JD
James Davidson — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Columbiana, Ohio
Our Model Tree links this James Davidson across the 1920 and 1930 US Censuses in Columbiana, Ohio (XGBoost, ~Confirmed) — first a son (b.~1908), then head of a 17-person household.
Age 22
b. ~1908
Male
Son
Born: Ohio
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Columbiana, Ohio |
| Surname | Davidson |
| Given Name | James R |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Additional Details | |
| Occupation | Clerk |
| Industry | Oil Company |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Clerk |
| Township / Ward | Wellsville City |
| Est. Birth Year | ~1908 |
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.
17 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Anna Davidson | Daughter | — | 10 | ~1920 |
| Betty Oliver | Daughter | — | 14 | ~1916 |
| Ida Oliver | Daughter | — | 21 | ~1909 |
| Mary Davidson | Daughter | — | 25 | ~1905 |
| Margaret Oliver | Daughter | — | 19 | ~1911 |
| Rachel Oliver | Daughter | — | 25 | ~1905 |
| Pauline Davidson | Daughter | — | 29 | ~1901 |
| Jennie Oliver | Daughter | — | 15 | ~1915 |
| Catherine Oliver | Daughter | — | 18 | ~1912 |
| Immaculate Oliver | Head | — | 56 | ~1874 |
| Anna Davidson | Other | — | 66 | ~1864 |
| James Davidson | Other | — | 2 | ~1928 |
| John Davidson | Other | — | 5 | ~1925 |
| Harry Davidson | Other | — | 7 | ~1923 |
| James Davidson | Son | — | 22 | ~1908 |
| Harry Davidson | Son | — | 31 | ~1899 |
| Paul Oliver | Son | — | 32 | ~1898 |
Census Appearances
1920
Columbiana, Ohio
Son, age 11
Columbiana, Ohio · implied b. ~1909 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | James R |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Columbiana, Ohio
Son, age 22
Columbiana, Ohio · implied b. ~1908 — 17 household members
| Surname | Davidson |
| Given Name | James R |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Clerk |
| Industry | Oil Company |
| Class of Worker | W |
| 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 James Davidson across 2 US Census years (1920 and 1930) in Columbiana, Ohio, using XGBoost record linkage.
Show:
This person
Anchor record
James Davidson
Son · 1930 · age 22 · b. ~1908 · Ohio
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Sibling
Pauline Davidson
Sibling · 1930 · age 29
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Oliver
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ida Oliver
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Davidson
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rachel Oliver
Sibling · 1930 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jennie Oliver
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Oliver
Sibling · 1930 · age 32
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harry Davidson
Sibling · 1930 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Oliver
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Oliver
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Davidson
Sibling · 1930 · age 25
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 — Columbiana, Ohio
Open full size
1930 US Federal Census — Columbiana, Ohio
Page Contents
50 people indexed on this census page (ia:1930:ohiocensus00reel1760:0401)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Georgia M Madden | 16 | Daughter | — | Ohio |
| 52 | Robert E Madden | 10 | Son | — | Ohio |
| 53 | Henry E Miller | 23 | Head | Boilermaker | Pennsylvania |
| 54 | Alice L Miller | 21 | Daughter | — | Ohio |
| 55 | Joyce L Miller | 1 | Granddaughter | — | Ohio |
| 56 | Louise M Schmidt | 77 | Mother-in-law | — | Germany |
| 57 | Immaculate Oliver | 56 | Head | — | Italy |
| 58 | Paul Oliver | 32 | Son | Laborer | Ohio |
| 59 | Rachel Oliver | 25 | Daughter | — | Ohio |
| 60 | Ida M. Oliver | 21 | Daughter | Clerk | Ohio |
| 61 | Margaret Oliver | 19 | Daughter | Clerk | Ohio |
| 62 | Catherine Oliver | 18 | Daughter | — | Ohio |
| 63 | Jennie L. Oliver | 15 | Daughter | — | Ohio |
| 64 | Betty Oliver | 14 | Daughter | — | Ohio |
| 65 | Anna Davidson | 66 | — | — | Pennsylvania |
| 66 | James R Davidson THIS PERSON | 22 | Son | Clerk | Ohio |
| 67 | Mary W Davidson | 25 | Daughter | Decorator | Ohio |
| 68 | Pauline A Davidson | 29 | Daughter | Decorator | Ohio |
| 69 | Anna M Davidson | 10 | Daughter | — | Pennsylvania |
| 70 | Harry Davidson | 31 | Son | Rougher | Ohio |
| 71 | Harry Jr Davidson | 7 | Grandson | — | Ohio |
| 72 | John Davidson | 5 | Grandson | — | Ohio |
| 73 | James Davidson | 2 | Grandson | — | Ohio |
| 74 | Joseph Pugia | 44 | Head | Salesman | Italy |
| 75 | Lena Pugia | 37 | Wife-H | — | Pennsylvania |
| 76 | Joseph Jr Pugia | 5 | Son | — | Ohio |
| 77 | Angela Pugia | 72 | Mother | — | Italy |
| 78 | Guy Saponaro | 37 | Head | Proprietor | Italy |
| 79 | Isabella Saponaro | 31 | Wife-H | — | Illinois |
| 80 | Fred Robert E Patton | 49 | Head | Clerk | Pennsylvania |
| 81 | Helen B Patton | 44 | Wife-H | — | Ohio |
| 82 | Carl C Connor | 26 | Head | Machinist | Ohio |
| 83 | Pauline M Connor | 32 | Wife-H | — | Kentucky |
| 84 | Patricia R Connor | 2 | Daughter | — | Ohio |
| 85 | Myrtle B Connor | 30 | Sister-in-law | Waitress | Ohio |
| 86 | Florence F Hanlon | 59 | Head-H | — | West Virginia |
| 87 | William W. Hanlon | 18 | Son | — | Ohio |
| 88 | John Hanlon | 40 | Head | Machinist | Ohio |
| 89 | Della M Hanlon | 36 | Wife-H | — | Ohio |
| 90 | Betty C. Hanlon | 16 | Daughter | — | Ohio |
| 91 | Thelma L Hanlon | 11 | Son | — | Ohio |
| 92 | John G Hanlon | 6 | Son | — | Ohio |
| 93 | Ralph L Hanlon | 4 | Son | — | Ohio |
| 94 | Thomas O'Brien | 77 | Head | Yes | Scotland |
| 95 | Margaret O'Brien | 35 | Daughter | Teacher | Ohio |
| 96 | Mary E O'Brien | 30 | Daughter | Operator | Ohio |
| 97 | Joseph B Irwin | 79 | Boarder | — | Ohio |
| 98 | Charles O Waddell | 67 | Head | — | Maryland |
| 99 | Bertha L Waddell | 47 | Wife-H | — | Pennsylvania |
| 100 | John Waddell | 14 | Son | — | 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)