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John Blair — 1940 US Census Record
Linked across censuses1940 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) — first a head (b.~1863), then head of a 3-person household.
Age 77
b. ~1863
Male
Head
Born: Tennessee
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Davidson-County, Tennessee |
| Surname | Blair |
| Given Name | John M. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 77 |
| Marital Status | Married |
| Birthplace | Tennessee |
| 1935 Residence (City) | 3 District |
| 1935 Residence (County) | Davidson |
| Additional Details | |
| Industry | 0 |
| Class of Worker | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Township / Ward | 3 District |
| Est. Birth Year | ~1863 |
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 | — | 77 | ~1863 |
| Vernon Blair | Son | — | 50 | ~1890 |
| Mollie Blair | Spouse | — | 75 | ~1865 |
Census Appearances
1920
Davidson, Tennessee
Head, age 62
Davidson, Tennessee · implied b. ~1858 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1930
Davidson, Tennessee
Head, age 67
Davidson, Tennessee · implied b. ~1863 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | John M. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 67 |
| Marital Status | Married |
| Birthplace | Tennessee |
| Age at First Marriage | 24 |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Occupation | Guard |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 2000 |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1940
Davidson-County, Tennessee
Head, age 77
Davidson-County, Tennessee · implied b. ~1863 — 3 household members
| Surname | Blair |
| Given Name | John M. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 77 |
| Marital Status | Married |
| Birthplace | Tennessee |
| 1935 Residence (City) | 3 District |
| 1935 Residence (County) | Davidson |
| Industry | 0 |
| Class of Worker | 0 |
| Highest Grade | No 7 |
| 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.
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This person
Anchor record
John Blair
Head · 1940 · age 77 · b. ~1863 · Tennessee
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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
40 people indexed on this census page (nara:1940:m-t0627-03884-00231)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jane Pinkelton | 75 | Head | — | Tennessee |
| 42 | Lonnie Pinkelton | 39 | Son | Farmer | Tennessee |
| 43 | Minnie Pinkelton | 40 | Daughter in law | — | Tennessee |
| 44 | Allen Pinkelton | 3 | Grandson | — | Tennessee |
| 45 | Louise King | 17 | Step daughter | — | Tennessee |
| 46 | Clayton J. Hale | 28 | Head | Clerk | Georgia |
| 47 | Jerry C. Hale | 1 | Son | — | Georgia |
| 48 | Larry W. Hale | 0 | Son | — | Georgia |
| 49 | Arthur R. Cross | 39 | Head | Assistant Custodian | Tennessee |
| 50 | Frances Cross | 34 | Wife | — | Tennessee |
| 51 | Nettie A. Cross | 13 | Daughter | — | Tennessee |
| 52 | Robert M. Cross | 10 | Son | — | Tennessee |
| 53 | James E. Cross | 8 | Son | — | Tennessee |
| 54 | Margaret Cross | 5 | Daughter | — | Tennessee |
| 55 | Robert Cross | 62 | Father | Farmer | Tennessee |
| 56 | Connie Pulley | 43 | Head | — | Tennessee |
| 57 | Ewing Pulley | 22 | Son | Finisher | Tennessee |
| 58 | Frances Pulley | 15 | Daughter | — | Tennessee |
| 59 | Edward Pulley | 13 | Son | — | Tennessee |
| 60 | John M. Blair THIS PERSON | 77 | Head | — | Tennessee |
| 61 | Mollie Blair | 75 | Wife | — | Tennessee |
| 62 | Vernon R. Blair | 50 | Son | Carpenter | Tennessee |
| 63 | William H. Blair | 73 | Head | Farmer | Tennessee |
| 64 | Emma Blair | 74 | Wife | — | Tennessee |
| 65 | Walter Blair | 36 | Son | Shipping Clerk | Tennessee |
| 66 | Dudley Blair | 35 | Son | Clerk | Tennessee |
| 67 | Ray Malone | 45 | Head | Farmer | Tennessee |
| 68 | Flora Malone | 43 | Wife | — | Tennessee |
| 69 | Nancy Malone | 21 | Daughter | — | Tennessee |
| 70 | Eleanor Malone | 17 | Daughter | — | Tennessee |
| 71 | Donald Malone | 12 | Son | — | Tennessee |
| 72 | Nannie W. Pulley | 66 | Mother in law | — | Tennessee |
| 73 | Orien L. Maggoner | 45 | Head | Farmer | Tennessee |
| 74 | Edna Maggoner | 39 | Wife | — | Tennessee |
| 75 | Rayford Maggoner | 21 | Son | Laborer | Tennessee |
| 76 | Richard Maggoner | 19 | Son | Laborer | Tennessee |
| 77 | Oscar L. Maggoner | 16 | Son | — | Tennessee |
| 78 | Mamie Maggoner | 14 | Daughter | — | Tennessee |
| 79 | Willie J. Luster | 64 | Head | — | Tennessee |
| 80 | John S. Guthrie | 49 | Brother | Laborer | Tennessee |
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)