JB
John Blair — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Tulsa-County, Oklahoma
Our Model Tree links this John Blair across the 1930 and 1940 US Censuses in Tulsa-County, Oklahoma (XGBoost, ~Confirmed) — first a son (b.~1920), then head of a 11-person household.
Age 20
b. ~1920
Male
Son
Born: Oklahoma
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Tulsa-County, Oklahoma |
| Surname | Blair |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Oklahoma |
| 1935 Residence (City) | Tulsa City |
| 1935 Residence (County) | Tulsa |
| Additional Details | |
| Occupation | Carpenter |
| Industry | Building Construction |
| Class of Worker | PW |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Oklahoma |
| Birth Country | United States |
| Birthplace (normalized) | oklahoma |
| Occupation | Carpenter |
| Township / Ward | Tulsa City |
| Est. Birth Year | ~1920 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Helen Blair | Daughter | — | 18 | ~1922 |
| Geraldine Blair | Daughter | — | 21 | ~1919 |
| Virginia Blair | Daughter | — | 11 | ~1929 |
| Ann Blair | Daughter | — | 15 | ~1925 |
| Elizabeth Blair | Daughter | — | 13 | ~1927 |
| Margaret Blair | Daughter | — | 2 | ~1938 |
| Isabelle Blair | Daughter | — | 23 | ~1917 |
| John Blair | Head | — | 54 | ~1886 |
| Joseph Blair | Son | — | 17 | ~1923 |
| John Blair | Son | — | 20 | ~1920 |
| Teresa Blair | Spouse | — | 45 | ~1895 |
Census Appearances
1930
Tulsa, Oklahoma
Son, age 10
Tulsa, Oklahoma · implied b. ~1920 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | John T. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Oklahoma |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Oklahoma |
| Birth Country | United States |
| Birthplace (normalized) | oklahoma |
1940
Tulsa-County, Oklahoma
Son, age 20
Tulsa-County, Oklahoma · implied b. ~1920 — 11 household members
| Surname | Blair |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Oklahoma |
| 1935 Residence (City) | Tulsa City |
| 1935 Residence (County) | Tulsa |
| Occupation | Carpenter |
| Industry | Building Construction |
| Class of Worker | PW |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Oklahoma |
| Birth Country | United States |
| Birthplace (normalized) | oklahoma |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Blair
Son · 1940 · age 20 · b. ~1920 · Oklahoma
★ You are viewing this record
Sibling
Margaret Blair
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Blair
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Blair
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Geraldine Blair
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Blair
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ann Blair
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Blair
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Isabelle Blair
Sibling · 1940 · age 23
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 — Tulsa-County, Oklahoma
Open full size
1940 US Federal Census — Tulsa-County, Oklahoma
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03349-00179)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George Donaldson | 45 | Head | General Agent | Canada-English |
| 2 | Sibyl Donaldson | 42 | Wife | — | Canada-English |
| 3 | William Donaldson | 17 | Son | — | Canada-English |
| 4 | Mary Donaldson | 14 | Daughter | — | Canada-English |
| 5 | J. Dean Hull | 40 | Head | Assistant Div Credit Manager | West Virginia |
| 6 | Catherine Hull | 36 | Wife | — | Kansas |
| 7 | J. Dean Jr Hull | 8 | Son | — | Oklahoma |
| 8 | Catherine Hull | 2 | Daughter | — | Oklahoma |
| 9 | Emanuel Burney | 35 | Head | Laborer | Oklahoma |
| 10 | Mary Burney | 35 | Wife | Cook-Maid | Oklahoma |
| 11 | — | None | — | — | — |
| 12 | Oscar Grimes | 30 | Head | Royalty Dealer | Oklahoma |
| 13 | Velva Grimes | 29 | Wife | — | Arkansas |
| 14 | Joann Grimes | 4 | Daughter | — | Oklahoma |
| 15 | Gloria Grimes | 2 | Daughter | — | Oklahoma |
| 16 | Rada Jenkins | 20 | Servant | Cook-Maid | Oklahoma |
| 17 | Watson B Joyes | 49 | Head | Oil Operator | Kentucky |
| 18 | Anne Joyes | 41 | Wife | — | Missouri |
| 19 | Betty Joyes | 20 | Daughter | — | Missouri |
| 20 | Corean Jones | 24 | Head | Cook-Maid | Oklahoma |
| 21 | L. D. Reynolds | 38 | Head | Owner | Oklahoma |
| 22 | Lera B Reynolds | 36 | Wife | — | Texas |
| 23 | Roy L Reynolds | 1 | Son | — | Oklahoma |
| 24 | Lucy Mcclain | 58 | Head | — | Texas |
| 25 | Bernice Mcclain | 25 | Sister-in-law | — | Oklahoma |
| 26 | C. J. Milligan | 16 | Head | Fountain Boy | Oklahoma |
| 27 | John G Blair | 54 | Head | Chief Valuator | Kansas |
| 28 | Teresa Blair | 45 | Wife | — | Pennsylvania |
| 29 | Isabelle Blair | 23 | Daughter | Bookkeeper | Oklahoma |
| 30 | Geraldine Blair | 21 | Daughter | — | Oklahoma |
| 31 | John Blair THIS PERSON | 20 | Son | Carpenter | Oklahoma |
| 32 | Helen Blair | 18 | Daughter | — | Oklahoma |
| 33 | Joseph Blair | 17 | Son | — | Oklahoma |
| 34 | Ann Blair | 15 | Daughter | — | Oklahoma |
| 35 | Elizabeth Blair | 13 | Daughter | — | Oklahoma |
| 36 | Virginia Blair | 11 | Daughter | — | Oklahoma |
| 37 | Margaret Blair | 2 | Daughter | — | Oklahoma |
| 38 | — | None | — | — | — |
| 39 | Fred Daniel | 43 | Head | Insurance Agent | Mississippi |
| 40 | Mildred Daniel | 36 | Wife | — | 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)