members
| Surname | Davidson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | none |
| Can Read/Write | Yes |
| 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 Davidson across 2 US Census years (1920 and 1930) in Clermont, Ohio, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Davidson
Daughter · 1930 · age 23 · b. ~1907 · Ohio
★ You are viewing this record
Sibling
Ralph Shields
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Shields
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Shields
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Shields
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Shields
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Billy Shields
Sibling · 1930 · age 1
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
1930 US Federal Census — Clermont, Ohio
Open full size
1930 US Federal Census — Clermont, Ohio
Page Contents
50 people indexed on this census page (ia:1930:ohiocensus00reel1757:1016)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ben Kirkaddon | 51 | Head | Car Repairer | Illinois |
| 2 | Nellie Kirkaddon | 40 | Wife-H | None | Ohio |
| 3 | Clarence Kirkaddon | 21 | Son | Clerk & Typist | Ohio |
| 4 | Dorothy Kirkaddon | 17 | Daughter | None | Ohio |
| 5 | Hazel Kirkaddon | 6 | Daughter | None | Ohio |
| 6 | James Kirkaddon | 77 | Father | None | Ohio |
| 7 | Stanley Ritt | 23 | Head | Laborer | Ohio |
| 8 | Lou Alice Ritt | 19 | Wife-H | None | Ohio |
| 9 | Earl Ritt | 0 | Son | None | Ohio |
| 10 | Charles Young | 39 | Head | Farmer | Ohio |
| 11 | Blanche Young | 30 | Wife-H | None | Ohio |
| 12 | Harold Young | 2 | Son | None | Ohio |
| 13 | Forest Shields | 43 | Head | Mechanic | Ohio |
| 14 | Emma Shields | 37 | Wife-H | None | Ohio |
| 15 | James Shields | 11 | Son | None | Ohio |
| 16 | Ralph Shields | 9 | Son | None | Ohio |
| 17 | Charles Shields | 7 | Son | None | Ohio |
| 18 | Marie Shields | 5 | Daughter | None | Ohio |
| 19 | Helen Shields | 3 | Daughter | None | Ohio |
| 20 | Billy Shields | 1 | Son | None | Ohio |
| 21 | William D. Davidson | 58 | O | Farmer | Ohio |
| 22 | Goldina Davidson | 54 | Wife-H | None | Ohio |
| 23 | Mary Davidson THIS PERSON | 23 | Daughter | None | Ohio |
| 24 | Raymond Carr | 28 | R | Farmer | Ohio |
| 25 | Helen Carr | 29 | Wife-H | None | Ohio |
| 26 | Ellsworth Rigney | 17 | Boarder | None | Ohio |
| 27 | William Thelton | 13 | Boarder | None | Ohio |
| 28 | James A. Hobson | 49 | Head | Carpenter | Ohio |
| 29 | Myrtle Hobson | 47 | Wife-H | None | Ohio |
| 30 | Allie Hobson | 11 | Daughter | None | Ohio |
| 31 | Lucille Hobson | 7 | Daughter | None | Ohio |
| 32 | Leslie Cramer | 34 | Head | Truck Driver | Ohio |
| 33 | Anna Cramer | 32 | Wife-H | None | Ohio |
| 34 | James Cramer | 7 | Son | None | Ohio |
| 35 | Doris Cramer | 3 | Daughter | None | Ohio |
| 36 | John R. Johnson | 81 | Head | None | New Jersey |
| 37 | Cora Johnson | 62 | Wife-H | None | Ohio |
| 38 | Grover Steward | 41 | Head | Salesman | Ohio |
| 39 | Nellie Steward | 39 | Wife-H | None | Ohio |
| 40 | Clara Steward | 14 | Daughter | None | Ohio |
| 41 | Joseph Curtis | 72 | Father-in-law | None | Ohio |
| 42 | Jerome Morgan | 61 | Head | Laborer | Ohio |
| 43 | Lizzie Morgan | 62 | Wife-H | None | Ohio |
| 44 | James Cluney | 55 | Head | Laborer | Ohio |
| 45 | Louise Cluney | 41 | Wife-H | None | Ohio |
| 46 | John Monjar | 72 | Head | Laborer | Ohio |
| 47 | Elizabeth Monjar | 61 | Wife-H | None | Ohio |
| 48 | Clarence L. Wamsley | 31 | Head | Minister | Ohio |
| 49 | Bernice Wamsley | 26 | Wife-H | None | Ohio |
| 50 | Elizabeth Melody | 82 | Head | None | Ohio |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)