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Mary Blair — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Davidson-County, Tennessee
Our Model Tree links this Mary Blair across the 1920, 1930 and 1940 US Censuses in Davidson-County, Tennessee (XGBoost, ~Confirmed) — first a spouse (b.~1892), then head of a 8-person household.
Age 48
b. ~1892
Female
Spouse
Born: Tennessee
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Davidson-County, Tennessee |
| Surname | Blair |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Tennessee |
| 1935 Residence (City) | 9 District |
| 1935 Residence (County) | Davidson |
| Additional Details | |
| Occupation | Laundress |
| Industry | In Home |
| Class of Worker | OA |
| Hours Worked | 10 |
| Income (1939) | 40 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Occupation | Laundress |
| Township / Ward | 9 District |
| Est. Birth Year | ~1892 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Ruby Blair | Daughter | — | 16 | ~1924 |
| Helen Blair | Daughter | — | 24 | ~1916 |
| Lillian Blair | Daughter | — | 15 | ~1925 |
| Bernice Blair | Daughter | — | 14 | ~1926 |
| Thomas Blair | Head | — | 48 | ~1892 |
| Roy Blair | Son | — | 9 | ~1931 |
| Thomas Blair | Son | — | 23 | ~1917 |
| Mary Blair | Spouse | — | 48 | ~1892 |
Census Appearances
1920
Davidson, Tennessee
Spouse, age 26
Davidson, Tennessee · implied b. ~1894 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1930
Davidson, Tennessee
Spouse, age 35
Davidson, Tennessee · implied b. ~1895 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | Mary Jane |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Tennessee |
| Age at First Marriage | 22 |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Can Read/Write | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1940
Davidson-County, Tennessee
Spouse, age 48
Davidson-County, Tennessee · implied b. ~1892 — 8 household members
| Surname | Blair |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Tennessee |
| 1935 Residence (City) | 9 District |
| 1935 Residence (County) | Davidson |
| Occupation | Laundress |
| Industry | In Home |
| Class of Worker | OA |
| Hours Worked | 10 |
| Income (1939) | 40 |
| Highest Grade | 8 |
| 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 Mary 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
Mary Blair
Spouse · 1940 · age 48 · b. ~1892 · 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-t0627-03884-00233)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Kathleen Plitt | 13 | Daughter | — | Tennessee |
| 42 | Frances Plitt | 2 | Daughter | — | Tennessee |
| 43 | Wallace Carson | 49 | Head | Engineer | Tennessee |
| 44 | Brownie Carson | 44 | Wife | — | Tennessee |
| 45 | Ella Huggins | 68 | Mother-in-law | — | Tennessee |
| 46 | Obie Bibb | 44 | Head | — | Tennessee |
| 47 | Paris Bibb | 19 | Son | Alumnus|Aluminum Co. | Tennessee |
| 48 | Leslie Bibb | 16 | Son | New Worker | Tennessee |
| 49 | Wallace Bibb | 13 | Son | — | Tennessee |
| 50 | Fred Bibb | 11 | Son | — | Tennessee |
| 51 | Effie Bibb | 5 | Daughter | — | Tennessee |
| 52 | Thomas J. Blair | 48 | Head | Carpenter | Tennessee |
| 53 | Mary Blair THIS PERSON | 48 | Wife | Laundress | Tennessee |
| 54 | Helen Blair | 24 | Daughter | Waitress | Tennessee |
| 55 | Thomas Blair | 23 | Son | Labourer | Tennessee |
| 56 | Ruby Blair | 16 | Daughter | — | Tennessee |
| 57 | Lillian Blair | 15 | Daughter | — | Tennessee |
| 58 | Bernice Blair | 14 | Daughter | — | Tennessee |
| 59 | Roy Blair | 9 | Son | — | Tennessee |
| 60 | Willis Smith | 40 | Head | Manager | Tennessee |
| 61 | Neva Smith | 33 | Wife | — | Tennessee |
| 62 | Willie Jr. Smith | 11 | Son | — | Tennessee |
| 63 | Birdie Smith | 6 | Daughter | — | Tennessee |
| 64 | Dewey A. Pulley | 43 | Head | Proprietor | Tennessee |
| 65 | Ollie Pulley | 48 | Wife | — | Tennessee |
| 66 | Edward R. Pulley | 20 | Son | New Worker | Tennessee |
| 67 | Edwin R. Pulley | 18 | Son | — | Tennessee |
| 68 | Maynard M. Campbell | 31 | Head | Truck Driver | Tennessee |
| 69 | Nora Lee Campbell | 27 | Wife | — | Tennessee |
| 70 | Frances L. Campbell | 9 | Daughter | — | Tennessee |
| 71 | Malcolm W. Campbell | 3 | Son | — | Tennessee |
| 72 | Luther E. Campbell | 1 | Son | — | Tennessee |
| 73 | Luther S. Campbell | 56 | Head | Farmer | Tennessee |
| 74 | Birdie Campbell | 54 | Wife | — | Tennessee |
| 75 | Grady Campbell | 33 | Son | Helper | Tennessee |
| 76 | Victor Walker | 41 | Head | Farmer | Tennessee |
| 77 | Norman Walker | 54 | Wife | — | Tennessee |
| 78 | Mabel Walker | 22 | Daughter | Clerk | Tennessee |
| 79 | Annie Laura Walker | 20 | Daughter | — | Tennessee |
| 80 | Hill V. Walker | 18 | Son | — | 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)