JB
John Blair — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Wabash-County, Illinois
Our Model Tree links this John Blair across the 1920, 1930 and 1940 US Censuses in Wabash-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1886), then head of a 6-person household.
Age 54
b. ~1886
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Wabash-County, Illinois |
| Surname | Blair |
| Given Name | John A. B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Mt Carmel |
| 1935 Residence (County) | Wabash |
| Additional Details | |
| Occupation | Boiler maker |
| Industry | R. R. |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 304 |
| Highest Grade | No 4 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Boiler Maker |
| Township / Ward | Mt Carmel City |
| Est. Birth Year | ~1886 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Anna Blair | Daughter | — | 4 | ~1936 |
| John Blair | Head | — | 54 | ~1886 |
| Rebecka Race | Other | — | 23 | ~1917 |
| Guy Blair | Son | — | 26 | ~1914 |
| Maxine Blair | Spouse | — | 24 | ~1916 |
| Emma Blair | Spouse | — | 48 | ~1892 |
Census Appearances
1920
Wabash, Illinois
Head, age 33
Wabash, Illinois · implied b. ~1887 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Laborer |
| Industry | Rail Road |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Wabash, Illinois
Head, age 44
Wabash, Illinois · implied b. ~1886 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 25 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Boilermaker |
| Industry | At R.R. Shops |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 1000 |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Wabash-County, Illinois
Head, age 54
Wabash-County, Illinois · implied b. ~1886 — 6 household members
| Surname | Blair |
| Given Name | John A. B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Mt Carmel |
| 1935 Residence (County) | Wabash |
| Occupation | Boiler maker |
| Industry | R. R. |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 304 |
| Highest Grade | No 4 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 54 · b. ~1886 · Illinois
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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 — Wabash-County, Illinois
Open full size
1940 US Federal Census — Wabash-County, Illinois
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-00900-00335)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Audrey Belcher | 20 | Daughter | Operator | Illinois |
| 42 | Junior H. Belcher | 14 | Son | — | Illinois |
| 43 | Oma Seaton | 23 | Niece | Machine Girl | Illinois |
| 44 | Jessie Belcher | 84 | Father | — | Indiana |
| 45 | John Webber | 24 | Head | Clerk | Illinois |
| 46 | Olive Webber | 22 | Wife | Machine Girl | Illinois |
| 47 | John K. Webber | 3 | Son | — | Illinois |
| 49 | John A. B. Blair THIS PERSON | 54 | Head | Boiler Maker | Illinois |
| 50 | Emma Blair | 48 | Wife | — | Illinois |
| 51 | Guy Blair | 26 | Son | Machinist | Illinois |
| 52 | Maxine Blair | 24 | Wife | — | Illinois |
| 53 | Anna Lee Blair | 4 | Daughter | — | Illinois |
| 54 | Rebecka Race | 23 | Boarder | — | Illinois |
| 55 | Flay Hammer | 37 | Head | Laborer | Oklahoma |
| 56 | Vella Hammer | 35 | Wife | — | Oklahoma |
| 57 | Wallace Hammer | 15 | Son | — | Kansas |
| 58 | Sam Morrow | 40 | Head | Laborer | Kentucky |
| 59 | Margaret Morrow | 36 | Wife | — | Maryland |
| 60 | Samuel Morrow | 17 | Son | Laborer | Indiana |
| 61 | Louise M. Morrow | 15 | Daughter | — | Maryland |
| 62 | Myrtie Morrow | 10 | Daughter | — | Indiana |
| 63 | Pauline Morrow | 8 | Daughter | — | Indiana |
| 64 | Alice Morrow | 5 | Daughter | — | Illinois |
| 65 | Francis K. Morrow | 1 | Daughter | — | Illinois |
| 66 | Walter D. Case | 44 | Head | Laborer | Indiana |
| 67 | Mary Case | 24 | Wife | — | Indiana |
| 68 | Ruby Case | 8 | Daughter | — | Indiana |
| 69 | Delores Case | 6 | Daughter | — | Indiana |
| 70 | Jewel Case | 4 | Daughter | — | Indiana |
| 71 | Sam Mccaslin | 37 | Head | Laborer | Illinois |
| 72 | Marie Mccaslin | 29 | Wife | — | Indiana |
| 73 | Betty Mccaslin | 11 | Daughter | — | Indiana |
| 75 | Archie Bethel | 48 | Head | Contractor | Ohio |
| 76 | Marguerite Bethel | 44 | Wife | — | Missouri |
| 77 | Gerald Bethel | 17 | Son | — | Ohio |
| 78 | Normalee Bethel | 14 | Daughter | — | Ohio |
| 79 | Burnham Bethel | 13 | Son | — | Missouri |
| 80 | Betty Jane Bethel | 13 | Daughter | — | Missouri |
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)