JD
John Davidson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Hardin-County, Tennessee
Our Model Tree links this John Davidson across the 1920, 1930 and 1940 US Censuses in Hardin-County, Tennessee (XGBoost, ~Confirmed), with identified parents Barney & Nora — first a head (b.~1912), then head of a 4-person household.
Age 28
b. ~1912
Male
Head
Born: Tennessee
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Hardin-County, Tennessee |
| Surname | Davidson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Tennessee |
| 1935 Residence (City) | 10th District |
| 1935 Residence (County) | Hardin |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | OA |
| Hours Worked | 30 |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Occupation | Farmer |
| Township / Ward | 10Th District |
| Est. Birth Year | ~1912 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Bettie Davidson | Daughter | — | 2 | ~1938 |
| John Davidson | Head | — | 28 | ~1912 |
| Bobby Davidson | Son | — | 4 | ~1936 |
| Bertie Davidson | Spouse | — | 25 | ~1915 |
Census Appearances
1920
Hardin, Tennessee
Son, age 9
Hardin, Tennessee · implied b. ~1911 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | John W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Speaks English | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1930
Hardin, Tennessee
Son, age 19
Hardin, Tennessee · implied b. ~1911 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Occupation | Farm laborer |
| Industry | General farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1940
Hardin-County, Tennessee
Head, age 28
Hardin-County, Tennessee · implied b. ~1912 — 4 household members
| Surname | Davidson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Tennessee |
| 1935 Residence (City) | 10th District |
| 1935 Residence (County) | Hardin |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | OA |
| Hours Worked | 30 |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
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. Identified parents: father Barney Davidson (~0.92 confidence) and mother Nora Davidson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Barney Davidson
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Nora Davidson
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Davidson
Head · 1940 · age 28 · b. ~1912 · Tennessee
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Hardin-County, Tennessee
Open full size
1940 US Federal Census — Hardin-County, Tennessee
Page Contents
14 people indexed on this census page (nara:1940:m-t0627-03901-00035)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mamie Copeland | 32 | Wife | — | Tennessee |
| 42 | Pauline Copeland | 13 | Daughter | — | Tennessee |
| 43 | Douglas Copeland | 10 | Son | — | Tennessee |
| 44 | Kenneth Copeland | 8 | Son | — | Tennessee |
| 45 | Harbid | Harbie Copeland | 2 | Son | — | Tennessee |
| 46 | Burnice Cagle | 27 | Head | Farmer | Tennessee |
| 47 | Mabel Cagle | 19 | Wife | — | Tennessee |
| 48 | John Smith | 77 | Head | — | Tennessee |
| 49 | Efford | Efford Smith | 30 | Son | Farmer | Tennessee |
| 50 | Kathleen Smith | 31 | Daughter | — | Tennessee |
| 51 | John Davidson THIS PERSON | 28 | Head | Farmer | Tennessee |
| 52 | Bertie Davidson | 25 | Wife | — | Tennessee |
| 53 | Bobby Royce Davidson | 4 | Son | — | Tennessee |
| 54 | Bettie Davidson | 2 | Daughter | — | Tennessee |
Pedigree Summary
John
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)