RB
Robert Blair — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Vigo-County, Indiana
Our Model Tree links this Robert Blair across the 1930 and 1940 US Censuses in Vigo-County, Indiana (XGBoost, ~Confirmed) — first a son (b.~1922), then head of a 8-person household.
Age 18
b. ~1922
Male
Son
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Vigo-County, Indiana |
| Surname | Blair |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Burnett |
| 1935 Residence (County) | Vigo |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | Burnett |
| Est. Birth Year | ~1922 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Roy Blair | Head | — | 39 | ~1901 |
| Raymond Blair | Son | — | 14 | ~1926 |
| Robert Blair | Son | — | 18 | ~1922 |
| Dorothy Blair | Daughter | — | 11 | ~1929 |
| Elwood Blair | Son | — | 5 | ~1935 |
| Eva Blair | Daughter | — | 16 | ~1924 |
| Willis Blair | Son | — | 3 | ~1937 |
| Marie Blair | Spouse | — | 36 | ~1904 |
Census Appearances
1930
Vigo, Indiana
Son, age 8
Vigo, Indiana · implied b. ~1922 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | Robert W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Vigo-County, Indiana
Son, age 18
Vigo-County, Indiana · implied b. ~1922 — 8 household members
| Surname | Blair |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Burnett |
| 1935 Residence (County) | Vigo |
| Income (1939) | 0 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 Robert Blair across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Blair
Son · 1940 · age 18 · b. ~1922 · Indiana
★ You are viewing this record
Sibling
Willis Blair
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eva Blair
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elwood Blair
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Blair
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Blair
Sibling · 1940 · age 11
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 — Vigo-County, Indiana
Open full size
1940 US Federal Census — Vigo-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01105-00331)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Marion Hoff | 46 | Head | Miner | Indiana |
| 42 | Gertrude Hoff | 31 | Wife | — | Indiana |
| 43 | Mary Ann Hoff | 1 | Daughter | — | Indiana |
| 44 | Gus H. King | 41 | Head | Laborer | Indiana |
| 45 | Helen King | 32 | Wife | — | Indiana |
| 46 | Sheard Perkins | 33 | Head | Salesman | Indiana |
| 47 | Gladys Perkins | 28 | Wife | — | Indiana |
| 48 | Myra Jane Perkins | 16 | Daughter | — | Indiana |
| 49 | Edward Mcclain | 42 | Head | Laborer | Ohio |
| 50 | Helen Mcclain | 40 | Wife | — | Indiana |
| 51 | Charles Mcclain | 15 | Son | — | Indiana |
| 52 | Dorothy Mcclain | 13 | Daughter | — | Indiana |
| 53 | Ernest Carlin | 30 | Head | Salesman | Indiana |
| 54 | Mildred Carlin | 30 | Wife | — | Indiana |
| 55 | Thelma Carlin | 11 | Daughter | — | Indiana |
| 56 | Velma Carlin | 11 | Daughter | — | Indiana |
| 57 | Bobby Joe Carlin | 8 | Son | — | Indiana |
| 58 | Patricia Carlin | 4 | Daughter | — | Indiana |
| 59 | Barbara Carlin | 4 | Daughter | — | Indiana |
| 60 | Margaret Carlin | 2 | Daughter | — | Indiana |
| 61 | Clara E. Mcclara | 79 | Head | — | Indiana |
| 62 | Geldna Mcclara | 52 | Daughter | — | Indiana |
| 63 | Walter Christopher | 59 | Head | Laborer | Indiana |
| 64 | Nellie Christopher | 53 | Wife | — | Illinois |
| 65 | James M. Baker | 45 | Head | Laborer | Indiana |
| 66 | Opal Baker | 43 | Wife | — | Illinois |
| 67 | Beatrice Baker | 22 | Daughter | — | Indiana |
| 68 | Violet Baker | 19 | Daughter | New Worker | Indiana |
| 69 | Agnes Baker | 15 | Daughter | — | Indiana |
| 70 | Garland Baker | 13 | Son | — | Indiana |
| 71 | Mary Catherine Baker | 6 | Daughter | — | Indiana |
| 72 | Francis Lemmons | 66 | Head | — | Indiana |
| 73 | Roy Blair | 39 | Head | Laborer | Indiana |
| 74 | Marie Blair | 36 | Wife | — | Indiana |
| 75 | Robert Blair THIS PERSON | 18 | Son | — | Indiana |
| 76 | Eva Blair | 16 | Daughter | — | Indiana |
| 77 | Raymond Blair | 14 | Son | — | Indiana |
| 78 | Dorothy Blair | 11 | Daughter | — | Indiana |
| 79 | Elwood Blair | 5 | Son | — | Indiana |
| 80 | Willis Blair | 3 | Son | — | Indiana |
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)