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Mary Blackwell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Person-County, North Carolina
Our Model Tree links this Mary Blackwell across the 1930 and 1940 US Censuses in Person-County, North Carolina (XGBoost, ~Confirmed) — first a daughter (b.~1921), then head of a 11-person household.
Age 19
b. ~1921
Female
Daughter
Born: North Carolina
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Person-County, North Carolina |
| Surname | Blackwell |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 19 |
| Marital Status | Single |
| Birthplace | North Carolina |
| 1935 Residence (City) | Roxboro Township |
| 1935 Residence (County) | Person |
| Additional Details | |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | North Carolina |
| Birth Country | United States |
| Birthplace (normalized) | north carolina |
| Township / Ward | Roxboro Township |
| Est. Birth Year | ~1921 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Rachel Blackwell | Daughter | — | 16 | ~1924 |
| Wallace Blackwell | Son | — | 9 | ~1931 |
| Sallie Blackwell | Daughter | — | 6 | ~1934 |
| Hennie Blackwell | Daughter | — | 12 | ~1928 |
| Irene Blackwell | Spouse | — | 41 | ~1899 |
| Olivia Blackwell | Daughter | — | 10 | ~1930 |
| Richard Blackwell | Son | — | 20 | ~1920 |
| Mary Blackwell | Daughter | — | 19 | ~1921 |
| Rubin Blackwell | Head | — | 54 | ~1886 |
| Lucy Blackwell | Daughter | — | 14 | ~1926 |
| Bird Blackwell | Son | — | 5 | ~1935 |
Census Appearances
1930
Person, North …
Daughter, age 8
Person, North Carolina · implied b. ~1922 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blackwell |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 8 |
| Marital Status | Single |
| Birthplace | North Carolina |
| Father's Birthplace | North Carolina |
| Mother's Birthplace | North Carolina |
| Occupation | none |
| Birth State | North Carolina |
| Birth Country | United States |
| Birthplace (normalized) | north carolina |
1940
Person-County, North …
Daughter, age 19
Person-County, North Carolina · implied b. ~1921 — 11 household members
| Surname | Blackwell |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 19 |
| Marital Status | Single |
| Birthplace | North Carolina |
| 1935 Residence (City) | Roxboro Township |
| 1935 Residence (County) | Person |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | North Carolina |
| Birth Country | United States |
| Birthplace (normalized) | north carolina |
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 Blackwell across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Blackwell
Daughter · 1940 · age 19 · b. ~1921 · North Carolina
★ You are viewing this record
Sibling
Richard Blackwell
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lucy Blackwell
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rachel Blackwell
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hennie Blackwell
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Olivia Blackwell
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wallace Blackwell
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sallie Blackwell
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bird Blackwell
Sibling · 1940 · age 5
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 — Person-County, North Carolina
Open full size
1940 US Federal Census — Person-County, North Carolina
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02957-00486)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Buck Blackwell | 66 | Head | Farmer | North Carolina |
| 2 | Arthur Blackwell | 22 | Son | Laborer | North Carolina |
| 3 | Minnie Blackwell | 23 | Daughter | — | North Carolina |
| 4 | Champ Blackwell | 21 | Son | Mechanic | North Carolina |
| 5 | Carnor Blackwell | 18 | Son | Laborer | North Carolina |
| 6 | Cleo Blackwell | 17 | Daughter | — | North Carolina |
| 7 | Rubin Blackwell | 54 | Head | Farmer | North Carolina |
| 8 | Irene Blackwell | 41 | Wife | — | North Carolina |
| 9 | Richard Blackwell | 20 | Son | Laborer | North Carolina |
| 10 | Mary Blackwell THIS PERSON | 19 | Daughter | — | North Carolina |
| 11 | Rachel Blackwell | 16 | Daughter | — | North Carolina |
| 12 | Lucy Blackwell | 14 | Daughter | — | North Carolina |
| 13 | Hennie Blackwell | 12 | Daughter | — | North Carolina |
| 14 | Olivia Blackwell | 10 | Daughter | — | North Carolina |
| 15 | Wallace Blackwell | 9 | Son | — | North Carolina |
| 16 | Sallie Blackwell | 6 | Daughter | — | North Carolina |
| 17 | Bird Blackwell | 5 | Son | — | North Carolina |
| 18 | Calvin Jones | 37 | Head | — | North Carolina |
| 19 | Annie Bee Jones | 32 | Wife | — | North Carolina |
| 20 | John Blackwell | 33 | Head | Laborer | North Carolina |
| 21 | Elsie Blackwell | 29 | Wife | — | North Carolina |
| 22 | John Blackwell | 9 | Son | — | North Carolina |
| 23 | R. C. Blackwell | 5 | Son | — | North Carolina |
| 24 | Charlie Blackwell | 39 | Head | Saw Mill Worker | North Carolina |
| 25 | Beatrice Blackwell | 40 | Wife | — | North Carolina |
| 26 | Louise Blackwell | 2 | Daughter | — | Maryland |
| 27 | Arthur Harris | 20 | Boarder | — | North Carolina |
| 28 | Johnnie Cates | 58 | Head | Farmer | North Carolina |
| 29 | Johnnie Cates | 54 | Wife | — | North Carolina |
| 30 | Ephrimia Cates | 23 | Son | Laborer | North Carolina |
| 31 | Charlie Cates | 21 | Son | Laborer | North Carolina |
| 32 | Ed Cates | 20 | Son | Laborer | North Carolina |
| 33 | Roy Cates | 14 | Son | — | North Carolina |
| 34 | Isabell Cates | 13 | Daughter | — | North Carolina |
| 35 | Lois Rastade | 13 | Daughter | — | North Carolina |
| 36 | Generous Cates | 64 | Brother | Laborer | North Carolina |
| 37 | Katie Oakley | 50 | Head | Farmer | North Carolina |
| 38 | Maggie Oakley | 53 | Wife | — | North Carolina |
| 39 | Raymond Oakley | 18 | Son | Laborer | North Carolina |
| 40 | Marie Oakley | 14 | Daughter | — | North Carolina |
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)