JD
John Davidson — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Boise, Idaho
Our Model Tree links this John Davidson across the 1920, 1930 and 1940 US Censuses in Boise, Idaho (XGBoost, ~Confirmed) — first a head (b.~1850), then head of a 3-person household.
Age 80
b. ~1850
Male
Head
Born: Scotland
Widowed
1930 Census Record Details
| Census Year | 1930 |
| Location | Boise, Idaho |
| Surname | Davidson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 80 |
| Marital Status | Widowed |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1868 |
| Age at First Marriage | 25 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Additional Details | |
| Occupation | Farmer |
| Industry | Mt ranch |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Veteran | No |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Farmer |
| Township / Ward | Horseshoe Bend Precinct |
| Est. Birth Year | ~1850 |
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.
3 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Davidson | Head | — | 80 | ~1850 |
| Andy Davidson | Son | — | 47 | ~1883 |
| Albert Davidson | Son | — | 50 | ~1880 |
Census Appearances
1920
Boise, Idaho
Head, age 69
Boise, Idaho · implied b. ~1851 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 69 |
| Marital Status | Married |
| Birthplace | Scotland |
| Year of Immigration | 1878 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Farmer |
| Industry | Stock Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth Country | Scotland |
| Year of Naturalization | 1898 |
| Birthplace (normalized) | scotland |
1930
Boise, Idaho
Head, age 80
Boise, Idaho · implied b. ~1850 — 3 household members
| Surname | Davidson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 80 |
| Marital Status | Widowed |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1868 |
| Age at First Marriage | 25 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Farmer |
| Industry | Mt ranch |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Veteran | No |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Boise-County, Idaho
Other, age 89
Boise-County, Idaho · implied b. ~1851 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | John |
| Relationship to Head | Father |
| Sex | M |
| Color / Race | White |
| Age | 89 |
| Marital Status | Widowed |
| Birthplace | Scotland |
| 1935 Residence (City) | Holcomb Precinct |
| 1935 Residence (County) | Boise |
| Naturalization Status | Naturalized |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 John Davidson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Davidson
Head · 1930 · age 80 · b. ~1850 · Idaho
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Boise, Idaho
Open full size
1930 US Federal Census — Boise, Idaho
Page Contents
50 people indexed on this census page (ia:1930:15thcensus396unit:0736)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William J Moore | 31 | Head | Fire Warden | Kansas |
| 2 | Violet E Moore | 27 | Wife | — | Idaho |
| 3 | Carol Eve Moore | 1 | daughter | — | Idaho |
| 4 | Floyd M Rudolph | 32 | Head | Farmer | Minnesota |
| 5 | Minnie B Rudolph | 28 | Wife | — | Missouri |
| 6 | Paul R Rudolph | 6 | son | — | Idaho |
| 7 | Don R Rudolph | 5 | son | — | Idaho |
| 8 | Dean R Rudolph | 3 | son | — | Idaho |
| 9 | Penny Bruce | 21 | Step son | None - Attends College | Arkansas |
| 10 | Clifford M Gardner | 45 | Head | Farmer | Wisconsin |
| 11 | Bertha Gardner | 42 | Wife | — | Utah |
| 12 | Elsie Gardner | 22 | daughter | None | Idaho |
| 13 | Laura Gardner | 20 | daughter | None | Idaho |
| 14 | Irene Gardner | 17 | daughter | None | Idaho |
| 15 | Bertha Gardner | 13 | daughter | None | Idaho |
| 16 | Clifford M Jr Gardner | 12 | son | None | Idaho |
| 17 | Clinton M Gardner | 10 | son | None | Idaho |
| 18 | Alafarata Gardner | 8 | daughter | None | Idaho |
| 19 | Alafarata L Gardner | 70 | Head | Farmer | Wisconsin |
| 20 | John Davidson THIS PERSON | 80 | Head | Farmer | Scotland |
| 21 | Albert Davidson | 50 | son | Farmer | Iowa |
| 22 | Andy Davidson | 47 | son | Farmer | Iowa |
| 23 | Louis G Nelson | 41 | Head | Farmer | Utah |
| 24 | Ella V Nelson | 34 | Wife | None | Utah |
| 25 | Lila Nelson | 14 | daughter | None | Montana |
| 26 | Maxine Nelson | 12 | daughter | None | Utah |
| 27 | June Nelson | 5 | daughter | None | Canada Eng |
| 28 | Donald Nelson | 2 | son | None | Idaho |
| 29 | Betty Lou Nelson | 0 | daughter | None | Idaho |
| 30 | George W Rudolph | 59 | Head | Farmer | Minnesota |
| 31 | Ella R Rudolph | 47 | Wife | None | Iowa |
| 32 | Frank Simpson | 53 | Head | Farmer | Kansas |
| 33 | Bell Simpson | 49 | Wife | None | California |
| 34 | Jack Simpson | 20 | son | Farmer | California |
| 35 | James Simpson | 17 | son | Farmer | California |
| 36 | Lucille Simpson | 15 | daughter | None | California |
| 37 | Ruby Simpson | 12 | daughter | None | California |
| 38 | Ernest Smith | 31 | Step son | Farmer | California |
| 39 | Mary Gardner | 38 | Head | Farmer | Idaho |
| 40 | Katherine Gardner | 15 | daughter | None | Idaho |
| 41 | Nathan Gardner | 9 | son | None | Idaho |
| 42 | Claude B Wiseman | 35 | Head | Farmer | Idaho |
| 43 | Marie S Wiseman | 28 | Wife | None | Oklahoma |
| 44 | Jesse W Gullisan | 41 | Head | Farmer | Nebraska |
| 45 | Oliver M Curtis | 63 | Head | Farmer | Michigan |
| 46 | Thomas G Curtis | 18 | son | None | Idaho |
| 47 | John Klan | 41 | Head | Farmer | Austria |
| 48 | John P Klan | 12 | son | None | Idaho |
| 49 | — | None | — | — | — |
| 50 | — | None | — | — | — |
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)