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John Blair — 1940 US Census Record
Model Tree available1940 United States Federal Census · Davidson-County, Tennessee
Our Model Tree links this John Blair across the 1920, 1930 and 1940 US Censuses in Davidson-County, Tennessee (XGBoost, ~Confirmed), with identified parents Edward & Lula — first a head (b.~1918), then head of a 3-person household.
Age 22
b. ~1918
Male
Head
Born: Tennessee
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Davidson-County, Tennessee |
| Surname | Blair |
| Given Name | John B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Tennessee |
| 1935 Residence (City) | Davidson |
| 1935 Residence (County) | Davidson |
| Additional Details | |
| Occupation | Machine operator |
| Industry | Shoe Factory |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 496 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Occupation | Machine Operator |
| Est. Birth Year | ~1918 |
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 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Blair | Head | — | 22 | ~1918 |
| John Blair | Son | — | ~1940 | |
| Evelyn Blair | Spouse | — | 19 | ~1921 |
Census Appearances
1920
Davidson, Tennessee
Son, age 1
Davidson, Tennessee · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | John T |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 1 |
| 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 11
Davidson, Tennessee · implied b. ~1919 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | John E. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| 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
Davidson-County, Tennessee
Head, age 22
Davidson-County, Tennessee · implied b. ~1918 — 3 household members
| Surname | Blair |
| Given Name | John B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Tennessee |
| 1935 Residence (City) | Davidson |
| 1935 Residence (County) | Davidson |
| Occupation | Machine operator |
| Industry | Shoe Factory |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 496 |
| Highest Grade | Hs 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 Blair across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Edward Blair (~0.92 confidence) and mother Lula Blair (~0.92 confidence) and father Edgar Blair (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Edward Blair
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Lula Blair
b. ~1884
Source mother
● Household
· direct · ~0.92
Father
Edgar Blair
b. ~1885
Source father
● Household
· direct · ~0.92
This person
Anchor record
John Blair
Head · 1940 · age 22 · b. ~1918 · 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 — 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-t0627-03886-00302)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Lillian Moore | 40 | Housekeeper | Housekeeper | Tennessee |
| 42 | C. Ewald King | 27 | Head | Steward | Tennessee |
| 43 | Mildred S. King | 21 | Wife | — | Tennessee |
| 44 | Norta L. King | 3 | Daughter | — | Tennessee |
| 45 | J. Dale King | 42 | Head | Rate Clerk | Tennessee |
| 46 | Pauline King | 36 | Sister | Stenographer | Tennessee |
| 47 | Clarence C. Thacker | 54 | Head | Secretary | Tennessee |
| 48 | Ida Thacker | 55 | Wife | — | Tennessee |
| 49 | Mary J. Thacker | 29 | Daughter | Record Clerk | Tennessee |
| 50 | Doris G. Hadaway | 37 | Head | Secretary | Tennessee |
| 51 | A. Janette Hadaway | 8 | Daughter | — | Tennessee |
| 52 | L. Hall Jr. Hadaway | 6 | Son | — | Tennessee |
| 53 | John B. Blair THIS PERSON | 22 | Head | Machine Operator | Tennessee |
| 54 | Evelyn Blair | 19 | Wife | — | Tennessee |
| 55 | John B. Jr. Blair | 0 | Son | — | Tennessee |
| 56 | Bertie S. Jackson | 86 | Head | — | Illinois |
| 57 | Effie N. Jackson | 57 | Wife | — | Tennessee |
| 58 | Dorothea Jackson | 32 | Daughter | Attendant | Tennessee |
| 59 | J. Ewing Nicholson | 34 | Head | Treasurer | Tennessee |
| 60 | Jessie D. Nicholson | 37 | Wife | — | Tennessee |
| 61 | Catherine A. Simpson | 30 | Sister-in-law | Stenographer | Tennessee |
| 62 | Alex J. Fowler | 60 | Head | Supervisor | Tennessee |
| 63 | Allie W. Fowler | 56 | Wife | — | Tennessee |
| 64 | Francis L. Fly | 23 | Head | Substitute Letter Carrier | Tennessee |
| 65 | Christine P. Fly | 25 | Wife | File Clerk | Tennessee |
| 66 | Terrence W. Young | 58 | Head | Field Supervisor | Tennessee |
| 67 | Nellie E. Young | 57 | Wife | — | Tennessee |
| 68 | Terrence W. Jr. Young | 30 | Son | Central Office Repairman | Tennessee |
| 69 | Geraldine G. Young | 30 | Daughter-in-law | — | Tennessee |
| 70 | Greta E. Young | 9 | Granddaughter | — | Tennessee |
| 71 | Wendell S. Cook | 46 | Head | Owner | Tennessee |
| 72 | Katherine E. Cook | 37 | Wife | — | Tennessee |
| 73 | Wendell S. Jr. Cook | 11 | Son | — | Tennessee |
| 74 | Norman S. Morgan | 24 | Head | Shoe Cutter | Tennessee |
| 75 | Pauline M. Morgan | 25 | Wife | Jr. Clerk Stenographer | Tennessee |
| 76 | James Palmer | 52 | Head | Superintendent | N. Ireland |
| 77 | Agnes M. Palmer | 42 | Wife | — | N. Ireland |
| 78 | Lillian J. Palmer | 21 | Daughter | — | N. Ireland |
| 79 | Elizabeth S. Benton | 32 | Lodger | Sales Lady | Tennessee |
Pedigree Summary
John
Gen 1 · 3 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)