JD
John Douglas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Henderson-County, Tennessee
Our Model Tree links this John Douglas across the 1920, 1930 and 1940 US Censuses in Henderson-County, Tennessee (XGBoost, ~Confirmed), with identified parents Granville & John — first a son (b.~1915), then head of a 4-person household.
Age 25
b. ~1915
Male
Son
Born: Tennessee
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Henderson-County, Tennessee |
| Surname | Douglas |
| Given Name | John M. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Tennessee |
| 1935 Residence (City) | Lexington |
| 1935 Residence (County) | Henderson |
| Additional Details | |
| Occupation | Dentist |
| Industry | Dentistry |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 1100 |
| Highest Grade | C 5 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Occupation | Dentist |
| Township / Ward | Lexington |
| Est. Birth Year | ~1915 |
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 |
|---|---|---|---|---|
| Mildred Douglas | Daughter | — | 23 | ~1917 |
| Alice Douglas | Daughter | — | 46 | ~1894 |
| Martha Douglas | Head | — | 70 | ~1870 |
| John Douglas | Son | — | 25 | ~1915 |
Census Appearances
1920
Henderson, Tennessee
Son, age 5
Henderson, Tennessee · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Douglass |
| Given Name | John M |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1930
Henderson, Tennessee
Son, age 15
Henderson, Tennessee · implied b. ~1915 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Douglas |
| Given Name | John M |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1940
Henderson-County, Tennessee
Son, age 25
Henderson-County, Tennessee · implied b. ~1915 — 4 household members
| Surname | Douglas |
| Given Name | John M. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Tennessee |
| 1935 Residence (City) | Lexington |
| 1935 Residence (County) | Henderson |
| Occupation | Dentist |
| Industry | Dentistry |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 1100 |
| Highest Grade | C 5 |
| 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 Douglas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Granville Douglas (~0.92 confidence) and father John Douglass (~0.92 confidence) and mother Martha Douglas (~0.92 confidence) and mother Martha Douglass (~0.92 confidence) and mother Martha Douglas (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Granville Douglas
b. ~1865
Source father
● Household
· direct · ~0.92
Father
John Douglass
b. ~1865
Source father
● Household
· direct · ~0.92
Mother
Martha Douglas
b. ~1870
Source mother
● Household
· direct · ~0.92
Mother
Martha Douglass
b. ~1870
Source mother
● Household
· direct · ~0.92
Mother
Martha Douglas
b. ~1870
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Douglas
Son · 1940 · age 25 · b. ~1915 · Tennessee
★ You are viewing this record
Sibling
Mildred Douglas
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Douglas
Sibling · 1940 · age 46
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 — Henderson-County, Tennessee
Open full size
1940 US Federal Census — Henderson-County, Tennessee
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03904-00286)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Colette C. Davis | 4 | daughter | — | No. Carolina |
| 2 | Charles P. Currier | 27 | Head | Store Manager | Tennessee |
| 3 | Margaret Currier | 25 | wife | — | Tennessee |
| 4 | Charles P. Iii Currier | 1 | son | — | Kentucky |
| 5 | Walter S. Winslow | 66 | Head | Carpenter | Tennessee |
| 6 | Lura Winslow | 67 | wife | — | Tennessee |
| 7 | Lura Jean Winslow | 11 | granddaughter | — | Tennessee |
| 8 | Linn G. Jones | 51 | Head | Prop. | Tennessee |
| 9 | Vashti Jones | 47 | wife | — | Tennessee |
| 10 | James W. Threadgill | 60 | Head | Manager | Tennessee |
| 11 | Ella Threadgill | 58 | wife | — | Tennessee |
| 12 | John Threadgill | 23 | son | — | Tennessee |
| 13 | Harold A. Threadgill | 16 | son | — | Tennessee |
| 14 | Colwell Mullins | 60 | in law | Carpenter | Tennessee |
| 15 | W. Leonard Pope | 32 | Head | Cashier | Alabama |
| 16 | Betty Lee Pope | 28 | wife | Deputy Clerk | Tennessee |
| 17 | William L. Jr. Pope | 9 | son | — | Tennessee |
| 18 | Betty Lee Pope | 1 | daughter | — | Tennessee |
| 19 | Georgia A. Griggs | 77 | Head | — | Tennessee |
| 20 | Eaco Dungberry | 57 | mother in law | Fireman | Tennessee |
| 21 | Lillian M. Dungberry | 47 | mother in law | — | Kentucky |
| 22 | Haliday L. Iv Short | 28 | Head | Assistant Tenant Purchase | Tennessee |
| 23 | Louise Short | 27 | wife | — | Tennessee |
| 24 | O. Henry Auston | 48 | Head | Office Manager | Tennessee |
| 25 | Washie V. Auston | 48 | wife | — | Kentucky |
| 26 | Mary V. Auston | 14 | daughter | — | Tennessee |
| 27 | Henry M. Auston | 11 | son | — | Tennessee |
| 28 | Holland H. Iv Threadgill | 57 | Head | Manager | Tennessee |
| 29 | Lala Threadgill | 47 | wife | — | Tennessee |
| 30 | W. Achilles Frazier | 73 | Head | — | Tennessee |
| 31 | Zola Frazier | 67 | wife | — | Tennessee |
| 32 | Lon Hall | 41 | son | Mechanic | Tennessee |
| 33 | Duncan A. Pruitt | 59 | Head | Merchant | Arkansas |
| 34 | Ruby F. Pruitt | 49 | wife | — | Tennessee |
| 35 | Martha J. Douglas | 70 | Head | — | Tennessee |
| 36 | Alice V. Douglas | 46 | daughter | — | Tennessee |
| 37 | John M. Douglas THIS PERSON | 25 | son | Dentist | Tennessee |
| 38 | Mildred Douglas | 23 | daughter | Teacher | Tennessee |
| 39 | Rena Maal Pierce | 25 | Head | Teacher | Tennessee |
| 40 | Robert E. Burnell | 32 | Head | County Agent | Tennessee |
Pedigree Summary
John + 2 siblings
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)