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John Blair — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Loudon-County, Tennessee
Our Model Tree links this John Blair across the 1900, 1910, 1920, 1930 and 1940 US Censuses in Loudon-County, Tennessee (XGBoost, ~Confirmed) — first a head (b.~1882), then head of a 4-person household.
Age 58
b. ~1882
Male
Head
Born: Tennessee
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Loudon-County, Tennessee |
| Surname | Blair |
| Given Name | John T |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Tennessee |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Loudon |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | No 3 |
| 1935 Residence | Tenn |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Occupation | Farmer |
| Township / Ward | Civil District No 1 |
| Est. Birth Year | ~1882 |
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 |
|---|---|---|---|---|
| Ruby Blair | Daughter | — | 16 | ~1924 |
| John Blair | Head | — | 58 | ~1882 |
| John Blair | Son | — | 9 | ~1931 |
| Annie Blair | Spouse | — | 51 | ~1889 |
Census Appearances
1900
Loudon, Tennessee
Head, age 20
Loudon, Tennessee · implied b. ~1880 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | John J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Birth Month | Apr |
| Birth Year | 1880 |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Occupation | Farm Laborer |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1910
Loudon, Tennessee
Head, age 29
Loudon, Tennessee · implied b. ~1881 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Tennessee |
| Years Married | 2 |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Occupation | Farm laborer |
| Industry | home farm |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1920
Loudon, Tennessee
Head, age 38
Loudon, Tennessee · implied b. ~1882 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | John T. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | OA |
| 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
Loudon, Tennessee
Head, age 48
Loudon, Tennessee · implied b. ~1882 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | John G. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Tennessee |
| Age at First Marriage | 27 |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | 500 |
| Veteran | O |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1940
Loudon-County, Tennessee
Head, age 58
Loudon-County, Tennessee · implied b. ~1882 — 4 household members
| Surname | Blair |
| Given Name | John T |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Tennessee |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Loudon |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | No 3 |
| 1935 Residence | Tenn |
| 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 5 US Census years (1900, 1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Blair
Head · 1940 · age 58 · b. ~1882 · 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 — Loudon-County, Tennessee
Open full size
1940 US Federal Census — Loudon-County, Tennessee
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03914-00124)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Sam Raymond | 65 | Head | Farmer | Tennessee |
| 42 | Emmett Langer | 36 | Head | Tenant Farmer | Tennessee |
| 43 | Lillie S Langer | 34 | Wife | — | Tennessee |
| 44 | Jane Ellen Langer | 9 | Daughter | — | Tennessee |
| 45 | Carolyn S Langer | 6 | Daughter | — | Tennessee |
| 46 | Lana Ann Langer | 1 | Daughter | — | Tennessee |
| 47 | H L Palmer | 63 | Head | Tenant Farmer | Tennessee |
| 48 | Emma S Palmer | 64 | Wife | — | Tennessee |
| 49 | Ulis Palmer | 31 | Son | Farm Helper | Tennessee |
| 50 | Frank Palmer | 30 | Son | Farm Helper | Tennessee |
| 51 | Robert Palmer | 23 | Son | Farm Helper | Tennessee |
| 52 | Mary Palmer | 18 | Daughter | — | Tennessee |
| 53 | Lucille Palmer | 13 | Daughter | — | Tennessee |
| 54 | John T Blair THIS PERSON | 58 | Head | Farmer | Tennessee |
| 55 | Annie Blair | 51 | Wife | — | Tennessee |
| 56 | Ruby Ann Blair | 16 | Daughter | — | Tennessee |
| 57 | John T Jr Blair | 9 | Son | — | Tennessee |
| 58 | Fannie P Butler | 60 | Head | — | Tennessee |
| 59 | Lissie K Butler | 54 | Sister | — | Tennessee |
| 60 | Anton Mckelvey | 71 | Head | Farmer | Tennessee |
| 61 | Cora W Mckelvey | 48 | Wife | — | Tennessee |
| 62 | John Mckelvey | 76 | Brother | — | Tennessee |
| 63 | E B Jacobs | 57 | Head | Farmer | Tennessee |
| 64 | Mary Jacobs | 53 | Wife | — | Tennessee |
| 65 | Oney Jacobs | 27 | Son | Tenant Farmer | Tennessee |
| 66 | E B Jr Jacobs | 19 | Son | Laborer Farm | Tennessee |
| 67 | Harriet Jacobs | 12 | Son | — | Tennessee |
| 68 | Loyd E Isom | 27 | Head | Farmer | Tennessee |
| 69 | Christine Isom | 32 | Wife | Seamer | Tennessee |
| 70 | Laura Isom | 7 | Daughter | — | Tennessee |
| 71 | Ernest Jaynes | 31 | Head | Laborer | Tennessee |
| 72 | Ruby M Jaynes | 27 | Wife | — | Tennessee |
| 73 | Boyd F Jaynes | 7 | Son | — | Tennessee |
| 74 | Charles Wesley Jaynes | 4 | Son | — | Tennessee |
| 75 | Ivan Allen Jaynes | 3 | Son | — | Tennessee |
| 76 | Billie Ray Jaynes | 1 | Son | — | Tennessee |
| 77 | Silas Raymond James | 29 | Head | Laborer | Tennessee |
| 78 | Inez James | 22 | Wife | — | Tennessee |
| 79 | Arthur James | 4 | Son | — | Tennessee |
| 80 | Russ Morgan | 46 | Head | Farmer | 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)