JD
James Davidson — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cambria, Pennsylvania
Our Model Tree links this James Davidson across the 1930 and 1940 US Censuses in Cambria, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1922), then head of a 9-person household.
Age 8
b. ~1922
Male
Son
Born: Pennsylvania
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cambria, Pennsylvania |
| Surname | Davidson |
| Given Name | James P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Additional Details | |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Portage Borough |
| Est. Birth Year | ~1922 |
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 1930 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Betty Davidson | Daughter | — | 3 | ~1927 |
| Violet Davidson | Daughter | — | 15 | ~1915 |
| John Davidson | Head | — | 45 | ~1885 |
| Blanche Davidson | Other | — | 41 | ~1889 |
| James Davidson | Son | — | 8 | ~1922 |
| Charles Davidson | Son | — | 16 | ~1914 |
| John Davidson | Son | — | 12 | ~1918 |
| Ralph Davidson | Son | — | 10 | ~1920 |
| Alvin Davidson | Son | — | 7 | ~1923 |
Census Appearances
1930
Cambria, Pennsylvania
Son, age 8
Cambria, Pennsylvania · implied b. ~1922 — 9 household members
| Surname | Davidson |
| Given Name | James P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Cambria-County, Pennsylvania
Son, age 19
Cambria-County, Pennsylvania · implied b. ~1921 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | Jack |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Benedict |
| 1935 Residence (County) | Cambria |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Davidson
Son · 1930 · age 8 · b. ~1922 · Pennsylvania
★ You are viewing this record
Sibling
Ralph Davidson
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Davidson
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Davidson
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Violet Davidson
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Davidson
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alvin Davidson
Sibling · 1930 · age 7
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 — Cambria, Pennsylvania
Open full size
1930 US Federal Census — Cambria, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1930:fifteenthcensus00reel2013:0600)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Anthony Reale | 17 | Son | — | Pennsylvania |
| 52 | John Reale | 13 | Son | — | Pennsylvania |
| 53 | Constance Reale | 7 | Daughter | — | Pennsylvania |
| 54 | John Eligens | 41 | Head | Pick Miner | Hungary |
| 55 | Mary Eligens | 32 | Wife-H | — | Hungary |
| 56 | M. Madeline Eligens | 16 | Daughter | — | Pennsylvania |
| 57 | Margaret Eligens | 15 | Daughter | — | Pennsylvania |
| 58 | Helen Eligens | 13 | Daughter | — | Pennsylvania |
| 59 | Mary Eligens | 11 | Daughter | — | Pennsylvania |
| 60 | John Eligens | 8 | Son | — | Pennsylvania |
| 61 | Elizabeth Eligens | 6 | Daughter | — | Pennsylvania |
| 62 | Andrew Bolha | 45 | Head | Pick Miner | Hungary |
| 63 | Susan Bolha | 36 | Wife-H | — | Hungary |
| 64 | William Bolha | 14 | Son | — | Pennsylvania |
| 65 | Samuel Tomaselli | 32 | Head | Cobbler | Italy |
| 66 | Agnes Tomaselli | 19 | Wife-H | — | Pennsylvania |
| 67 | Anthony J. Tomaselli | 1 | Son | — | Pennsylvania |
| 68 | Stephen Molnar | 30 | Head | Pick Miner | Hungary |
| 69 | Julia Molnar | 27 | Wife-H | — | Hungary |
| 70 | Stephen Jr. Molnar | 9 | Son | — | Pennsylvania |
| 71 | Ethel Molnar | 7 | Daughter | — | Pennsylvania |
| 72 | George Molnar | 3 | Son | — | Pennsylvania |
| 73 | John Jr. Haas | 56 | Head-H | Retired Disabled | Germany |
| 74 | Mary Haggan | 39 | Head | — | Pennsylvania |
| 75 | William Haggan | 10 | Son | — | Pennsylvania |
| 76 | James Haggan | 9 | Son | — | Pennsylvania |
| 77 | William Seabolt | 34 | Boarder | Pick Miner | Pennsylvania |
| 78 | Stewart M. Mears | 49 | Head | Bridge Inspector | Pennsylvania |
| 79 | Kate D. Mears | 50 | Wife-H | — | Pennsylvania |
| 80 | Catherine M. Mears | 17 | Daughter | — | Pennsylvania |
| 81 | Fay A. Mears | 9 | Daughter | — | Pennsylvania |
| 82 | Gilbert Kunsman | 23 | Head | Salesman | Pennsylvania |
| 83 | Mary Kunsman | 23 | Wife-H | — | Pennsylvania |
| 84 | John Davidson | 45 | Head | Laborer | Pennsylvania |
| 85 | Blanche Davidson | 41 | Wife-H | — | Pennsylvania |
| 86 | Charles M. Davidson | 16 | Son | — | Pennsylvania |
| 87 | Violet M. Davidson | 15 | Daughter | — | Pennsylvania |
| 88 | John W. Davidson | 12 | Son | — | Pennsylvania |
| 89 | Ralph L. Davidson | 10 | Son | — | Pennsylvania |
| 90 | James P. Davidson THIS PERSON | 8 | Son | — | Pennsylvania |
| 91 | Alvin L. Davidson | 7 | Son | — | Pennsylvania |
| 92 | Betty J. Davidson | 3 | Daughter | — | Pennsylvania |
| 93 | Joseph Warner | 21 | Head | Car Shifter | Pennsylvania |
| 94 | Mary Warner | 18 | Wife-H | — | Pennsylvania |
| 95 | Dorothy Warner | 42 | Mother | — | Pennsylvania |
| 96 | Vincent Warner | 22 | Head | Track Laborer | Pennsylvania |
| 97 | Mabel Warner | 23 | Wife-H | — | Pennsylvania |
| 98 | Dorothy Warner | 5 | Daughter | — | Pennsylvania |
| 99 | Gladys Warner | 4 | Daughter | — | Pennsylvania |
| 100 | Elda Warner | 1 | Daughter | — | Pennsylvania |
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)