JD
John Davidson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Davidson-County, Tennessee
Our Model Tree links this John Davidson across the 1920, 1930 and 1940 US Censuses in Davidson-County, Tennessee (XGBoost, ~Confirmed), with identified parents John & John — first a son (b.~1917), then head of a 4-person household.
Age 23
b. ~1917
Male
Son
Born: Tennessee
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Davidson-County, Tennessee |
| Surname | Davidson |
| Given Name | John W. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Tennessee |
| 1935 Residence (City) | Nashville |
| 1935 Residence (County) | Davidson |
| Additional Details | |
| Occupation | Apprentice Machinist |
| Industry | Railroad |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 884 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Occupation | Apprentice Machinist |
| Township / Ward | Nashville |
| Est. Birth Year | ~1917 |
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 |
|---|---|---|---|---|
| John Davidson | Head | — | 49 | ~1891 |
| John Davidson | Son | — | 23 | ~1917 |
| Thomas Davidson | Son | — | 18 | ~1922 |
| Mamie Davidson | Spouse | — | 46 | ~1894 |
Census Appearances
1920
Davidson, Tennessee
Son, age 2
Davidson, Tennessee · implied b. ~1918 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | John W Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1930
Davidson, Tennessee
Son, age 13
Davidson, Tennessee · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | John H. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Can Read/Write | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1940
Davidson-County, Tennessee
Son, age 23
Davidson-County, Tennessee · implied b. ~1917 — 4 household members
| Surname | Davidson |
| Given Name | John W. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Tennessee |
| 1935 Residence (City) | Nashville |
| 1935 Residence (County) | Davidson |
| Occupation | Apprentice Machinist |
| Industry | Railroad |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 884 |
| Highest Grade | H 4 |
| 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 John Davidson (~0.92 confidence) and father John Davidson (~0.92 confidence) and mother Mamie Davidson (~0.92 confidence) and father John Davidson (~0.92 confidence) and mother Mamie Davidson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Davidson
b. ~1891
Source father
● Household
· direct · ~0.92
Father
John Davidson
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
Mamie Davidson
b. ~1894
Source mother
● Household
· direct · ~0.92
Father
John Davidson
b. ~1896
Source father
● Household
· direct · ~0.92
Mother
Mamie Davidson
b. ~1896
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Davidson
Son · 1940 · age 23 · b. ~1917 · Tennessee
★ You are viewing this record
Sibling
Thomas Davidson
Sibling · 1940 · age 18
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
1940 US Federal Census — Davidson-County, Tennessee
Open full size
1940 US Federal Census — Davidson-County, Tennessee
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03972-00256)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Glen P. Rose | 42 | Lodger | Miner | Michigan |
| 42 | Vincent Doyle | 33 | Head | — | France |
| 43 | Yvonne Doyle | 25 | Wife | — | Minnesota |
| 44 | Henry C. Patterson | 53 | Head | Lawyer | California |
| 45 | Lilian B. Patterson | 44 | Wife | — | Tennessee |
| 46 | Anna B. Lemons | 34 | Head | — | Tennessee |
| 47 | George W. Lemons | 20 | Son | Clerk | Tennessee |
| 48 | Will Stephenson | 58 | Head | — | Kentucky |
| 49 | Maude Stephenson | 52 | Wife | — | Kentucky |
| 50 | Mildred Stephenson | 34 | Daughter | Repair Work | Kentucky |
| 51 | Herman B. Stephenson | 32 | Son | Packer | Kentucky |
| 52 | Evelyn E. Stephenson | 23 | Daughter | Secretary | Kentucky |
| 54 | Jerry P. Mahoney | 50 | Head | Ticket Agent | Tennessee |
| 55 | Mary A. Mahoney | 52 | Sister | — | Tennessee |
| 56 | Edmund A. Mahoney | 33 | Brother | Plumber | Tennessee |
| 57 | Josephine Ferguson | 45 | Sister | Saleslady | Tennessee |
| 58 | William H. Barkette | 43 | Head | Truck Driver | Tennessee |
| 59 | Martha Barkette | 44 | Wife | — | Tennessee |
| 60 | Lee W. Plumley | 52 | Head | Pilot | Tennessee |
| 61 | Daisy Plumley | 56 | Wife | — | Tennessee |
| 62 | Jack Kingrey | 28 | Head | Automobile Painter | Kentucky |
| 63 | Evelyn Kingrey | 22 | Wife | — | Tennessee |
| 64 | James L. Kingrey | 2 | Son | — | Tennessee |
| 65 | Hugh Anna Price | 69 | Head | — | Kentucky |
| 66 | Jack Daugherty | 18 | Head | Messenger | Tennessee |
| 67 | Jennie Daugherty | 17 | Wife | — | Kentucky |
| 68 | Lula B. Ponce | 60 | Head | Owner | Tennessee |
| 69 | Walter B. Hudson | 54 | Head | Salesman | Georgia |
| 70 | Mattie B. Hudson | 55 | Wife | — | Georgia |
| 71 | Dorothy Turner | 19 | Head | Waitress | Tennessee |
| 72 | Cameron Farrell | 34 | Head | Owner | Tennessee |
| 73 | Elizabeth Farrell | 33 | Wife | Bookkeeper | Tennessee |
| 74 | John W. Davidson | 49 | Head | Engineer | Tennessee |
| 75 | Mamie Davidson | 46 | Wife | — | Tennessee |
| 76 | John W. Jr. Davidson THIS PERSON | 23 | Son | Apprentice Machinist | Tennessee |
| 77 | Thomas S. Davidson | 18 | Son | — | Tennessee |
| 78 | John Lynch | 75 | Head | — | Tennessee |
| 79 | Eliza A. Lynch | 75 | Wife | — | Tennessee |
| 80 | William H. Lynch | 52 | Son | Druggist | Tennessee |
Pedigree Summary
John + 1 sibling
Gen 1 · 5 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)